feat: added big 6 wheel to the casino

22 files changed, 1513 insertions, 43 deletions

diff --git a/internal/casino/baccarat.go b/internal/casino/baccarat.go
index f1ba951..d385834 100644
--- a/internal/casino/baccarat.go
+++ b/internal/casino/baccarat.go
@@ -113,7 +113,7 @@ func (t *baccaratTable) menuEvent(name string) Event {
 	}
 	commands := []MenuCommand{}
 	if p != nil && p.hasLastBet() {
-		commands = append(commands, MenuCommand{Command: "bet", Desc: "Repeat your last bets"})
+		commands = append(commands, MenuCommand{Command: "bet / rebet", Desc: "Repeat your last bets"})
 	}
 	if p != nil && len(p.sides) > 0 {
 		commands = append(commands, MenuCommand{Command: "unbet", Desc: "Take back your side bets"})
diff --git a/internal/casino/big_six.go b/internal/casino/big_six.go
new file mode 100644
index 0000000..6d16bbc
--- /dev/null
+++ b/internal/casino/big_six.go
@@ -0,0 +1,530 @@
+package casino
+
+import (
+	"fmt"
+	"math/big"
+	"math/rand"
+	"strings"
+)
+
+// BigSixSpot describes a physical symbol and its profit odds. The dollar
+// labels follow Draft Kings; counts and odds are adjusted for this house.
+// Reference: https://wizardofodds.com/games/big-six/ (Draft Kings Rules).
+type BigSixSpot struct {
+	Label       string
+	Count, Pays int
+}
+
+func BigSixSpots() []BigSixSpot {
+	return []BigSixSpot{
+		{"1", 24, 1}, {"2", 12, 3}, {"5", 6, 7}, {"10", 4, 11}, {"20", 2, 23},
+		{"SWORD", 1, 47}, {"SHIELD", 1, 47}, {"DOUBLE", 1, 0},
+	}
+}
+
+// Each ordinary symbol has count*(profit+1)=48. With N=51 and D=1,
+// E = 48/51 + (2/51)*E = 48/49 = 97.95918367%, for EVERY target.
+// DOUBLE is not a bet: it doubles all live stakes and spins again. No rounding.
+func bigSixHouseEdge(_ TableConfig, bet string) HouseEdge {
+	if bigSixPayout(bet) > 0 {
+		return edge(1.0 / 49)
+	}
+	return unknownEdge("unrecognized Big 6 target")
+}
+func bigSixTarget(s string) string {
+	return strings.TrimPrefix(strings.ToUpper(strings.TrimSpace(s)), "$")
+}
+func bigSixPayout(s string) int {
+	for _, spot := range BigSixSpots() {
+		if spot.Label == bigSixTarget(s) && spot.Pays > 0 {
+			return spot.Pays + 1
+		}
+	}
+	return 0
+}
+func bigSixRules(TableConfig) string {
+	return "Big 6: bet on $1, $2, $5, $10, $20, SWORD or SHIELD. Profit odds: 1, 3, 7, 11, 23, 47, 47 to 1. DOUBLE doubles every live bet and respins without a cap. RTP 48/49 (97.959%). Alone, place any number of bets then spin; multiplayer betting lasts 25 ticks, even with no bets."
+}
+
+// A fixed, interleaved physical wheel, never shuffled during a round.
+var bigSixWheel = func() []string {
+	var wheel []string
+	for _, spot := range BigSixSpots() {
+		for i := 0; i < spot.Count; i++ {
+			wheel = append(wheel, spot.Label)
+		}
+	}
+	rand.New(rand.NewSource(601)).Shuffle(len(wheel), func(i, j int) { wheel[i], wheel[j] = wheel[j], wheel[i] })
+	return wheel
+}()
+
+type bigSixBet struct {
+	spot  string
+	wager Wager
+}
+type bigSixPlayer struct {
+	Participant
+	bets     []bigSixBet
+	lastSpot string
+	lastBet  int
+}
+
+func (p *bigSixPlayer) participantPtr() *Participant { return &p.Participant }
+
+type bigSixFrame struct{ delay, move int }
+type bigSixTable struct {
+	tableCore[*bigSixPlayer]
+	rng                                 *rand.Rand
+	frames                              []bigSixFrame
+	frame, wait, position, winningIndex int
+	// Arbitrary precision keeps DOUBLE chains uncapped and prevents wraparound.
+	multiplier big.Int
+	lastResult *BigSixSnapshot
+}
+type BigSixSnapshot struct {
+	Players        []string
+	Phase          string
+	Pockets        []string
+	Multiplier     string
+	BettingTicks   int
+	MinBet, MaxBet int
+}
+
+func (*BigSixSnapshot) snapshot() {}
+func newBigSixTable(room int, cfg TableConfig, rng *rand.Rand) *bigSixTable {
+	t := &bigSixTable{tableCore: newTableCore[*bigSixPlayer](&tableBase{RoomID: room, Config: cfg.Normalize()}), rng: rng}
+	t.multiplier.SetInt64(1)
+	return t
+}
+func (t *bigSixTable) active() int {
+	n := 0
+	for _, p := range t.players.ordered() {
+		if p.Connected && !p.SittingOut {
+			n++
+		}
+	}
+	return n
+}
+func (t *bigSixTable) openRound() []Event {
+	if t.phase == phaseWaiting && t.active() > 1 {
+		t.phase = phaseBetting
+		t.window.open(25)
+		return []Event{t.event("Big 6 betting is open for 25 ticks.", true)}
+	}
+	return nil
+}
+func (t *bigSixTable) view() *BigSixSnapshot {
+	s := &BigSixSnapshot{Phase: string(t.phase), Multiplier: t.multiplier.String(), BettingTicks: t.window.timer.remaining(), MinBet: t.Config.MinBet, MaxBet: t.Config.MaxBet}
+	for _, p := range t.players.ordered() {
+		s.Players = append(s.Players, p.Name)
+	}
+	return s
+}
+func (t *bigSixTable) strip(result bool) *BigSixSnapshot {
+	s := t.view()
+	count := 11
+	if result {
+		s.Phase = "result"
+		count = 9
+	}
+	for i := 0; i < count; i++ {
+		s.Pockets = append(s.Pockets, bigSixWheel[(t.position+i-count/2+len(bigSixWheel))%len(bigSixWheel)])
+	}
+	return s
+}
+func (t *bigSixTable) board(_ string) Snapshot {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.view()
+}
+func (t *bigSixTable) wagerRows() []WagerRow {
+	if t.phase == phasePlaying {
+		return nil
+	}
+	var rows []WagerRow
+	for _, s := range BigSixSpots() {
+		if s.Pays > 0 {
+			rows = append(rows, WagerRow{Bet: s.Label, Payout: fmt.Sprintf("%d:1", s.Pays), Win: "Wheel stops on " + s.Label})
+		}
+	}
+	return rows
+}
+func (t *bigSixTable) wagers(_ string) []WagerRow {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.wagerRows()
+}
+func (t *bigSixTable) commands(name string) []MenuCommand {
+	var c []MenuCommand
+	if p := t.players.get(name); p != nil && t.phase != phasePlaying {
+		c = append(c, MenuCommand{Command: "bet N on BET", Desc: "Add a wager"})
+		if p.lastBet > 0 {
+			c = append(c, MenuCommand{Command: "bet / rebet", Desc: "Repeat your last wager"})
+		}
+		if p.HasBet {
+			c = append(c, MenuCommand{Command: "unbet", Desc: "Take back all wagers"})
+		}
+		if t.phase == phaseWaiting {
+			c = append(c, MenuCommand{Command: "spin", Desc: "Start the wheel"})
+		}
+	}
+	c = append(c, MenuCommand{Command: "table", Desc: "Show the felt"}, MenuCommand{Command: "stop", Desc: "Leave after your bets settle"})
+	return withTableHints(c, t.wagerRows())
+}
+func (t *bigSixTable) hints(name string) []MenuCommand {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.commands(name)
+}
+func (t *bigSixTable) menu(name string, board bool) Event {
+	e := t.betMenuEvent(name, t.commands(name))
+	if board {
+		e.Snapshot = t.view()
+	}
+	return e
+}
+func (t *bigSixTable) join(name string) []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	if t.players.has(name) {
+		return []Event{t.menu(name, true)}
+	}
+	if t.players.count() >= t.Config.MaxPlayers {
+		return []Event{t.private(name, "The Big 6 table is full.")}
+	}
+	e := t.addSeatLocked(name, &bigSixPlayer{Participant: Participant{Name: name, Connected: true}})
+	events := append([]Event{e}, t.openRound()...)
+	return append(events, t.menu(name, true))
+}
+func (t *bigSixTable) leave(name string) []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	p := t.players.get(name)
+	if p == nil {
+		return nil
+	}
+	if p.HasBet {
+		return []Event{t.private(name, "Your Big 6 wagers are committed until the round ends.")}
+	}
+	t.removeSeatLocked(name)
+	if t.players.count() == 0 {
+		t.reset()
+	}
+	return t.closeIfEmptyLocked([]Event{t.playerAction(name, name+" stands up.", "You stand up.")})
+}
+func (t *bigSixTable) bet(name, spot string, amount int, w Wallet) []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	p := t.players.get(name)
+	if p == nil {
+		return []Event{t.private(name, "You aren't playing Big 6.")}
+	}
+	if t.phase == phasePlaying {
+		return []Event{t.private(name, "No more bets! The wheel is spinning.")}
+	}
+	if spot == "" {
+		spot = p.lastSpot
+	}
+	spot = bigSixTarget(spot)
+	if bigSixPayout(spot) == 0 {
+		return []Event{t.private(name, "Bet on 1, 2, 5, 10, 20, SWORD or SHIELD. DOUBLE is automatic, not a bet.")}
+	}
+	if amount < t.Config.MinBet || amount > t.Config.MaxBet {
+		return []Event{t.private(name, "Big 6 bets must be "+betRangeText(t.Config.MinBet, t.Config.MaxBet)+".")}
+	}
+	// Keep the original aggregate representable for shared menus and refunds.
+	if amount > int(^uint(0)>>1)-p.Wager.Total {
+		return []Event{t.private(name, "Your total stake is too large.")}
+	}
+	wager, err := w.Wager(amount)
+	if err != nil {
+		return []Event{t.private(name, walletErrorMessage(err))}
+	}
+	p.bets = append(p.bets, bigSixBet{spot, wager})
+	p.HasBet = true
+	p.Wallet = w
+	p.Wager.Total += amount
+	p.lastSpot, p.lastBet, p.SittingOut = spot, amount, false
+	events := []Event{t.playerAction(name, fmt.Sprintf("%s bets %d on %s.", name, amount, spot), fmt.Sprintf("You bet %d on %s.", amount, spot))}
+	return append(events, t.openRound()...)
+}
+
+// Motion is planned backwards from an independently sampled uniform outcome.
+// Cosmetic randomness never consumes the table outcome RNG. Steps never grow
+// and waits never shrink, so the wheel only ever slows.
+//
+// The final approach ticks one space at a time. The wheel caps its wait so
+// it never crawls, but each click has a 50% chance of one more, so it can
+// tease forever. Half the time the very last click does not advance at all:
+// it re-prints the winning space. Only that last click may take a long pause.
+func bigSixAnimation() []bigSixFrame {
+	var frames []bigSixFrame
+	// Opening blur: 3-6 prints of 4-8 spaces each, easing down. (Two steps
+	// shorter than before so the wheel reaches its final approach sooner.)
+	step := 4 + rand.Intn(5) // 4..8
+	for n := 3 + rand.Intn(4); n > 0; n-- {
+		frames = append(frames, bigSixFrame{1, step})
+		if step > 4 && rand.Intn(2) == 0 {
+			step--
+		}
+	}
+	// The wheel eases down: longer waits, shorter hops.
+	step = min(step, 2+rand.Intn(3)) // 2..4
+	for n := 1 + rand.Intn(2); n > 0; n-- {
+		frames = append(frames, bigSixFrame{2, step})
+	}
+	step = min(step, 1+rand.Intn(2)) // 1..2
+	frames = append(frames, bigSixFrame{3, step})
+	// Final approach: single-space clicks. The wait is capped at maxApproachWait
+	// so the wheel keeps moving; after at least three clicks it may stop, but
+	// each further click has a 50% chance to continue.
+	const maxApproachWait = 4
+	for clicks := 1; ; clicks++ {
+		frames = append(frames, bigSixFrame{maxApproachWait, 1})
+		if clicks >= 3 && rand.Intn(2) == 0 {
+			break
+		}
+	}
+	// Half the time the wheel makes one final stationary click, printing the
+	// winning space again instead of ticking over to the next one.
+	if rand.Intn(2) == 0 {
+		frames = append(frames, bigSixFrame{maxApproachWait, 0})
+	}
+	// Occasionally a long suspense pause before the final click.
+	if rand.Intn(3) == 0 {
+		frames[len(frames)-1].delay = 8 + rand.Intn(5)
+	}
+	return frames
+}
+func (t *bigSixTable) startSpin() Event {
+	t.phase = phasePlaying
+	t.window.close()
+	t.winningIndex = t.rng.Intn(len(bigSixWheel))
+	t.frames = bigSixAnimation()
+	t.frame = 0
+	distance := 0
+	for _, f := range t.frames {
+		distance += f.move
+	}
+	t.position = (t.winningIndex - distance%len(bigSixWheel) + len(bigSixWheel)) % len(bigSixWheel)
+	t.wait = t.frames[0].delay
+	return t.event("No more bets! The brass Big 6 wheel begins to turn...", true)
+}
+func (t *bigSixTable) tick() []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	if t.phase == phaseWaiting {
+		return t.openRound()
+	}
+	if t.phase == phaseBetting {
+		t.window.timer.tick()
+		if t.window.timer.expired() {
+			return []Event{t.startSpin()}
+		}
+		return nil
+	}
+	t.wait--
+	if t.wait > 0 {
+		return nil
+	}
+	t.position = (t.position + t.frames[t.frame].move) % len(bigSixWheel)
+	t.frame++
+	if t.frame == len(t.frames) {
+		return t.settle()
+	}
+	t.wait = t.frames[t.frame].delay
+	e := t.event("", true)
+	e.Snapshot = t.strip(false)
+	return []Event{e}
+}
+func (t *bigSixTable) settle() []Event {
+	spot := bigSixWheel[t.winningIndex]
+	t.position = t.winningIndex
+	e := t.event("The pointer stops on {casino_emphasis}"+spot+"{/}!", true)
+	e.Snapshot = t.strip(true)
+	t.lastResult = e.Snapshot.(*BigSixSnapshot)
+	events := []Event{e}
+	if spot == "DOUBLE" {
+		t.multiplier.Lsh(&t.multiplier, 1)
+		events = append(events, t.event("DOUBLE! Every live bet doubles; the same bets ride again. Stake multiplier: "+t.multiplier.String()+"x.", true))
+		return append(events, t.startSpin())
+	}
+	for _, p := range t.players.ordered() {
+		if !p.HasBet {
+			continue
+		}
+		total := new(big.Int)
+		var ids []string
+		var lines []SettlementLine
+		representable := true
+		for _, b := range p.bets {
+			ids = append(ids, b.wager.ID)
+			returned := new(big.Int)
+			result := "loss"
+			if b.spot == spot {
+				returned.Mul(big.NewInt(int64(b.wager.Total)), &t.multiplier)
+				returned.Mul(returned, big.NewInt(int64(bigSixPayout(spot))))
+				result = "win"
+			}
+			total.Add(total, returned)
+			if !returned.IsInt64() || returned.Cmp(big.NewInt(int64(int(^uint(0)>>1)))) > 0 {
+				representable = false
+			}
+			odds := new(big.Int).Mul(&t.multiplier, big.NewInt(int64(bigSixPayout(b.spot))))
+			odds.Sub(odds, big.NewInt(1))
+			lines = append(lines, SettlementLine{Label: b.spot, Odds: odds.String() + ":1", Stake: b.wager.Total, Returned: int(returned.Int64()), Result: result})
+		}
+		if !total.IsInt64() || total.Cmp(big.NewInt(int64(int(^uint(0)>>1)))) > 0 {
+			representable = false
+		}
+		// One atomic save pays ALL bets and consumes exactly their ledger handles.
+		// Unrepresentable payouts stay pending for recovery, never wrap or clamp.
+		failed := !representable
+		if !failed {
+			failed = p.Wallet.PayCredits(int(total.Int64()), ids...) != nil
+		}
+		ev := t.playerAction(p.Name, p.Name+" settles their Big 6 wagers.", "")
+		if failed {
+			ev.PrivateMessage = payoutFailedMessage()
+			ev.Message = p.Name + "'s settlement is pending recovery."
+		} else {
+			ev.PrivateMessage = settlementText(lines)
+			ev.Settlement = lines
+			if t.multiplier.Cmp(big.NewInt(1)) > 0 {
+				ev.SettlementNote = "DOUBLE stake multiplier: " + t.multiplier.String() + "x; odds and net are relative to your original stake."
+			}
+			ev.Color = settlementTag(lines)
+		}
+		// The next-spin menu already shows the balance for seats that remain.
+		// Only a departing or disconnected seat needs it here, otherwise the
+		// wallet would print twice after a result.
+		ev.ShowBalance = !failed && (p.LeaveAfter || p.SitOutAfter || !p.Connected)
+		events = append(events, ev)
+	}
+	t.reset()
+	events = append(events, t.finishControlsLocked()...)
+	events = append(events, t.openRound()...)
+	for _, p := range t.players.ordered() {
+		if p.Connected && !p.SittingOut {
+			events = append(events, t.menu(p.Name, false))
+		}
+	}
+	return events
+}
+func (t *bigSixTable) reset() {
+	t.phase = phaseWaiting
+	t.window.close()
+	t.frames = nil
+	t.multiplier.SetInt64(1)
+	for _, p := range t.players.ordered() {
+		p.bets = nil
+		p.HasBet = false
+		p.Wager = Wager{}
+	}
+}
+func (t *bigSixTable) action(name, action string) []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	p := t.players.get(name)
+	if p == nil {
+		return []Event{t.private(name, "You aren't playing Big 6.")}
+	}
+	if action == "unbet" {
+		if t.phase == phasePlaying {
+			return []Event{t.private(name, "You cannot unbet after the wheel starts, including DOUBLE respins.")}
+		}
+		if !p.HasBet {
+			return []Event{t.private(name, "Nothing to take back.")}
+		}
+		var ids []string
+		for _, b := range p.bets {
+			ids = append(ids, b.wager.ID)
+		}
+		if err := p.Wallet.PayCredits(p.Wager.Total, ids...); err != nil {
+			return []Event{t.private(name, payoutFailedMessage())}
+		}
+		total := p.Wager.Total
+		p.bets = nil
+		p.HasBet = false
+		p.Wager = Wager{}
+		return []Event{t.private(name, fmt.Sprintf("You take back %d credits.", total))}
+	}
+	if action == "spin" {
+		if t.phase == phasePlaying {
+			return []Event{t.private(name, "The wheel is already spinning.")}
+		}
+		if t.phase == phaseBetting {
+			return []Event{t.private(name, fmt.Sprintf("The shared betting round has %d ticks remaining.", t.window.timer.remaining()))}
+		}
+		if !p.HasBet {
+			return []Event{t.private(name, "Place your bets before spinning.")}
+		}
+		return []Event{t.startSpin()}
+	}
+	if events, ok := t.controlLocked(name, action); ok {
+		return events
+	}
+	return []Event{t.private(name, "Place bets, then spin. Use rules for Big 6 help.")}
+}
+func (t *bigSixTable) rebet(name string) (string, int) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	if p := t.players.get(name); p != nil && p.lastBet > 0 {
+		return p.lastSpot, p.lastBet
+	}
+	return "", t.Config.MinBet
+}
+func (t *bigSixTable) status(name string) []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	events := []Event{t.menu(name, true)}
+	if t.phase != phasePlaying && t.lastResult != nil {
+		e := t.private(name, "Last stop:")
+		e.Snapshot = t.lastResult
+		events = append(events, e)
+	}
+	return events
+}
+func (t *bigSixTable) markDisconnected(name string) []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	p := t.players.get(name)
+	if p == nil {
+		return nil
+	}
+	// Once animation reveals positions, refunds would permit selective losses.
+	// Match the casino's disconnect-forfeit convention for exposed games.
+	var events []Event
+	if p.Wallet != nil {
+		var err error
+		if p.HasBet && t.phase == phasePlaying {
+			var ids []string
+			for _, b := range p.bets {
+				ids = append(ids, b.wager.ID)
+			}
+			err = p.Wallet.PayCredits(0, ids...)
+		} else {
+			_, _, err = p.Wallet.RefundOutstanding()
+		}
+		if err != nil {
+			events = append(events, t.private(name, payoutFailedMessage()))
+		}
+	}
+	t.removeSeatLocked(name)
+	if t.players.count() == 0 {
+		t.reset()
+	}
+	return t.closeIfEmptyLocked(append(events, t.event(name+" stands up.", true)))
+}
+func (t *bigSixTable) refundAll() []Event {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	events := t.refundAllLocked()
+	t.reset()
+	return events
+}
+func (t *bigSixTable) busy(_ string) bool {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.phase == phasePlaying
+}
diff --git a/internal/casino/big_six_test.go b/internal/casino/big_six_test.go
new file mode 100644
index 0000000..cccad77
--- /dev/null
+++ b/internal/casino/big_six_test.go
@@ -0,0 +1,293 @@
+package casino
+
+import (
+	"math"
+	"math/big"
+	"math/rand"
+	"strings"
+	"testing"
+)
+
+func newBigSixTest() *bigSixTable {
+	return newBigSixTable(1, TableConfig{ID: "wheel", Game: GameBigSix}, rand.New(rand.NewSource(123)))
+}
+func forceBigSix(t *bigSixTable, spot string) []Event {
+	for i, s := range bigSixWheel {
+		if s == spot {
+			t.winningIndex = i
+			return t.settle()
+		}
+	}
+	panic("unknown test symbol")
+}
+func TestBigSixRTPAndRegistry(t *testing.T) {
+	cfg := TableConfig{ID: "wheel", Game: GameBigSix}
+	if err := cfg.Validate(); err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Normalize().BettingTicks != 25 || cfg.HelpTopic() != "big6" || newTable(1, cfg, newTestRand()) == nil {
+		t.Fatal("registration")
+	}
+	counts := map[string]int{}
+	for _, s := range bigSixWheel {
+		counts[s]++
+	}
+	if len(bigSixWheel) != 51 || counts["DOUBLE"] != 1 {
+		t.Fatal(counts)
+	}
+	for _, s := range BigSixSpots() {
+		if counts[s.Label] != s.Count {
+			t.Fatal(s)
+		}
+		if s.Pays == 0 {
+			continue
+		}
+		rtp := float64(s.Count*(s.Pays+1)) / float64(len(bigSixWheel)-2*counts["DOUBLE"])
+		if rtp < .978 || rtp > .985 || math.Abs(rtp-48.0/49) > 1e-12 {
+			t.Fatal(s, rtp)
+		}
+		if e := cfg.HouseEdge(s.Label); len(e.Parts) != 1 || math.Abs(e.Parts[0].Loss-(1-rtp)) > 1e-12 {
+			t.Fatal(e)
+		}
+	}
+	if len(cfg.HouseEdge("DOUBLE").Parts) != 0 {
+		t.Fatal("DOUBLE is not a target")
+	}
+}
+func TestBigSixMultipleBetsAndDouble(t *testing.T) {
+	table := newBigSixTest()
+	table.join("a")
+	w := &recordingWallet{testWallet: testWallet{credits: 100}}
+	table.bet("a", "$1", 10, w)
+	table.bet("a", "sword", 2, w)
+	table.bet("a", "1", 3, w)
+	if table.phase != phaseWaiting || len(w.open) != 3 {
+		t.Fatal("bet started spin or lost wager")
+	}
+	table.action("a", "spin")
+	if table.phase != phasePlaying {
+		t.Fatal("spin")
+	}
+	forceBigSix(table, "DOUBLE")
+	forceBigSix(table, "DOUBLE")
+	if table.multiplier.String() != "4" || w.paid != 0 || len(w.open) != 3 {
+		t.Fatal("DOUBLE must ride all bets without cashing out")
+	}
+	table.bet("a", "2", 1, w)
+	table.action("a", "unbet")
+	if len(w.open) != 3 || len(table.players.get("a").bets) != 3 {
+		t.Fatal("bet/unbet accepted during respin")
+	}
+	events := forceBigSix(table, "1")
+	if w.paid != 104 || len(w.open) != 0 || len(w.payStakes) != 3 {
+		t.Fatal("wrong payout/ledger", w)
+	}
+	for _, e := range events {
+		if len(e.Settlement) > 0 {
+			if len(e.Settlement) != 3 || e.Settlement[0].Stake != 10 || e.Settlement[0].Returned != 80 || e.Settlement[0].Odds != "7:1" {
+				t.Fatal(e.Settlement)
+			}
+		}
+	}
+	if table.multiplier.String() != "1" || table.phase != phaseWaiting {
+		t.Fatal("not reset")
+	}
+}
+func TestBigSixUncappedDoubleAndSafeOverflow(t *testing.T) {
+	table := newBigSixTest()
+	table.join("a")
+	w := &testWallet{credits: 10}
+	table.bet("a", "1", 1, w)
+	table.action("a", "spin")
+	for i := 0; i < 130; i++ {
+		forceBigSix(table, "DOUBLE")
+	}
+	if table.multiplier.Cmp(new(big.Int).Lsh(big.NewInt(1), 130)) != 0 {
+		t.Fatal("DOUBLE capped or wrapped")
+	}
+	events := forceBigSix(table, "1")
+	if w.paid != 0 || len(w.open) != 1 {
+		t.Fatal("overflow must not pay or consume pending stake")
+	}
+	for _, e := range events {
+		if len(e.Settlement) > 0 {
+			t.Fatal("announced unbanked payout")
+		}
+	}
+	table.refundAll()
+	if len(w.open) != 0 {
+		t.Fatal("recovery did not refund")
+	}
+}
+func TestBigSixMultiplayerClockWithoutBets(t *testing.T) {
+	table := newBigSixTest()
+	table.join("a")
+	table.join("b")
+	if table.phase != phaseBetting || table.window.timer.remaining() != 25 {
+		t.Fatal("join must open betting")
+	}
+	table.action("a", "spin")
+	for i := 0; i < 24; i++ {
+		table.tick()
+		if table.phase != phaseBetting {
+			t.Fatal("early spin", i)
+		}
+	}
+	table.tick()
+	if table.phase != phasePlaying {
+		t.Fatal("empty round did not spin")
+	}
+	forceBigSix(table, "2")
+	if table.phase != phaseBetting || table.window.timer.remaining() != 25 {
+		t.Fatal("next window")
+	}
+}
+func TestBigSixAnimationGeometryAndTiming(t *testing.T) {
+	sawLong, sawVariation := false, false
+	length := 0
+	for round := 0; round < 250; round++ {
+		table := newBigSixTest()
+		table.startSpin()
+		frames := append([]bigSixFrame(nil), table.frames...)
+		if length != 0 && length != len(frames) {
+			sawVariation = true
+		}
+		length = len(frames)
+		fast := 0
+		prevStep, prevDelay := 10, 1
+		for i, f := range frames {
+			if f.delay == 1 {
+				fast++
+			}
+			if f.delay >= 8 {
+				sawLong = true
+			}
+			if f.move > prevStep || f.delay < prevDelay {
+				t.Fatalf("not slowing: %+v", frames)
+			}
+			if f.delay == 1 && (f.move < 4 || f.move > 8) || f.delay == 2 && (f.move < 2 || f.move > 4) || f.delay == 3 && (f.move < 1 || f.move > 2) {
+				t.Fatal(frames)
+			}
+			// Only the very last click may take a long pause; everything else
+			// is capped so the wheel never crawls.
+			if i < len(frames)-1 && f.delay > 4 {
+				t.Fatalf("wait uncapped before the last click: %+v", frames)
+			}
+			prevStep, prevDelay = f.move, f.delay
+		}
+		if fast < 3 || fast > 6 {
+			t.Fatal("fast count", fast)
+		}
+		// The final approach is all single-space clicks, with an optional
+		// stationary click at the very end.
+		approach := 0
+		for i := len(frames) - 1; i >= 0 && frames[i].move <= 1; i-- {
+			approach++
+		}
+		if approach < 3 {
+			t.Fatalf("wheel must click one space at least 3 times at rest: %+v", frames)
+		}
+		if frames[len(frames)-1].move > 1 {
+			t.Fatalf("final click must stay or advance one space: %+v", frames)
+		}
+		winner := table.winningIndex
+		position := table.position
+		for i, f := range frames {
+			for wait := 1; wait < f.delay; wait++ {
+				if e := table.tick(); len(e) != 0 {
+					t.Fatal("early frame")
+				}
+			}
+			events := table.tick()
+			position = (position + f.move) % len(bigSixWheel)
+			var s *BigSixSnapshot
+			for _, e := range events {
+				if v, ok := e.Snapshot.(*BigSixSnapshot); ok {
+					s = v
+					break
+				}
+			}
+			if s == nil {
+				t.Fatal("missing frame")
+			}
+			count := 11
+			if i == len(frames)-1 {
+				count = 9
+				if position != winner {
+					t.Fatal("outcome teleport")
+				}
+			}
+			if len(s.Pockets) != count {
+				t.Fatal("strip width", s)
+			}
+			for j, p := range s.Pockets {
+				if p != bigSixWheel[(position+j-count/2+51)%51] {
+					t.Fatal("invented neighbor")
+				}
+			}
+		}
+	}
+	if !sawLong || !sawVariation {
+		t.Fatal("no suspense variation")
+	}
+}
+func TestBigSixUnbetAndDisconnect(t *testing.T) {
+	for _, spinning := range []bool{false, true} {
+		table := newBigSixTest()
+		table.join("a")
+		w := &testWallet{credits: 100}
+		table.bet("a", "1", 10, w)
+		table.bet("a", "2", 20, w)
+		if spinning {
+			table.action("a", "spin")
+			forceBigSix(table, "DOUBLE")
+		} else {
+			table.action("a", "unbet")
+			if w.paid != 30 || len(w.open) != 0 || table.players.get("a").HasBet {
+				t.Fatal("unbet")
+			}
+			table.bet("a", "1", 10, w)
+		}
+		table.markDisconnected("a")
+		if len(w.open) != 0 || table.players.count() != 0 || table.phase != phaseWaiting {
+			t.Fatal("disconnect cleanup")
+		}
+		if spinning && w.paid != 0 {
+			t.Fatal("selective refund exploit")
+		}
+	}
+}
+func TestBigSixSettlementFailureAndDeparture(t *testing.T) {
+	table := newBigSixTest()
+	table.join("a")
+	w := &failingPayoutWallet{testWallet: testWallet{credits: 100}}
+	table.bet("a", "1", 10, w)
+	table.action("a", "spin")
+	events := forceBigSix(table, "1")
+	if len(w.open) != 1 {
+		t.Fatal("failed payout consumed stake")
+	}
+	found := false
+	for _, e := range events {
+		if strings.Contains(e.Message, "pending recovery") {
+			found = true
+		}
+		if len(e.Settlement) > 0 {
+			t.Fatal("fake receipt")
+		}
+	}
+	if !found {
+		t.Fatal("missing error")
+	}
+	table.refundAll()
+	table.bet("a", "1", 1, &testWallet{credits: 10})
+	table.action("a", "leave_after")
+	table.action("a", "spin")
+	events = forceBigSix(table, "2")
+	if table.players.count() != 0 {
+		t.Fatal("queued departure")
+	}
+	if s, ok := events[0].Snapshot.(*BigSixSnapshot); !ok || len(s.Players) != 1 || s.Players[0] != "a" {
+		t.Fatal("departing player lost result visibility")
+	}
+}
diff --git a/internal/casino/blackjack.go b/internal/casino/blackjack.go
index 5656129..b5beb1e 100644
--- a/internal/casino/blackjack.go
+++ b/internal/casino/blackjack.go
@@ -112,12 +112,12 @@ func (t *blackjackTable) menuEvent(name string) Event {
 	if t.phase == blackjackPlaying || t.phase == blackjackInsurance {
 		return t.private(name, "Round in progress. You’ll join the next hand; table shows the current action.")
 	}
-	amount, desc := t.Config.MinBet, "Table minimum"
+	amount, desc, betCmd := t.Config.MinBet, "Table minimum", "bet"
 	if p := t.players.get(name); p != nil && p.lastBet > 0 {
-		amount, desc = p.lastBet, "Repeat wager"
+		amount, desc, betCmd = p.lastBet, "Repeat wager", "bet / rebet"
 	}
 	e := t.betMenuEvent(name, []MenuCommand{
-		{Command: "bet", Desc: fmt.Sprintf("%s: %d credits (also: rebet)", desc, amount)},
+		{Command: betCmd, Desc: fmt.Sprintf("%s: %d credits", desc, amount)},
 		{Command: "bet N", Desc: "Change wager; min/max accepted"},
 		{Command: "stop", Desc: "Leave; during a round, leave afterward"},
 		{Command: "table", Desc: "Check the table"},
diff --git a/internal/casino/core.go b/internal/casino/core.go
index f51dde3..3956750 100644
--- a/internal/casino/core.go
+++ b/internal/casino/core.go
@@ -187,6 +187,9 @@ func settleStakeOutcome(w Wallet, payout int, stakeIDs []string, payoutErr error
 
 // gameTitle renders a configured game name as a message heading.
 func gameTitle(game GameName) string {
+	if game == GameBigSix {
+		return "Big 6"
+	}
 	name := string(game)
 	if name == "" {
 		return "Table"
diff --git a/internal/casino/craps_ux.go b/internal/casino/craps_ux.go
index e64feb3..9538e7c 100644
--- a/internal/casino/craps_ux.go
+++ b/internal/casino/craps_ux.go
@@ -16,7 +16,7 @@ func (t *crapsTable) commands(name string) []MenuCommand {
 				// Pass is the only target, so the bare bet is a rebet.
 				if p.lastBet > 0 {
 					commands = append(commands,
-						MenuCommand{Command: "bet", Desc: fmt.Sprintf("Rebet %d on pass (also: rebet)", p.lastBet)},
+						MenuCommand{Command: "bet / rebet", Desc: fmt.Sprintf("Rebet %d on pass", p.lastBet)},
 						MenuCommand{Command: "bet N", Desc: "New amount on pass; the dice roll 3 ticks after a bet"})
 				} else {
 					commands = append(commands, MenuCommand{Command: "bet N", Desc: "Wager on pass; the dice roll 3 ticks after a bet"})
diff --git a/internal/casino/registry.go b/internal/casino/registry.go
index a27a9dd..4366bc6 100644
--- a/internal/casino/registry.go
+++ b/internal/casino/registry.go
@@ -84,6 +84,20 @@ func init() {
 			ruleText:      func(c TableConfig) string { return c.CrapsRulesText() },
 			helpTopic:     func(c TableConfig) string { return c.Craps.helpTopic() },
 		},
+		GameBigSix: {
+			houseEdge: bigSixHouseEdge,
+			validate: func(c TableConfig) error {
+				if c.BettingTicks != 0 && c.BettingTicks != 25 {
+					return fmt.Errorf("Big 6 betting_ticks must be 25")
+				}
+				return nil
+			},
+			normalize:    func(c TableConfig) TableConfig { c.BettingTicks = 25; return c },
+			hasRuleBlock: func(TableConfig) bool { return false },
+			new:          func(room int, c TableConfig, rng *rand.Rand) tableGame { return newBigSixTable(room, c, rng) },
+			ruleText:     bigSixRules,
+			helpTopic:    func(TableConfig) string { return "big6" },
+		},
 		GameRoulette: {
 			houseEdge: rouletteHouseEdge,
 			validate: func(c TableConfig) error {
diff --git a/internal/casino/table_hints.go b/internal/casino/table_hints.go
index eafb05e..5b1d86e 100644
--- a/internal/casino/table_hints.go
+++ b/internal/casino/table_hints.go
@@ -75,7 +75,7 @@ func baccaratHintCommands(t *baccaratTable, name string) []MenuCommand {
 	}
 	commands := []MenuCommand{}
 	if p != nil && p.hasLastBet() {
-		commands = append(commands, MenuCommand{Command: "bet", Desc: "Repeat your last bets"})
+		commands = append(commands, MenuCommand{Command: "bet / rebet", Desc: "Repeat your last bets"})
 	}
 	if p != nil && len(p.sides) > 0 {
 		commands = append(commands, MenuCommand{Command: "unbet", Desc: "Take back your side bets"})
diff --git a/internal/casino/table_ux_test.go b/internal/casino/table_ux_test.go
index f81d537..9589deb 100644
--- a/internal/casino/table_ux_test.go
+++ b/internal/casino/table_ux_test.go
@@ -223,7 +223,7 @@ func TestRebetMenusAndMidRoundJoin(t *testing.T) {
 	}
 	bac.bet("alice", "banker", 25, &testWallet{credits: 100})
 	menu := bac.menuEvent("alice").Menu
-	if !menu.Repeat || menu.Commands[0].Command != "bet" || !strings.Contains(menu.Commands[0].Desc, "Repeat") {
+	if !menu.Repeat || menu.Commands[0].Command != "bet / rebet" || !strings.Contains(menu.Commands[0].Desc, "Repeat") {
 		t.Fatalf("missing rebet details: %+v", menu)
 	}
 }
diff --git a/internal/casino/types.go b/internal/casino/types.go
index 570d0ac..8986dc1 100644
--- a/internal/casino/types.go
+++ b/internal/casino/types.go
@@ -20,6 +20,7 @@ const (
 	GameBlackjack  GameName = "blackjack"
 	GameBaccarat   GameName = "baccarat"
 	GameRoulette   GameName = "roulette"
+	GameBigSix     GameName = "big6"
 	GameCraps      GameName = "craps"
 )
 
diff --git a/internal/game/big_six_test.go b/internal/game/big_six_test.go
new file mode 100644
index 0000000..6a83cdf
--- /dev/null
+++ b/internal/game/big_six_test.go
@@ -0,0 +1,222 @@
+package game
+
+import (
+	"strings"
+	"testing"
+
+	"thehouseoficarus/internal/casino"
+	"thehouseoficarus/internal/color"
+)
+
+func TestBigSixRendering(t *testing.T) {
+	for _, mode := range []string{"none", "ansi16", "xterm256"} {
+		for _, unicode := range []bool{false, true} {
+			s := &casino.BigSixSnapshot{Phase: "betting", Multiplier: "1", BettingTicks: 25, MinBet: 1, MaxBet: 10000}
+			board := renderBigSixSnapshot(s, mode, unicode)
+			if mode != "none" && !strings.Contains(board, "\x1b[2m") {
+				t.Fatal("payouts must be dim")
+			}
+			if mode == "none" && strings.Contains(board, "\x1b") {
+				t.Fatal("ANSI leaked into plain display")
+			}
+			for _, text := range []string{"$1", "$2", "$5", "$10", "$20", "SWORD", "SHIELD", "DOUBLE", "pays 47:1", "Bets:"} {
+				if !strings.Contains(board, text) {
+					t.Fatalf("missing %q: %s", text, board)
+				}
+			}
+			for _, gone := range []string{"B I G", "RTP", "Place any number", "Odds are profit", "double & respin"} {
+				if strings.Contains(board, gone) {
+					t.Fatalf("stale felt text %q: %s", gone, board)
+				}
+			}
+			if unicode && !strings.ContainsAny(board, "─│┌╭") {
+				t.Fatalf("Unicode felt is still ASCII: %s", board)
+			}
+			if !unicode && strings.ContainsAny(board, "─│┌╭") {
+				t.Fatalf("ASCII felt leaked Unicode: %s", board)
+			}
+			for _, phase := range []string{"playing", "result"} {
+				s.Phase = phase
+				s.Pockets = []string{"1", "2", "5", "10", "DOUBLE", "20", "SWORD", "SHIELD", "1"}
+				if phase == "playing" {
+					s.Pockets = append(s.Pockets, "1", "2")
+				}
+				text := renderBigSixSnapshot(s, mode, unicode)
+				if strings.Count(text, "\n") < 5 {
+					t.Fatal("not a multi-line wheel", text)
+				}
+				wall := "|"
+				if unicode {
+					wall = "│"
+				}
+				// The bill outline must continue through the number row.
+				bill := wall + " $1 "
+				if phase == "result" {
+					bill = wall + " $1  " + wall
+				} else {
+					bill = wall + " $1 " + wall
+				}
+				if !strings.Contains(text, bill) {
+					t.Fatalf("number row is missing the bill walls (%q): %s", bill, text)
+				}
+				// Every rail and separator uses the same dim-yellow border ink.
+				if mode != "none" {
+					yellow := color.Render(mode, color.ColorSpec{Fg: 3, Bg: -1, Dim: true}, wall)
+					if !strings.Contains(text, yellow) {
+						t.Fatalf("wheel separators are not the yellow border color: %s", text)
+					}
+				}
+				for _, line := range strings.Split(text, "\n") {
+					if color.VisibleLen(line) > 80 {
+						t.Fatalf("frame too wide (%d): %s", color.VisibleLen(line), line)
+					}
+				}
+				pointer := "\\/"
+				if unicode {
+					pointer = "▼"
+				}
+				if !strings.Contains(text, pointer) {
+					t.Fatal("no pointer")
+				}
+				if strings.ContainsAny(text, "◆") {
+					t.Fatalf("second pointer glyph still present: %s", text)
+				}
+				if strings.Contains(text, "* * *") || strings.Contains(text, "[ STOP ]") {
+					t.Fatalf("stale wheel result art: %s", text)
+				}
+				if phase == "result" {
+					lines := strings.Split(strings.TrimRight(text, " \n"), "\n")
+					if !strings.Contains(lines[len(lines)-1], "WINNER") {
+						t.Fatalf("WINNER must print below the entire wheel: %s", text)
+					}
+				}
+			}
+			for _, line := range strings.Split(board, "\n") {
+				if color.VisibleLen(line) > 80 {
+					t.Fatalf("felt too wide (%d): %s", color.VisibleLen(line), line)
+				}
+				if strings.Contains(line, "pays 23:1") && mode != "none" {
+					// The box walls stay bold; only the payout text is dim.
+					if !strings.Contains(line, "\x1b[1m") || !strings.Contains(line, "\x1b[2m") {
+						t.Fatalf("pays row walls/text have the wrong weight: %q", line)
+					}
+				}
+			}
+		}
+	}
+}
+
+func TestBigSixUnicodeArtwork(t *testing.T) {
+	// Check the rendered cells, not just the source art: independent row
+	// centering must not misalign the blade or disconnect shield corners.
+	for _, tt := range []struct {
+		label string
+		want  []string
+	}{
+		{"SWORD", []string{
+			"│           ▲            │",
+			"│           ║            │",
+			"│           ║            │",
+			"│        ╘══╬══╛         │",
+			"│           ╩            │",
+		}},
+		{"SHIELD", []string{
+			"│       ╭───────╮        │",
+			"│       │   ◇   │        │",
+			"│       ╰╮     ╭╯        │",
+			"│        ╰╮   ╭╯         │",
+			"│         ╰───╯          │",
+		}},
+	} {
+		t.Run(tt.label, func(t *testing.T) {
+			panel := bigSixPanel(casino.BigSixSpot{Label: tt.label, Pays: 47}, 24, "none", true)
+			if got, want := strings.Join(panel[2:7], "\n"), strings.Join(tt.want, "\n"); got != want {
+				t.Fatalf("table artwork:\n%s\nwant:\n%s", got, want)
+			}
+		})
+	}
+
+	s := &casino.BigSixSnapshot{Phase: "result", Pockets: []string{"SWORD", "SHIELD"}}
+	lines := strings.Split(renderBigSixSnapshot(s, "none", true), "\n")
+	want := strings.Join([]string{
+		"│   ▲   │╭─────╮│",
+		"│ ╘═╬═╛ │╰╮ ◇ ╭╯│",
+		"│   ╩   │ ╰───╯ │",
+		"│ SWORD │SHIELD │",
+	}, "\n")
+	if got := strings.Join(lines[2:6], "\n"); got != want {
+		t.Fatalf("wheel artwork:\n%s\nwant:\n%s", got, want)
+	}
+}
+
+func TestBigSixSpinAbbreviation(t *testing.T) {
+	// "sp" is the blackjack split shorthand. Split is not a Big 6 command, so
+	// the abbreviation must instead match the only relevant verb: spin.
+	g, sess, _ := houseEdgeGame(t, "name: Wheel\ncasino_tables:\n  - id: big6\n    game: big6\n")
+	g.queue = NewCommandQueue()
+	g.executePlay(sess, []string{"big6"}, "play big6")
+	g.executeBet(sess, []string{"2", "on", "1"}, "bet 2 on 1")
+	if got, ok := g.casinoAbbreviation(sess, "sp"); !ok || got != "spin" {
+		t.Fatalf("sp at Big 6 resolved to %q (ok=%v), want spin", got, ok)
+	}
+	// Prefixes of other games' verbs (split, roll, hit, double) must not
+	// resolve at this table.
+	for _, input := range []string{"spl", "spli", "ro", "hi", "dd"} {
+		if got, ok := g.casinoAbbreviation(sess, input); ok {
+			t.Fatalf("Big 6 %q unexpectedly abbreviated to %q", input, got)
+		}
+	}
+	g.handleGameCommand(sess, "sp")
+	if qc, ok := g.queue.PeekActive("alice"); !ok || qc.Command != "spin" {
+		t.Fatalf("sp queued %+v (ok=%v), want spin", qc, ok)
+	}
+}
+
+func TestBigSixCommandsAndVisibility(t *testing.T) {
+	g, sess, conn := houseEdgeGame(t, "name: Wheel\ncasino_tables:\n  - id: big6\n    game: big6\n")
+	g.executePlay(sess, []string{"big6"}, "play big6")
+	table, playing := g.Casino.Participation(sess.Player.Name)
+	if !playing || table == nil {
+		t.Fatal("join failed", string(conn.data))
+	}
+	for _, target := range []string{"1", "$20", "sword", "shield"} {
+		g.executeBet(sess, []string{"2", "on", target}, "bet 2 on "+target)
+	}
+	if sess.Player.Credits != 92 || table.State() != "waiting" {
+		t.Fatal("bet/spin conflated", sess.Player.Credits, table.State(), string(conn.data))
+	}
+	conn.data = nil
+	g.executeList(sess, nil, "list")
+	if !strings.Contains(string(conn.data), "SWORD") || !strings.Contains(string(conn.data), "47:1") {
+		t.Fatal("list missing targets", string(conn.data))
+	}
+	conn.data = nil
+	g.executeTableStatus(sess, nil, "table")
+	if !strings.Contains(string(conn.data), "Bets:") {
+		t.Fatal("table not routed", string(conn.data))
+	}
+	conn.data = nil
+	g.executeRules(sess, nil, "rules")
+	if !strings.Contains(string(conn.data), "48/49") {
+		t.Fatal("help not routed", string(conn.data))
+	}
+	g.executeSpin(sess, nil, "spin")
+	if table.State() != "playing" || sess.Player.Credits != 92 {
+		t.Fatal("spin rebet/debit", string(conn.data))
+	}
+	g.executeSpin(sess, nil, "spin")
+	if sess.Player.Credits != 92 {
+		t.Fatal("second spin debited")
+	}
+	beforePrompt := len(conn.data)
+	g.writePrompt(sess)
+	if len(conn.data) != beforePrompt {
+		t.Fatal("prompt interrupted wheel")
+	}
+	if !table.Busy(sess.Player.Name) {
+		t.Fatal("animation prompt handling")
+	}
+	if !g.seesCasinoDetails(sess, casino.Event{RoomID: 1, TableID: "gone", Snapshot: &casino.BigSixSnapshot{Players: []string{sess.Player.Name}}}) {
+		t.Fatal("departing seat cannot see final frame")
+	}
+}
diff --git a/internal/game/blackjack_rules.go b/internal/game/blackjack_rules.go
index 7cea977..9e36466 100644
--- a/internal/game/blackjack_rules.go
+++ b/internal/game/blackjack_rules.go
@@ -22,6 +22,10 @@ func (g *Game) lookCrapsTable(sess *net.Session, target string) bool {
 	return g.lookCasinoTable(sess, target, casino.GameCraps)
 }
 
+func (g *Game) lookBigSixTable(sess *net.Session, target string) bool {
+	return g.lookCasinoTable(sess, target, casino.GameBigSix)
+}
+
 func (g *Game) lookRouletteTable(sess *net.Session, target string) bool {
 	return g.lookCasinoTable(sess, target, casino.GameRoulette)
 }
diff --git a/internal/game/casino.go b/internal/game/casino.go
index 8f18614..6dce0bd 100644
--- a/internal/game/casino.go
+++ b/internal/game/casino.go
@@ -380,6 +380,21 @@ func (g *Game) startCasinoGame(sess *net.Session, p *player.Player, gameName str
 	g.emitCasinoEvents(events)
 }
 
+// Keep slots' spin-as-bet behavior, while Big 6 spins already committed wagers.
+func (g *Game) executeSpin(sess *net.Session, args []string, rawInput string) {
+	if sess.Player != nil {
+		if table, playing := g.Casino.Participation(sess.Player.Name); playing && table != nil && table.Config.Game == casino.GameBigSix {
+			if len(args) != 0 {
+				sess.WriteLine("Use spin after placing your bets.")
+				return
+			}
+			g.executeTableAction(sess, "spin")
+			return
+		}
+	}
+	g.executeBet(sess, args, rawInput)
+}
+
 func (g *Game) executeBet(sess *net.Session, args []string, rawInput string) {
 	p := sess.Player
 	if p == nil {
@@ -537,7 +552,13 @@ func (g *Game) rouletteSpinning(sess *net.Session) bool {
 		return false
 	}
 	table, playing := g.Casino.Participation(sess.Player.Name)
-	if !playing || table == nil || table.Config.Game != casino.GameRoulette {
+	if !playing || table == nil {
+		return false
+	}
+	if table.Config.Game == casino.GameBigSix {
+		return table.Busy(sess.Player.Name)
+	}
+	if table.Config.Game != casino.GameRoulette {
 		return false
 	}
 	s, ok := table.Board(sess.Player.Name).(*casino.RouletteSnapshot)
@@ -677,8 +698,8 @@ func (g *Game) casinoHintsVisible(sess *net.Session, menu *casino.MenuView) bool
 	}
 }
 
-// casinoBoardReminder splits a persistent-board menu (craps, roulette, video
-// poker, Pai Gow) so its instructions print under the board they describe.
+// casinoBoardReminder splits a persistent-board menu (craps, roulette, Big 6,
+// video poker, Pai Gow) so its instructions print under the board they describe.
 // Every other game, and compact displays, keep their menu in one block.
 func (g *Game) casinoBoardReminder(sess *net.Session, category string, menu *casino.MenuView, snapshot casino.Snapshot, message string) (reminder string, ok bool) {
 	if category != "casino_menu" || menu == nil || sess.Player == nil {
@@ -687,11 +708,13 @@ func (g *Game) casinoBoardReminder(sess *net.Session, category string, menu *cas
 	_, isCraps := snapshot.(*casino.CrapsSnapshot)
 	_, isPoker := snapshot.(*casino.VideoPokerSnapshot)
 	_, isPaiGow := snapshot.(*casino.PaiGowSnapshot)
+	b, isBigSix := snapshot.(*casino.BigSixSnapshot)
+	isBigSix = isBigSix && b.Phase != "playing" && b.Phase != "result"
 	s, isRoulette := snapshot.(*casino.RouletteSnapshot)
-	if !isPoker && !isCraps && !isPaiGow && (!isRoulette || s.Phase == "playing" || s.Phase == "result") {
+	if !isPoker && !isCraps && !isPaiGow && !isBigSix && (!isRoulette || s.Phase == "playing" || s.Phase == "result") {
 		return "", false
 	}
-	if !isPoker && !isCraps && !isPaiGow && sess.Player.OptionString("casino_display") == "compact" && (menu.Repeat || !menu.ShowBalance) {
+	if !isPoker && !isCraps && !isPaiGow && !isBigSix && sess.Player.OptionString("casino_display") == "compact" && (menu.Repeat || !menu.ShowBalance) {
 		// The compact reminder is already a short block; leave it intact.
 		return "", false
 	}
@@ -780,6 +803,8 @@ func (g *Game) renderCasinoSnapshot(sess *net.Session, snapshot casino.Snapshot)
 		return renderVideoPoker(s, mode, unicode, size, sess.Player.OptionString("card_style"), g.CardArt)
 	case *casino.CrapsSnapshot:
 		return renderCrapsSnapshot(s, mode, unicode, sess.Player.OptionString("card_style"))
+	case *casino.BigSixSnapshot:
+		return renderBigSixSnapshot(s, mode, unicode)
 	case *casino.RouletteSnapshot:
 		return renderRouletteSnapshot(s, mode, unicode, size)
 	case *casino.SlotSnapshot:
diff --git a/internal/game/casino_ux.go b/internal/game/casino_ux.go
index e44da54..bc1906f 100644
--- a/internal/game/casino_ux.go
+++ b/internal/game/casino_ux.go
@@ -66,6 +66,8 @@ func resolveCasinoChoice(choices []casinoChoice, input string) (casinoChoice, bo
 func casinoTableAliases(cfg casino.TableConfig) []string {
 	names := []string{string(cfg.Game)}
 	switch cfg.Game {
+	case casino.GameBigSix:
+		names = append(names, "big-six", "big_six", "big six", "big 6")
 	case casino.GameBlackjack:
 		names = append(names, "bj")
 	case casino.GameBaccarat:
@@ -235,6 +237,12 @@ func (g *Game) seesCasinoDetails(sess *net.Session, event casino.Event) bool {
 				return true
 			}
 		}
+	case *casino.BigSixSnapshot:
+		for _, name := range s.Players {
+			if name == sess.Player.Name {
+				return true
+			}
+		}
 	case *casino.RouletteSnapshot:
 		for _, name := range s.Players {
 			if name == sess.Player.Name {
diff --git a/internal/game/casino_ux_test.go b/internal/game/casino_ux_test.go
index c83db27..423469c 100644
--- a/internal/game/casino_ux_test.go
+++ b/internal/game/casino_ux_test.go
@@ -93,23 +93,64 @@ func TestCasinoCommandAbbreviations(t *testing.T) {
 	}
 	g.executePlay(sess, []string{"bj"}, "play bj")
 	for input, want := range map[string]string{
-		"b": "bet", "be": "bet", "spl": "split", "su": "surrender",
-		"ins": "insurance", "ro": "roll", "wa": "watch", "ta": "table",
-		"li": "list", "ga": "game",
+		"b": "bet", "be": "bet", "spl": "split", "sp": "split", "su": "surrender",
+		"ins": "insurance", "wa": "watch", "ta": "table",
+		"li": "list", "ga": "game", "sto": "stop", "ru": "rules",
+		// The terse aliases resolve only because their verb is a blackjack verb.
+		"h": "hit", "st": "stand", "dd": "double",
 	} {
 		got, ok := g.casinoAbbreviation(sess, input)
 		if !ok || got != want {
 			t.Fatalf("%q resolved to %q (ok=%v), want %q", input, got, ok, want)
 		}
 	}
-	// stop and rules are full-word only, and movement keeps its own keys.
-	for _, input := range []string{"sto", "r", "ru", "n", "s"} {
+	// No other game's verbs leak into a blackjack table.
+	for _, input := range []string{"ro", "rol", "ra", "au", "dr", "pa", "ha", "ho"} {
+		if got, ok := g.casinoAbbreviation(sess, input); ok {
+			t.Fatalf("blackjack %q unexpectedly abbreviated to %q", input, got)
+		}
+	}
+	// Exact commands keep their meaning: movement, info, and whole words that
+	// are already real commands.
+	for _, input := range []string{"n", "s", "e", "w", "i", "l", "hit"} {
 		if got, ok := g.casinoAbbreviation(sess, input); ok {
 			t.Fatalf("%q unexpectedly abbreviated to %q", input, got)
 		}
 	}
 }
 
+func TestCasinoAbbreviationsAreGameScoped(t *testing.T) {
+	// Baccarat has neither split nor spin, so "sp" matches nothing there.
+	g, sess, _ := uxCasinoGame(t)
+	g.executePlay(sess, []string{"bac"}, "play bac")
+	for _, input := range []string{"sp", "spl", "ro", "au"} {
+		if got, ok := g.casinoAbbreviation(sess, input); ok {
+			t.Fatalf("baccarat %q unexpectedly abbreviated to %q", input, got)
+		}
+	}
+	if got, ok := g.casinoAbbreviation(sess, "be"); !ok || got != "bet" {
+		t.Fatalf("baccarat be resolved to %q (ok=%v), want bet", got, ok)
+	}
+
+	// Craps owns roll/autoroll; a blackjack table must not resolve them.
+	g2, sess2, _ := casinoCrapsGame(t, "name: Pit\ncasino_tables:\n  - id: cr\n    game: craps\n")
+	g2.executePlay(sess2, []string{"craps"}, "play craps")
+	if got, ok := g2.casinoAbbreviation(sess2, "ro"); !ok || got != "roll" {
+		t.Fatalf("craps ro resolved to %q (ok=%v), want roll", got, ok)
+	}
+	if got, ok := g2.casinoAbbreviation(sess2, "rol"); !ok || got != "roll" {
+		t.Fatalf("craps rol resolved to %q (ok=%v), want roll", got, ok)
+	}
+	if got, ok := g2.casinoAbbreviation(sess2, "au"); !ok || got != "autoroll" {
+		t.Fatalf("craps au resolved to %q (ok=%v), want autoroll", got, ok)
+	}
+	for _, input := range []string{"sp", "spl", "ins", "su"} {
+		if got, ok := g2.casinoAbbreviation(sess2, input); ok {
+			t.Fatalf("craps %q unexpectedly abbreviated to %q", input, got)
+		}
+	}
+}
+
 func TestAbbreviatedCasinoCommandReachesQueue(t *testing.T) {
 	g, sess, _ := uxCasinoGame(t)
 	g.queue = NewCommandQueue()
diff --git a/internal/game/cmd_registry.go b/internal/game/cmd_registry.go
index 710dd92..5b60118 100644
--- a/internal/game/cmd_registry.go
+++ b/internal/game/cmd_registry.go
@@ -70,7 +70,7 @@ var commandRegistry = map[string]commandDef{
 	"dd":            {func(g *Game, s *net.Session, _ []string, _ string) { g.executeTableAction(s, "double") }, ClassActive},
 	"sp":            {func(g *Game, s *net.Session, _ []string, _ string) { g.executeTableAction(s, "split") }, ClassActive},
 	"bet":           {(*Game).executeBet, ClassActive},
-	"spin":          {(*Game).executeBet, ClassActive},
+	"spin":          {(*Game).executeSpin, ClassActive},
 	"autobet":       {(*Game).executeAutoBet, ClassActive},
 	"autospin":      {(*Game).executeAutoBet, ClassActive},
 	"hit":           {func(g *Game, s *net.Session, _ []string, _ string) { g.executeTableAction(s, "hit") }, ClassActive},
@@ -240,35 +240,96 @@ func classifyCommand(cmd string) CommandClass {
 	return ClassUnknown
 }
 
-// casinoShortVerbs are the casino verbs a seated player may abbreviate to an
-// unambiguous prefix. "stop" and "rules" are deliberately absent: their
-// prefixes (st, r, ru) would otherwise shadow stand and movement, so those two
-// commands must be typed in full.
-var casinoShortVerbs = []string{
-	"bet", "deal", "draw", "hold", "paytable", "denom", "denomination",
-	"hands", "feature", "game", "roll", "autoroll", "unbet", "table",
-	"status", "list", "watch", "decline", "hit", "stand",
-	"double", "split", "insurance", "surrender", "spin", "autobet",
-	"autospin", "rebet",
+// casinoCommonVerbs are the generic controls a seated player may abbreviate
+// at any casino game; they are not tied to one game's rules.
+var casinoCommonVerbs = []string{"watch", "game", "table", "list", "stop", "rules"}
+
+// casinoVerbsByGame scopes the rest of the abbreviable verbs to the game the
+// player is actually in. A prefix can therefore never match another game's
+// command: "sp" is split at a blackjack table, but spin at a Big 6 wheel,
+// because "split" is not a Big 6 verb and "spin" is not a blackjack verb.
+var casinoVerbsByGame = map[casino.GameName][]string{
+	casino.GameBlackjack:  {"bet", "rebet", "unbet", "hit", "stand", "double", "split", "insurance", "surrender", "decline"},
+	casino.GameBaccarat:   {"bet", "rebet", "unbet"},
+	casino.GameRoulette:   {"bet", "rebet", "unbet"},
+	casino.GameCraps:      {"bet", "rebet", "unbet", "roll", "autoroll"},
+	casino.GamePaiGow:     {"bet", "rebet", "unbet"},
+	casino.GameVideoPoker: {"bet", "deal", "draw", "hold", "paytable", "denom", "denomination", "hands", "feature"},
+	casino.GameSlots:      {"bet", "spin", "autospin", "autobet"},
+	casino.GameBigSix:     {"bet", "rebet", "unbet", "spin"},
+}
+
+// casinoShortAliases maps the registry's terse aliases onto the verb they
+// stand for. An alias only applies when its verb belongs to the current game;
+// otherwise the letters are re-read as a fresh prefix, so "sp" is split at a
+// blackjack table and spin at a Big 6 wheel.
+var casinoShortAliases = map[string]string{
+	"h": "hit", "st": "stand", "dd": "double", "sp": "split",
+}
+
+// casinoVerbsFor returns the game-scoped verb vocabulary for a seated player,
+// or nil when they are not in a casino game.
+func (g *Game) casinoVerbsFor(name string) []string {
+	if g.Casino == nil {
+		return nil
+	}
+	table, playing := g.Casino.Participation(name)
+	if !playing {
+		return nil
+	}
+	var game casino.GameName
+	switch {
+	case table != nil:
+		game = table.Config.Game
+	default:
+		machine, ok := g.Casino.MachineFor(name)
+		if !ok {
+			return nil
+		}
+		game = machine.Config.Game
+	}
+	verbs := append([]string(nil), casinoCommonVerbs...)
+	return append(verbs, casinoVerbsByGame[game]...)
 }
 
-// casinoAbbreviation resolves a seated casino player's unambiguous command
-// prefix to its full verb. An exact command (including the h/st/dd/sp aliases
-// and video poker's d) always wins, so a prefix never shadows a real command;
-// an ambiguous prefix resolves to nothing and falls through unchanged.
+// casinoAbbreviation resolves a seated casino player's partial command to the
+// closest verb that is actually relevant to the game they are in. Exact
+// commands always win, so movement, look and the game's own real verbs are
+// never shadowed; a short alias applies only when its verb belongs to this
+// game; an ambiguous prefix resolves to nothing and falls through unchanged.
 func (g *Game) casinoAbbreviation(sess *net.Session, cmd string) (string, bool) {
-	if sess == nil || sess.Player == nil || cmd == "" || !g.inCasinoGame(sess.Player.Name) {
+	if sess == nil || sess.Player == nil || cmd == "" {
+		return "", false
+	}
+	verbs := g.casinoVerbsFor(sess.Player.Name)
+	if len(verbs) == 0 {
 		return "", false
 	}
-	if _, ok := commandRegistry[cmd]; ok {
+	// A real casino verb needs no abbreviation: the registry dispatches it.
+	for _, verb := range verbs {
+		if verb == cmd {
+			return "", false
+		}
+	}
+	if target, ok := casinoShortAliases[cmd]; ok {
+		for _, verb := range verbs {
+			if verb == target {
+				return target, true
+			}
+		}
+		// The alias names another game's verb: fall through and read the
+		// letters as a prefix of this game's vocabulary instead.
+	} else if _, ok := commandRegistry[cmd]; ok {
+		// Any other real command (movement, look, inventory, ...) wins over a
+		// casino prefix.
 		return "", false
 	}
 	match := ""
-	for _, verb := range casinoShortVerbs {
+	for _, verb := range verbs {
 		if !strings.HasPrefix(verb, cmd) {
 			continue
 		}
-		if match != "" {
+		if match != "" && match != verb {
 			return "", false
 		}
 		match = verb
diff --git a/internal/game/core_login_char.go b/internal/game/core_login_char.go
index 41e25b8..479e397 100644
--- a/internal/game/core_login_char.go
+++ b/internal/game/core_login_char.go
@@ -111,6 +111,10 @@ func (g *Game) connectCharacter(sess *net.Session, name string) {
 		g.showMenu(sess)
 		return
 	}
+	// Log the disk state before identity backfill, missing-room rescue, or
+	// recording this login's visit can change it. Paired with shutdown saves,
+	// this distinguishes lost saves from loading a different/older file.
+	log.Printf("character loaded: %s room=%d explored=%d file=%s", p.Name, p.RoomID, p.Stats.RoomsVisited.Len(), g.AccountStore.CharPath(name))
 	g.adoptCharacterIdentity(p, sess.Account.Name)
 
 	if g.Hub != nil {
diff --git a/internal/game/game.go b/internal/game/game.go
index e5192c0..a3a9684 100644
--- a/internal/game/game.go
+++ b/internal/game/game.go
@@ -343,8 +343,13 @@ func (g *Game) saveAllOnlineCharacters() error {
 		if p := sess.Player; p != nil {
 			g.restoreGodPlayer(p)
 			g.persistLockedOnDisconnect(p)
-			if err := g.AccountStore.SaveCharacter(p); err != nil && firstErr == nil {
-				firstErr = fmt.Errorf("save %s: %w", p.Name, err)
+			if err := g.AccountStore.SaveCharacter(p); err != nil {
+				if firstErr == nil {
+					firstErr = fmt.Errorf("save %s: %w", p.Name, err)
+				}
+				log.Printf("shutdown: character save failed: %s: %v", p.Name, err)
+			} else {
+				log.Printf("shutdown: character saved: %s room=%d explored=%d file=%s", p.Name, p.RoomID, p.Stats.RoomsVisited.Len(), g.AccountStore.CharPath(p.Name))
 			}
 		}
 	}
@@ -619,9 +624,10 @@ func (g *Game) handleGameCommand(sess *net.Session, input string) {
 	}
 	cmd := parts[0]
 
-	// Seated casino players may shorten any casino verb to an unambiguous
-	// prefix (b 1000 -> bet 1000). Exact commands always win, so movement and
-	// the existing short aliases are never shadowed.
+	// Seated casino players may shorten any of their game's verbs to an
+	// unambiguous prefix (b 1000 -> bet 1000, sp -> spin at Big 6). Only the
+	// current game's vocabulary is considered, and exact commands still win, so
+	// movement and non-casino commands are never shadowed.
 	if canon, ok := g.casinoAbbreviation(sess, cmd); ok {
 		cmd = canon
 		parts[0] = canon
diff --git a/internal/game/hardening_shutdown_save_error_test.go b/internal/game/hardening_shutdown_save_error_test.go
index c75f6fc..5842f9b 100644
--- a/internal/game/hardening_shutdown_save_error_test.go
+++ b/internal/game/hardening_shutdown_save_error_test.go
@@ -7,10 +7,59 @@ package game
 import (
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 	"testing"
+	"time"
+
+	"thehouseoficarus/internal/player"
 )
 
+func TestShutdownPreservesOnlineLocationAndExploration(t *testing.T) {
+	h := newHarness(t)
+	h.seedAccount("alice")
+	p := h.seedCharacter("alice", "alice")
+	p.RoomID = 6101
+	p.Stats.RecordRoomVisit(6101)
+	if err := h.g.AccountStore.SaveCharacter(p); err != nil {
+		t.Fatal(err)
+	}
+	sess, _ := h.connect("alice")
+	wantRooms := []int{6101, 6182, 6183, 6199}
+	h.g.RunOnOwner(func() {
+		sess.Player.RoomID = 6199
+		for _, id := range wantRooms {
+			sess.Player.Stats.RecordRoomVisit(id)
+		}
+	})
+	// Deliberately leave disk at the older state. The signal shutdown path
+	// must persist the connected character before closing the transport,
+	// without requiring the player to quit or disconnect first.
+	var saved *player.Player
+	var loadErr error
+	h.g.SetTransportStop(func() {
+		saved, loadErr = player.NewAccountStore(h.dir).LoadCharacter("alice")
+	})
+	h.g.RequestShutdown("signal")
+	select {
+	case <-h.g.ShutdownDone():
+	case <-time.After(5 * time.Second):
+		t.Fatal("shutdown did not finish")
+	}
+	if err := h.g.ShutdownSaveError(); err != nil {
+		t.Fatal(err)
+	}
+	if loadErr != nil {
+		t.Fatal(loadErr)
+	}
+	if saved == nil {
+		t.Fatal("transport stop was not called")
+	}
+	if saved.RoomID != 6199 || !reflect.DeepEqual(saved.Stats.RoomsVisited.Keys(), wantRooms) {
+		t.Fatalf("shutdown lost progress: room=%d explored=%v", saved.RoomID, saved.Stats.RoomsVisited.Keys())
+	}
+}
+
 // TestShutdownSaveErrorReportsFailedFinalSave makes the character save fail
 // (the character file is replaced by a directory, so the atomic replace cannot
 // land) and requires the shutdown sequence to record the failure on the Game.
diff --git a/internal/game/look_casino.go b/internal/game/look_casino.go
index 8d2b5c3..ec9ab61 100644
--- a/internal/game/look_casino.go
+++ b/internal/game/look_casino.go
@@ -83,7 +83,7 @@ func (g *Game) renderCasinoTableDetails(sess *net.Session, cfg casino.TableConfi
 		fmt.Sprintf("  Seated   %s", seated),
 	}
 	switch cfg.Game {
-	case casino.GameRoulette:
+	case casino.GameRoulette, casino.GameBigSix:
 		// Look, like sitting down and the table command, shows the live
 		// wheel: tracker, racetrack, and betting layout.
 		if rendered := strings.TrimRight(g.renderCasinoSnapshot(sess, table.Board(sess.Player.Name)), "\n"); rendered != "" {
diff --git a/internal/game/look_target.go b/internal/game/look_target.go
index d296b35..9065ccc 100644
--- a/internal/game/look_target.go
+++ b/internal/game/look_target.go
@@ -47,7 +47,7 @@ func (g *Game) doLookTarget(sess *net.Session, input string) {
 		return
 	}
 
-	if g.lookBlackjackTable(sess, lower) || g.lookBaccaratTable(sess, lower) || g.lookRouletteTable(sess, lower) || g.lookCrapsTable(sess, lower) || g.lookPaiGowTable(sess, lower) || g.lookVideoPokerCabinet(sess, lower) {
+	if g.lookBigSixTable(sess, lower) || g.lookBlackjackTable(sess, lower) || g.lookBaccaratTable(sess, lower) || g.lookRouletteTable(sess, lower) || g.lookCrapsTable(sess, lower) || g.lookPaiGowTable(sess, lower) || g.lookVideoPokerCabinet(sess, lower) {
 		return
 	}
 
diff --git a/internal/game/render_big_six.go b/internal/game/render_big_six.go
new file mode 100644
index 0000000..19579f0
--- /dev/null
+++ b/internal/game/render_big_six.go
@@ -0,0 +1,209 @@
+package game
+
+import (
+	"fmt"
+	"strings"
+
+	"thehouseoficarus/internal/casino"
+	"thehouseoficarus/internal/color"
+)
+
+func bigSixInk(mode, label, text string, dim bool) string {
+	fg := 2
+	switch label {
+	case "2":
+		fg = 6
+	case "5":
+		fg = 4
+	case "10":
+		fg = 5
+	case "20":
+		fg = 3
+	case "SWORD":
+		fg = 15
+	case "SHIELD":
+		fg = 6
+	case "DOUBLE":
+		fg = 11
+	}
+	return color.Render(mode, color.ColorSpec{Fg: fg, Bg: -1, Bold: !dim, Dim: dim}, text)
+}
+func bigSixLabel(s string) string {
+	if s == "SWORD" || s == "SHIELD" || s == "DOUBLE" {
+		return s
+	}
+	return "$" + s
+}
+
+func bigSixPanel(spot casino.BigSixSpot, width int, mode string, unicode bool) []string {
+	b := rouletteBorders(unicode)
+	label := bigSixLabel(spot.Label)
+	art := []string{"$             $", ".--------.", "|" + rouletteCenter(label, 8) + "|", "'--------'", "$             $"}
+	if unicode {
+		art = []string{"$             $", "╭────────╮", "│" + rouletteCenter(label, 8) + "│", "╰────────╯", "$             $"}
+	}
+	switch spot.Label {
+	case "SWORD":
+		// Two full blade rows below the tip; the guard sits just above the grip.
+		art = []string{"/\\", "||", "||", "===++===", "()"}
+		if unicode {
+			art = []string{"▲", "║", "║", "╘══╬══╛", "╩"}
+		}
+	case "SHIELD":
+		art = []string{".--------.", "|   /\\   |", "|   \\/   |", "\\        /", "'------'"}
+		if unicode {
+			// Keep a fixed-width canvas: centering each tapered row separately
+			// would shift the corners apart and break the shield's outline.
+			art = []string{"╭───────╮", "│   ◇   │", "╰╮     ╭╯", " ╰╮   ╭╯ ", "  ╰───╯  "}
+		}
+	}
+	lines := []string{b.tl + strings.Repeat(b.h, width) + b.tr, b.v + rouletteCenter(label, width) + b.v}
+	for _, a := range art {
+		lines = append(lines, b.v+rouletteCenter(a, width)+b.v)
+	}
+	lines = append(lines, b.bl+strings.Repeat(b.h, width)+b.br)
+	// The payout text is dim, but its box walls keep the same bold weight as
+	// the rest of the panel; otherwise the row's verticals look thin.
+	wall := bigSixInk(mode, spot.Label, b.v, false)
+	oddsLine := wall + bigSixInk(mode, spot.Label, rouletteCenter(fmt.Sprintf("pays %d:1", spot.Pays), width), true) + wall
+	lines = append(lines[:len(lines)-1], oddsLine, lines[len(lines)-1])
+	for i := range lines {
+		if i == len(lines)-2 {
+			continue // oddsLine is already colored: bold walls, dim payout
+		}
+		lines[i] = bigSixInk(mode, spot.Label, lines[i], false)
+	}
+	return lines
+}
+
+// Self-contained scrollback art, always within 80 columns. The last two
+// betting panels expand into the space formerly occupied by DOUBLE; DOUBLE
+// is an automatic feature, advertised in a shallow full-width banner instead.
+func renderBigSixSnapshot(s *casino.BigSixSnapshot, mode string, unicode bool) string {
+	if len(s.Pockets) > 0 {
+		return renderBigSixStrip(s, mode, unicode)
+	}
+	if s.Phase == "playing" {
+		return "Big 6 wheel spinning | live stakes " + s.Multiplier + "x"
+	}
+	var out strings.Builder
+	spots := casino.BigSixSpots()
+	for _, row := range [][]casino.BigSixSpot{spots[:4], spots[4:7]} {
+		var panels [][]string
+		for _, spot := range row {
+			width := 15
+			if spot.Label == "SWORD" || spot.Label == "SHIELD" {
+				width = 24
+			}
+			panels = append(panels, bigSixPanel(spot, width, mode, unicode))
+		}
+		for line := range panels[0] {
+			out.WriteString("  ")
+			for col, panel := range panels {
+				if col > 0 {
+					out.WriteByte(' ')
+				}
+				out.WriteString(panel[line])
+			}
+			out.WriteByte('\n')
+		}
+	}
+	b := rouletteBorders(unicode)
+	const bannerWidth = 69 // 71 columns including borders, like both betting rows.
+	banner := []string{
+		b.tl + strings.Repeat(b.h, bannerWidth) + b.tr,
+		b.v + rouletteCenter("DOUBLE", bannerWidth) + b.v,
+		b.v + rouletteCenter("Every live bet doubles and the wheel spins again", bannerWidth) + b.v,
+		b.v + rouletteCenter("Double again. And again. No cap.", bannerWidth) + b.v,
+		b.bl + strings.Repeat(b.h, bannerWidth) + b.br,
+	}
+	for _, line := range banner {
+		out.WriteString("  " + bigSixInk(mode, "DOUBLE", line, false) + "\n")
+	}
+	fmt.Fprintf(&out, "  Bets: %s", betLimitsText(s.MinBet, s.MaxBet))
+	return out.String()
+}
+
+func renderBigSixStrip(s *casino.BigSixSnapshot, mode string, unicode bool) string {
+	result := s.Phase == "result"
+	width := 6
+	if result {
+		width = 7
+	}
+	n := len(s.Pockets)
+	center := n / 2
+	pointer := 1 + center*(width+1) + width/2
+	b := rouletteBorders(unicode)
+	wall := "|"
+	if unicode {
+		wall = "│"
+	}
+	// Every rail and separator on the wheel uses the same dim-yellow border
+	// ink; the per-pocket colors paint only the interiors.
+	borderInk := func(text string) string { return bigSixInk(mode, "20", text, true) }
+	var out strings.Builder
+	tip := "\\/"
+	if unicode {
+		tip = "▼"
+	}
+	// No leading/trailing newline: WriteLine supplies the sole frame separator.
+	out.WriteString(strings.Repeat(" ", pointer) + bigSixInk(mode, "DOUBLE", tip, false) + "\n")
+	top := b.tl + strings.Repeat(strings.Repeat(b.h, width)+b.teeTop, n-1) + strings.Repeat(b.h, width) + b.tr
+	bottom := b.bl + strings.Repeat(strings.Repeat(b.h, width)+b.teeBottom, n-1) + strings.Repeat(b.h, width) + b.br
+	out.WriteString(borderInk(top) + "\n")
+	rows := 3
+	if result {
+		rows = 4
+	}
+	for row := 0; row < rows; row++ {
+		out.WriteString(borderInk(b.v))
+		for i, pocket := range s.Pockets {
+			label := bigSixLabel(pocket)
+			var art []string
+			if result {
+				// The bill's side walls continue through the number row so the
+				// outline stays complete once the wheel stops.
+				art = []string{".-----.", "|  $  |", wall + rouletteCenter(label, 5) + wall, "'-----'"}
+				if unicode {
+					art = []string{"╭─────╮", "│  $  │", wall + rouletteCenter(label, 5) + wall, "╰─────╯"}
+				}
+				switch pocket {
+				case "SWORD":
+					art = []string{"/\\", "||", "--+--", label}
+					if unicode {
+						art = []string{"▲", "╘═╬═╛", "╩", label}
+					}
+				case "SHIELD":
+					art = []string{"/---\\", "| + |", "\\___/", label}
+					if unicode {
+						art = []string{"╭─────╮", "╰╮ ◇ ╭╯", " ╰───╯ ", label}
+					}
+				case "DOUBLE":
+					art = []string{"", "x 2", label, "RESPIN"}
+					if unicode {
+						art[1] = "× 2"
+					}
+				}
+			} else {
+				// Only the dollar symbols are drawn as banknotes; the logo and
+				// DOUBLE spaces show their name without the bill walls.
+				art = []string{".----.", wall + rouletteCenter(label, 4) + wall, "'----'"}
+				if unicode {
+					art = []string{"╭────╮", wall + rouletteCenter(label, 4) + wall, "╰────╯"}
+				}
+				switch pocket {
+				case "SWORD", "SHIELD", "DOUBLE":
+					art = []string{"", label, ""}
+				}
+			}
+			out.WriteString(bigSixInk(mode, pocket, rouletteCenter(art[row], width), result && i != center))
+			out.WriteString(borderInk(b.v))
+		}
+		out.WriteByte('\n')
+	}
+	out.WriteString(borderInk(bottom))
+	if result {
+		out.WriteString("\n" + strings.Repeat(" ", pointer-3) + bigSixInk(mode, s.Pockets[center], "WINNER", false))
+	}
+	return out.String()
+}