feat: better roulette racetrack graphics and payout table

1 files changed, 18 insertions, 4 deletions

diff --git a/data/help/roulette.yaml b/data/help/roulette.yaml
index 5982fb3..790313f 100644
--- a/data/help/roulette.yaml
+++ b/data/help/roulette.yaml
@@ -1,5 +1,6 @@
 name: roulette
 category: Interaction
+related: [racetrack, casino, blackjack, baccarat, slots]
 description: |
   Play roulette in the Domita Fortuna casino.
   From the vestibule: north, up, north reaches single zero;
@@ -31,22 +32,35 @@ description: |
   bet 10 on street 1 2 3      A three-number column (11:1)
   bet 10 on corner 1 2 4 5    A 2x2 square (8:1)
   bet 10 on line 1 2 3 4 5 6  Two adjacent streets (5:1)
-  bet 10 on trio 0 1 2        A zero plus the first street (11:1)
+  bet 10 on trio 0 1 2        Three touching zero-edge pockets (11:1)
   bet 10 on basket            0,00,1,2,3 on double zero (6:1);
                              0,1,2,3 on single zero (8:1)
 
-  On single-zero tables with the racetrack option, the numbers below are
-  shown in wheel order for reference; the named bets are the wagers and
+  On single-zero tables with the racetrack option, the oval board shows
+  every pocket in physical wheel order; the named bets are the wagers and
   their chips are placed for you. The amount is the total stake, split
   evenly across the bet's chips.
 
   bet 10 on voisins       Voisins du Zero: 17 numbers around 0 (9 chips)
   bet 10 on tiers         Tiers du Cylindre: the far third (6 chips)
   bet 10 on orphelins     Orphelins: the two orphan arcs (5 chips)
-  bet 10 on zero spiel    Zero Spiel: the numbers nearest 0 (4 chips)
+  bet 10 on zero          Jeu Zero: the numbers nearest 0 (4 chips)
+                          'jeu zero' or 'jeuzero' also works; '0' bets pocket 0 only.
   bet 10 on neighbors 17  Number 17 plus four numbers each side of it
                           on the wheel (9 chips)
 
+  Use help racetrack for the chip placements and each call bet's payouts.
+  Use table for a formatted payout reference for your current wheel.
+
+  Call-bet returns depend on which chip placements win; overlapping
+  wins are added together. Fractional credit returns are rounded down.
+  Use a multiple of the chip count to avoid rounding. Neighbors pays 3:1
+  on the total stake (9 of the 37 pockets win).
+
+  Every pocket is equally likely: 1/37 on single zero, 1/38 on double
+  zero. The house edge is 2.70% or 5.26%, except the American basket
+  (7.89%). Call-bet rounding can increase the edge for other stake sizes.
+
   One wager per player per spin; a combination or call bet is still one
   wager.
   Zero and double zero lose all outside bets. Chips are spent first;