1 files changed, 28 insertions, 6 deletions
diff --git a/data/help/combat.yaml b/data/help/combat.yaml
index f588d81..7a190f7 100644
--- a/data/help/combat.yaml
+++ b/data/help/combat.yaml
@@ -3,18 +3,40 @@ category: "General"
 description: |
   Attack a mob with: attack <mob>
 
-  Your accuracy depends on your attack type (stab, slash, crush, ranged,
-  or science) and your total equipment bonus for that type. Your weapon
-  determines the attack type.
+  Combat follows standard OSRS formulas for accuracy, hit chance,
+  maximum hit, and damage output. The three attack styles (melee,
+  ranged, and science) each use the same core formula structure.
 
-  Mobs have per-type defense bonuses. A skeleton with high slash defense
-  but weak crush defense takes more hits from a mace than a sword.
+  Attack roll:  EffectiveAttack * (EquipmentBonus + 64)
+  Max hit:      (EffectiveStrength * (EquipmentStrength + 64) + 320) / 640
+  Hit chance:   If AttackRoll > DefenseRoll:
+                  1 - (DefRoll + 2) / (2 * (AtkRoll + 1))
+                Else:
+                  AtkRoll / (2 * (DefRoll + 1))
+  Damage:       Roll [0, MaxHit], 0 becomes 1
+
+  Effective Levels:
+    Player:      level + style_bonus + tech_boosts + 8
+    NPC:         level + 9
+    Science:     level + 9 (no style bonus)
+
+  Your accuracy depends on your weapon's attack type (stab, slash,
+  crush, ranged, or science) and your total equipment bonus for
+  that type.
+
+  Mobs have per-type defense bonuses. A skeleton with high slash
+  defense but weak crush defense takes more hits from a mace than
+  a sword. Mobs also have a weakness element — matching it with
+  a science module's element boosts both accuracy and damage.
 
   Use the 'style' command to change your combat style:
-    accurate    - +3 accuracy level, XP to accuracy
+    accurate    - +3 accuracy/ranged level, XP to accuracy/ranged
     aggressive  - +3 strength level, XP to strength
     defensive   - +3 defense level, XP to defense
     balanced    - +1 to all, XP split evenly
 
+  For melee weapons the style affects attack/strength/defense.
+  For ranged weapons accurate and aggressive both give +3 ranged.
+
   Use 'stats' to see your total equipment bonuses and current attack roll.
   Use 'look <item>' to see an item's combat stats.