1 files changed, 32 insertions, 11 deletions

diff --git a/docs/GAMES.md b/docs/GAMES.md
index 2b8adf5..364cfef 100644
--- a/docs/GAMES.md
+++ b/docs/GAMES.md
@@ -79,19 +79,32 @@ Q       forfeit an active hand (bet is lost), or leave when no hand is active
 ## Roulette
 
 - European wheel: 0-36, one green zero.
-- Bets: red, black, even, odd, and straight numbers.
-- Bets can be split across all of those; every winning bet is added together.
-- Straight pays 35:1 (36x returned), outside bets pay 1:1 (2x returned).
-- 0 loses all outside bets. RTP is 36/37 = 97.30%.
-- Numbers are color-coded in the TUI: red numbers are red, 0 is green, and
-  black numbers stay at the default terminal color. Bet amounts and balances
-  are not colored.
+- The felt is drawn in full and bet with a cursor. Over the numbers the cursor
+  sits on a *lattice point*, the way a chip sits between numbers on a real
+  felt: an inner point covers four numbers (corner), an edge point covers two
+  (split), and an outer corner is a straight.
+- Bet types and returns (per unit staked, stake included):
+
+  | Bet | Covers | Return |
+  | --- | --- | --- |
+  | Straight | one number | 36x |
+  | Split | two adjacent numbers | 18x |
+  | Corner | four numbers | 9x |
+  | Dozen | 1-12, 13-24, 25-36 | 3x |
+  | Column | 1,4,...,34 / 2,5,...,35 / 3,6,...,36 | 3x |
+  | Outside | 1-18, 19-36, EVEN, ODD, RED, BLACK | 2x |
+
+- 0 loses every outside bet, both dozens and every column. It pays a straight,
+  and split/corner bets containing 0 are not offered.
+- Every chip is settled independently and added together. RTP is 36/37 =
+  97.30% because every bet uses the same European odds.
+- Bet amounts and balances are not colored in the TUI.
 
 Client controls inside roulette:
 
 ```
-R / B / E / O   add the current chip to red/black/even/odd
-digits + Enter  add the current chip to that number
+arrows          move the cursor over the felt, including between numbers
+ENTER           place the current chip on the cursor
 C               clear all bets
 + or = / -      change the chip size
 SPACE           spin
@@ -125,7 +138,7 @@ plays (
 {"reels":"CCCCLLCLODGSDGS","win_type":"win","win_lines":"1","win_cells":"0,3,6"}
 
 // roulette
-{"number":"17","color":"black","bets":"{\"red\":10,\"black\":10,\"even\":10,\"odd\":10,\"numbers\":[{\"number\":17,\"amount\":5}]}"}
+{"number":"17","color":"black","bets":"{\"chips\":[{\"target\":{\"bet\":\"outside\",\"kind\":\"red\"},\"amount\":10}]}"}
 
 // blackjack
 {"player":["10S","6H","5D"],"dealer":["9D","8C"],"player_total":21,"dealer_total":17,"bet":10,"result":"win","winnings":20}
@@ -174,13 +187,21 @@ PLAY_START slots <bet>
 GAME_RESULT <session> <winnings> <bet> <balance> <reels> <win_type> <win_lines> <win_cells>
 ```
 
-Roulette adds a compact bets payload and a roulette-specific result:
+Roulette sends the chips and gets a roulette-specific result:
 
 ```
 PLAY_START roulette <total> <bets-json>
 ROULETTE_RESULT <session> <winnings> <bet> <balance> <number> <color> <bets-json>
 ```
 
+`bets-json` is `{"chips":[{"target":{...},"amount":N}]}`. A target is one of
+`{"bet":"straight","number":17}`, `{"bet":"split","a":1,"b":2}`,
+`{"bet":"corner","numbers":[1,2,4,5]}`, `{"bet":"dozen","index":1}`,
+`{"bet":"column","index":0}` or
+`{"bet":"outside","kind":"red"}` (`low`, `high`, `even`, `odd`, `red`,
+`black`). The server rejects unknown, out-of-range or duplicate-number
+targets, and requires the total to equal the sum of the chips.
+
 Blackjack is a multi-step session:
 
 ```