Fix Checkered and Ultima rules. Write Chess960 rules and complete others

[vchess.git] / public / javascripts / variants / Checkered.js

diff --git a/public/javascripts/variants/Checkered.js b/public/javascripts/variants/Checkered.js
index 019e1e2..814d91b 100644 (file)
--- a/public/javascripts/variants/Checkered.js
+++ b/public/javascripts/variants/Checkered.js
@@ -76,10 +76,15 @@ class CheckeredRules extends ChessRules
                        return standardMoves; //king has to be treated differently (for castles)
                let moves = [];
                standardMoves.forEach(m => {
-                       if (m.vanish[0].p == VariantRules.PAWN && Math.abs(m.end.x-m.start.x)==2
-                               && !this.pawnFlags[this.turn][m.start.y])
+                       if (m.vanish[0].p == VariantRules.PAWN)
                        {
-                               return; //skip forbidden 2-squares jumps
+                               if (Math.abs(m.end.x-m.start.x)==2 && !this.pawnFlags[this.turn][m.start.y])
+                                       return; //skip forbidden 2-squares jumps
+                               if (this.board[m.end.x][m.end.y] == VariantRules.EMPTY
+                                       && m.vanish.length==2 && this.getColor(m.start.x,m.start.y) == 'c')
+                               {
+                                       return; //checkered pawns cannot take en-passant
+                               }
                        }
                        if (m.vanish.length == 1)
                                moves.push(m); //no capture