X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FCheckered.js;h=814d91b8ce10ee30e73c7cd7bd59173deb7db9ca;hb=2316f8b8248589effc756d5c09c73a1acb431574;hp=56fa15a382639c2b9361d390dc1aa99096b9a829;hpb=aea1443ebf56afb2c507c2830ac6b67b509778bc;p=vchess.git

diff --git a/public/javascripts/variants/Checkered.js b/public/javascripts/variants/Checkered.js
index 56fa15a3..814d91b8 100644
--- a/public/javascripts/variants/Checkered.js
+++ b/public/javascripts/variants/Checkered.js
@@ -1,6 +1,5 @@
 class CheckeredRules extends ChessRules
 {
-	// Path to pieces
 	static getPpath(b)
 	{
 		return b[0]=='c' ? "Checkered/"+b : b;
@@ -77,10 +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
@@ -89,7 +93,7 @@ class CheckeredRules extends ChessRules
 				// A capture occured (m.vanish.length == 2)
 				m.appear[0].c = "c";
 				moves.push(m);
-				if (m.appear[0].p != m.vanish[1].p //avoid promotions:
+				if (m.appear[0].p != m.vanish[1].p //avoid promotions (already treated):
 					&& (m.vanish[0].p != VariantRules.PAWN || m.end.x != lastRank))
 				{
 					// Add transformation into captured piece
@@ -104,7 +108,8 @@ class CheckeredRules extends ChessRules
 
 	canIplay(side, [x,y])
 	{
-		return ((side=='w' && this.moves.length%2==0) || (side=='b' && this.moves.length%2==1))
+		return ((side=='w' && this.moves.length%2==0)
+				|| (side=='b' && this.moves.length%2==1))
 			&& [side,'c'].includes(this.getColor(x,y));
 	}
 
@@ -167,7 +172,8 @@ class CheckeredRules extends ChessRules
 		this.play(move);
 		const color = this.turn;
 		this.moves.push(move); //artifically change turn, for checkered pawns (TODO)
-		const kingAttacked = this.isAttacked(this.kingPos[color], [this.getOppCol(color),'c']);
+		const kingAttacked = this.isAttacked(
+			this.kingPos[color], [this.getOppCol(color),'c']);
 		let res = kingAttacked
 			? [ JSON.parse(JSON.stringify(this.kingPos[color])) ] //need to duplicate!
 			: [ ];
@@ -191,13 +197,12 @@ class CheckeredRules extends ChessRules
 	checkGameEnd()
 	{
 		const color = this.turn;
-		if (!this.isAttacked(this.kingPos[color], this.getOppCol(color))
-			&& !this.isAttacked(this.kingPos[color], 'c'))
-		{
-			return "1/2";
-		}
-		// OK, checkmate
-		return color == "w" ? "0-1" : "1-0";
+		this.moves.length++; //artifically change turn, for checkered pawns (TODO)
+		const res = this.isAttacked(this.kingPos[color], [this.getOppCol(color),'c'])
+			? (color == "w" ? "0-1" : "1-0")
+			: "1/2";
+		this.moves.length--;
+		return res;
 	}
 
 	evalPosition()
@@ -261,12 +266,15 @@ class CheckeredRules extends ChessRules
 			{
 				// Capture
 				let startColumn = String.fromCharCode(97 + move.start.y);
-				notation = startColumn + "x" + finalSquare + "=" + move.appear[0].p.toUpperCase();
+				notation = startColumn + "x" + finalSquare +
+					"=" + move.appear[0].p.toUpperCase();
 			}
 			else //no capture
+			{
 				notation = finalSquare;
-			if (move.appear.length > 0 && piece != move.appear[0].p) //promotion
-				notation += "=" + move.appear[0].p.toUpperCase();
+				if (move.appear.length > 0 && piece != move.appear[0].p) //promotion
+					notation += "=" + move.appear[0].p.toUpperCase();
+			}
 			return notation;
 		}