X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FCheckered.js;h=2d62d4b8af2bdaf53f64aa6414ea390a42fa3fe1;hb=0b7d99ecbb5dedc02cd96c457b5fc2962db9b297;hp=f1cf771f948e585ce9a4ce7342058c154b7d69e0;hpb=5bfb09560aa346d132e829a7c63558407bcc8091;p=vchess.git

diff --git a/public/javascripts/variants/Checkered.js b/public/javascripts/variants/Checkered.js
index f1cf771f..2d62d4b8 100644
--- a/public/javascripts/variants/Checkered.js
+++ b/public/javascripts/variants/Checkered.js
@@ -72,14 +72,19 @@ class CheckeredRules extends ChessRules
 	{
 		let standardMoves = super.getPotentialMovesFrom([x,y]);
 		const lastRank = this.turn == "w" ? 0 : 7;
-		if (this.getPiece(x,y) == VariantRules.KING)
+		if (this.getPiece(x,y) == V.KING)
 			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 == V.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] == V.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
@@ -88,8 +93,8 @@ 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:
-					&& (m.vanish[0].p != VariantRules.PAWN || m.end.x != lastRank))
+				if (m.appear[0].p != m.vanish[1].p //avoid promotions (already treated):
+					&& (m.vanish[0].p != V.PAWN || m.end.x != lastRank))
 				{
 					// Add transformation into captured piece
 					let m2 = JSON.parse(JSON.stringify(m));
@@ -103,7 +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));
 	}
 
@@ -141,7 +147,7 @@ class CheckeredRules extends ChessRules
 			{
 				for (let i of [-1,1])
 				{
-					if (y+i>=0 && y+i<8 && this.getPiece(x+pawnShift,y+i)==VariantRules.PAWN
+					if (y+i>=0 && y+i<8 && this.getPiece(x+pawnShift,y+i)==V.PAWN
 						&& this.getColor(x+pawnShift,y+i)==c)
 					{
 						return true;
@@ -166,7 +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!
 			: [ ];
@@ -177,42 +184,37 @@ class CheckeredRules extends ChessRules
 
 	updateVariables(move)
 	{
-		const c = this.getColor(move.start.x,move.start.y);
-		if (c != 'c') //checkered not concerned by castle flags
-			super.updateVariables(move);
-
-		// Does it turn off a 2-squares pawn flag?
+		super.updateVariables(move);
+		// Does this move turn off a 2-squares pawn flag?
 		const secondRank = [1,6];
-		if (secondRank.includes(move.start.x) && move.vanish[0].p == VariantRules.PAWN)
+		if (secondRank.includes(move.start.x) && move.vanish[0].p == V.PAWN)
 			this.pawnFlags[move.start.x==6 ? "w" : "b"][move.start.y] = false;
 	}
 
 	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()
 	{
-		const [sizeX,sizeY] = VariantRules.size;
 		let evaluation = 0;
 		//Just count material for now, considering checkered neutral (...)
-		for (let i=0; i<sizeX; i++)
+		for (let i=0; i<V.size.x; i++)
 		{
-			for (let j=0; j<sizeY; j++)
+			for (let j=0; j<V.size.y; j++)
 			{
-				if (this.board[i][j] != VariantRules.EMPTY)
+				if (this.board[i][j] != V.EMPTY)
 				{
 					const sqColor = this.getColor(i,j);
 					const sign = sqColor == "w" ? 1 : (sqColor=="b" ? -1 : 0);
-					evaluation += sign * VariantRules.VALUES[this.getPiece(i,j)];
+					evaluation += sign * V.VALUES[this.getPiece(i,j)];
 				}
 			}
 		}
@@ -249,10 +251,10 @@ class CheckeredRules extends ChessRules
 
 		// Translate final square
 		let finalSquare =
-			String.fromCharCode(97 + move.end.y) + (VariantRules.size[0]-move.end.x);
+			String.fromCharCode(97 + move.end.y) + (V.size.x-move.end.x);
 
 		let piece = this.getPiece(move.start.x, move.start.y);
-		if (piece == VariantRules.PAWN)
+		if (piece == V.PAWN)
 		{
 			// Pawn move
 			let notation = "";
@@ -260,12 +262,15 @@ 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;
 		}