const firstRank = (color == 'w' ? sizeX-1 : 0);
const startRank = (color == "w" ? sizeX-2 : 1);
const lastRank = (color == "w" ? 0 : sizeX-1);
+ const finalPieces = x + shiftX == lastRank
+ ? [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]
+ : [V.PAWN];
- if (x+shiftX >= 0 && x+shiftX < sizeX) //TODO: always true
+ // One square diagonally
+ for (let shiftY of [-1,1])
{
- const finalPieces = x + shiftX == lastRank
- ? [V.ROOK,V.KNIGHT,V.BISHOP,V.QUEEN]
- : [V.PAWN]
- // One square diagonally
- for (let shiftY of [-1,1])
+ if (this.board[x+shiftX][y+shiftY] == V.EMPTY)
{
- if (this.board[x+shiftX][y+shiftY] == V.EMPTY)
+ for (let piece of finalPieces)
{
- for (let piece of finalPieces)
- {
- moves.push(this.getBasicMove([x,y], [x+shiftX,y+shiftY],
- {c:color,p:piece}));
- }
- if (x == startRank && y+2*shiftY>=0 && y+2*shiftY<sizeY
- && this.board[x+2*shiftX][y+2*shiftY] == V.EMPTY)
- {
- // Two squares jump
- moves.push(this.getBasicMove([x,y], [x+2*shiftX,y+2*shiftY]));
- }
+ moves.push(this.getBasicMove([x,y], [x+shiftX,y+shiftY],
+ {c:color,p:piece}));
+ }
+ if (x == startRank && y+2*shiftY>=0 && y+2*shiftY<sizeY
+ && this.board[x+2*shiftX][y+2*shiftY] == V.EMPTY)
+ {
+ // Two squares jump
+ moves.push(this.getBasicMove([x,y], [x+2*shiftX,y+2*shiftY]));
}
}
- // Capture
- if (this.board[x+shiftX][y] != V.EMPTY
- && this.canTake([x,y], [x+shiftX,y]))
- {
- for (let piece of finalPieces)
- moves.push(this.getBasicMove([x,y], [x+shiftX,y], {c:color,p:piece}));
- }
+ }
+ // Capture
+ if (this.board[x+shiftX][y] != V.EMPTY
+ && this.canTake([x,y], [x+shiftX,y]))
+ {
+ for (let piece of finalPieces)
+ moves.push(this.getBasicMove([x,y], [x+shiftX,y], {c:color,p:piece}));
}
// En passant
if (piece == V.PAWN)
{
// Pawn move
+ const finalSquare = V.CoordsToSquare(move.end);
let notation = "";
if (move.vanish.length == 2) //capture
- notation = finalSquare;
+ notation = "Px" + finalSquare;
else
{
- // No capture
- const startColumn = V.CoordToColumn(move.start.y);
- notation = startColumn + "x" + finalSquare;
+ // No capture: indicate the initial square for potential ambiguity
+ const startSquare = V.CoordsToSquare(move.start);
+ notation = startSquare + finalSquare;
}
if (move.appear[0].p != V.PAWN) //promotion
notation += "=" + move.appear[0].p.toUpperCase();