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QuickChess
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Added en passant. Moves now objects, not arrays

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Sage Vaillancourt 2020-12-30 09:49:29 -05:00
parent 0c2d99e762
commit e121755d29
2 changed files with 31 additions and 21 deletions
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2
README.md
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@ -1,7 +1,7 @@
# QuickChess # QuickChess
This is a simple implementation of Chess in React. It supports nearly all moves, This is a simple implementation of Chess in React. It supports nearly all moves,
with en passant and castling still to be added. A live build can be seen here: with castling still to be added. A live build can be seen here:
[https://sagev.space/quickchess/](https://sagev.space/quickchess/). Assets [https://sagev.space/quickchess/](https://sagev.space/quickchess/). Assets
borrowed from Wikipedia. borrowed from Wikipedia.

44
src/index.js
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@ -87,6 +87,7 @@ class Piece {
constructor(color, type) { constructor(color, type) {
this.color = color; this.color = color;
this.type = type; this.type = type;
this.passantable = false;
} }
setType(type) { setType(type) {
this.type = type; this.type = type;
@ -103,7 +104,6 @@ class Board extends React.Component {
heldPiece: null, heldPiece: null,
}, },
}; };
this.passantable = false;
} }
setHand(hand) { setHand(hand) {
@ -189,11 +189,11 @@ class Board extends React.Component {
var moves = []; var moves = [];
let tryAddMove = (x, y) => { let tryAddMove = (x, y) => {
if (x >= 0 && x < 8 && y >= 0 && y < 8 && this.pieceAt(x, y) == null) { if (x >= 0 && x < 8 && y >= 0 && y < 8 && this.pieceAt(x, y) == null) {
moves.push([x, y]); moves.push({x: x, y: y});
// Keep searching // Keep searching
return 0; return 0;
} else if (this.isEnemyOf(piece, x, y)) { } else if (this.isEnemyOf(piece, x, y)) {
moves.push([x, y]); moves.push({x: x, y: y});
} }
// Stop searching // Stop searching
return 1; return 1;
@ -204,26 +204,26 @@ class Board extends React.Component {
let shift = pieceIsBlack ? -1 : 1; let shift = pieceIsBlack ? -1 : 1;
let startLine = pieceIsBlack ? 6 : 1; let startLine = pieceIsBlack ? 6 : 1;
if (this.passantable) { // Check for en passant
let left = this.pieceAt(x - 1, y); let left = this.pieceAt(x - 1, y);
let right = this.pieceAt(x + 1, y); let right = this.pieceAt(x + 1, y);
if(left != null && left.color !== piece.color) { if (left != null && left.passantable && left.color !== piece.color) {
moves.push([x - 1, y + shift]/*.passant=[x - 1, y]*/) moves.push({x:x - 1, y:y + shift, passant: {x: x - 1, y: y}})
}
if(right != null && right.color !== piece.color) {
moves.push([x + 1, y + shift]/*.passant=[x + 1, y]*/)
} }
if (right != null && right.passantable && right.color !== piece.color) {
moves.push({x: x + 1, y: y + shift, passant: {x: x + 1, y: y}})
} }
// Pawn moving two spaces becomes en-passantable
if (this.pieceAt(x, y + shift) == null) { if (this.pieceAt(x, y + shift) == null) {
moves.push([x, y + shift]); moves.push({x: x, y: y + shift});
if (y === startLine && this.pieceAt(x, y + (shift * 2)) == null) { if (y === startLine && this.pieceAt(x, y + (shift * 2)) == null) {
moves.push([x, y + (shift * 2)]/*.passantable=true*/); moves.push({x: x, y: y + (shift * 2), passantable: true});
} }
} }
[x + 1, x - 1].forEach(x => { [x + 1, x - 1].forEach(x => {
if (x >= 0 && x < 8 && this.isEnemyOf(piece, x, y + shift)) { if (x >= 0 && x < 8 && this.isEnemyOf(piece, x, y + shift)) {
moves.push([x, y + shift]); moves.push({x: x, y: y + shift});
} }
}); });
} else if (isRook(piece)) { } else if (isRook(piece)) {
@ -329,7 +329,7 @@ class Board extends React.Component {
if(this.isEnemyOf(piece, x, y)) { if(this.isEnemyOf(piece, x, y)) {
let moves = this.getValidMoves(i); let moves = this.getValidMoves(i);
for(var j = 0; j < moves.length; j++) { for(var j = 0; j < moves.length; j++) {
if(moves[j][0] === kingPos[0] && moves[j][1] === kingPos[1]) { if(moves[j].x === kingPos[0] && moves[j].y === kingPos[1]) {
return piece; return piece;
} }
} }
@ -366,7 +366,7 @@ class Board extends React.Component {
// For each move of the above piece // For each move of the above piece
let moves = board.getValidMoves(i) let moves = board.getValidMoves(i)
for(var j = 0; j < moves.length; j++) { for(var j = 0; j < moves.length; j++) {
let [x, y] = moves[j]; let [x, y] = [moves[j].x, moves[j].y];
board.state.squares[x + (y * 8)] = board.state.squares[i]; board.state.squares[x + (y * 8)] = board.state.squares[i];
board.state.squares[i] = null; board.state.squares[i] = null;
let check = board.inCheck(checkedKing); let check = board.inCheck(checkedKing);
@ -393,7 +393,8 @@ class Board extends React.Component {
let [destX, destY] = this.getXandY(dest); let [destX, destY] = this.getXandY(dest);
for (var move of this.getValidMoves(source)) { for (var move of this.getValidMoves(source)) {
let [x, y] = move; let x = move.x;
let y = move.y;
if (destX === x && destY === y) { if (destX === x && destY === y) {
return move; return move;
} }
@ -414,8 +415,17 @@ class Board extends React.Component {
const squares = this.state.squares.slice(); const squares = this.state.squares.slice();
let move = this.isValidMove(from, to) let move = this.isValidMove(from, to)
if (move) { if (move) {
if (move.passant != null) { if (move.passant) {
squares[move.passant[0] + (move.passant[1] * 8)] = null; squares[move.passant.x + (move.passant.y * 8)] = null;
}
// Remove existing passantable states
for(var square of squares) {
if (square) {
square.passantable = false;
}
}
if (move.passantable) {
squares[from].passantable = true;
} }
let y = this.getXandY(to)[1]; let y = this.getXandY(to)[1];
squares[to] = squares[from]; squares[to] = squares[from];