this.moves = moves;
// Use fen string to initialize variables, flags and board
this.board = VariantRules.GetBoard(fen);
- this.flags = VariantRules.GetFlags(fen);
+ this.setFlags(fen);
this.initVariables(fen);
}
const position = fenParts[0].split("/");
for (let i=0; i<position.length; i++)
{
- let j = 0;
- while (j < position[i].length)
+ let k = 0; //column index on board
+ for (let j=0; j<position[i].length; j++)
{
switch (position[i].charAt(j))
{
case 'k':
- this.kingPos['b'] = [i,j];
- this.INIT_COL_KING['b'] = j;
+ this.kingPos['b'] = [i,k];
+ this.INIT_COL_KING['b'] = k;
break;
case 'K':
- this.kingPos['w'] = [i,j];
- this.INIT_COL_KING['w'] = j;
+ this.kingPos['w'] = [i,k];
+ this.INIT_COL_KING['w'] = k;
break;
case 'r':
if (this.INIT_COL_ROOK['b'][0] < 0)
- this.INIT_COL_ROOK['b'][0] = j;
+ this.INIT_COL_ROOK['b'][0] = k;
else
- this.INIT_COL_ROOK['b'][1] = j;
+ this.INIT_COL_ROOK['b'][1] = k;
break;
case 'R':
if (this.INIT_COL_ROOK['w'][0] < 0)
- this.INIT_COL_ROOK['w'][0] = j;
+ this.INIT_COL_ROOK['w'][0] = k;
else
- this.INIT_COL_ROOK['w'][1] = j;
+ this.INIT_COL_ROOK['w'][1] = k;
break;
default:
let num = parseInt(position[i].charAt(j));
if (!isNaN(num))
- j += (num-1);
+ k += (num-1);
}
- j++;
+ k++;
}
}
const epSq = this.moves.length > 0 ? this.getEpSquare(this.lastMove) : undefined;
}
// Overridable: flags can change a lot
- static GetFlags(fen)
+ setFlags(fen)
{
// white a-castle, h-castle, black a-castle, h-castle
- let flags = {'w': new Array(2), 'b': new Array(2)};
- let fenFlags = fen.split(" ")[1]; //flags right after position
+ this.castleFlags = {'w': new Array(2), 'b': new Array(2)};
+ let flags = fen.split(" ")[1]; //flags right after position
for (let i=0; i<4; i++)
- flags[i < 2 ? 'w' : 'b'][i%2] = (fenFlags.charAt(i) == '1');
- return flags;
+ this.castleFlags[i < 2 ? 'w' : 'b'][i%2] = (flags.charAt(i) == '1');
}
///////////////////
};
}
+ // Aggregates flags into one object
+ get flags() {
+ return this.castleFlags;
+ }
+
+ // Reverse operation
+ parseFlags(flags)
+ {
+ this.castleFlags = flags;
+ }
+
// En-passant square, if any
getEpSquare(move)
{
// Build a regular move from its initial and destination squares; tr: transformation
getBasicMove([sx,sy], [ex,ey], tr)
{
- var mv = new Move({
+ let mv = new Move({
appear: [
new PiPo({
x: ex,
getSlideNJumpMoves([x,y], steps, oneStep)
{
const color = this.getColor(x,y);
- var moves = [];
+ let moves = [];
const [sizeX,sizeY] = VariantRules.size;
outerLoop:
for (let step of steps)
// What are the pawn moves from square x,y considering color "color" ?
getPotentialPawnMoves([x,y])
{
- const color = this.getColor(x,y);
- var moves = [];
- var V = VariantRules;
+ const color = this.turn;
+ let moves = [];
+ const V = VariantRules;
const [sizeX,sizeY] = VariantRules.size;
- let shift = (color == "w" ? -1 : 1);
- let startRank = (color == "w" ? sizeY-2 : 1);
- let lastRank = (color == "w" ? 0 : sizeY-1);
+ const shift = (color == "w" ? -1 : 1);
+ const firstRank = (color == 'w' ? sizeY-1 : 0);
+ const startRank = (color == "w" ? sizeY-2 : 1);
+ const lastRank = (color == "w" ? 0 : sizeY-1);
if (x+shift >= 0 && x+shift < sizeX && x+shift != lastRank)
{
if (this.board[x+shift][y] == V.EMPTY)
{
moves.push(this.getBasicMove([x,y], [x+shift,y]));
- if (x==startRank && this.board[x+2*shift][y] == V.EMPTY)
+ // Next condition because variants with pawns on 1st rank generally allow them to jump
+ if ([startRank,firstRank].includes(x) && this.board[x+2*shift][y] == V.EMPTY)
{
// Two squares jump
moves.push(this.getBasicMove([x,y], [x+2*shift,y]));
castlingCheck:
for (let castleSide=0; castleSide < 2; castleSide++) //large, then small
{
- if (!this.flags[c][castleSide])
+ if (!this.castleFlags[c][castleSide])
continue;
// If this code is reached, rooks and king are on initial position
getCheckSquares(move)
{
this.play(move);
- const color = this.turn;
+ const color = this.turn; //opponent
let res = this.isAttacked(this.kingPos[color], this.getOppCol(color))
? [ JSON.parse(JSON.stringify(this.kingPos[color])) ] //need to duplicate!
: [ ];
{
this.kingPos[c][0] = move.appear[0].x;
this.kingPos[c][1] = move.appear[0].y;
- this.flags[c] = [false,false];
+ this.castleFlags[c] = [false,false];
return;
}
const oppCol = this.getOppCol(c);
if (move.start.x == firstRank //our rook moves?
&& this.INIT_COL_ROOK[c].includes(move.start.y))
{
- const flagIdx = move.start.y == this.INIT_COL_ROOK[c][0] ? 0 : 1;
- this.flags[c][flagIdx] = false;
+ const flagIdx = (move.start.y == this.INIT_COL_ROOK[c][0] ? 0 : 1);
+ this.castleFlags[c][flagIdx] = false;
}
else if (move.end.x == oppFirstRank //we took opponent rook?
&& this.INIT_COL_ROOK[c].includes(move.end.y))
{
- const flagIdx = move.end.y == this.INIT_COL_ROOK[oppCol][0] ? 0 : 1;
- this.flags[oppCol][flagIdx] = false;
+ const flagIdx = (move.end.y == this.INIT_COL_ROOK[oppCol][0] ? 0 : 1);
+ this.castleFlags[oppCol][flagIdx] = false;
}
}
play(move, ingame)
{
+ console.log("AVANT " + this.getNotation(move) + " " + this.board[1][5]);
if (!!ingame)
move.notation = this.getNotation(move);
- // Save flags (for undo)
- move.flags = JSON.stringify(this.flags); //TODO: less costly?
+ move.flags = JSON.stringify(this.flags); //save flags (for undo)
this.updateVariables(move);
this.moves.push(move);
this.epSquares.push( this.getEpSquare(move) );
this.epSquares.pop();
this.moves.pop();
this.unupdateVariables(move);
- this.flags = JSON.parse(move.flags);
+ this.parseFlags(JSON.parse(move.flags));
+ console.log("APRES " + this.getNotation(move) + " " + this.board[1][5]);
}
//////////////
// END OF GAME
- checkGameOver()
+ checkRepetition()
{
// Check for 3 repetitions
if (this.moves.length >= 8)
_.isEqual(this.moves[L-3], this.moves[L-7]) &&
_.isEqual(this.moves[L-4], this.moves[L-8]))
{
- return "1/2 (repetition)";
+ return true;
}
}
+ return false;
+ }
- if (this.atLeastOneMove())
- {
- // game not over
+ checkGameOver()
+ {
+ if (this.checkRepetition())
+ return "1/2";
+
+ if (this.atLeastOneMove()) // game not over
return "*";
- }
// Game over
return this.checkGameEnd();
for (let i of ['w','b'])
{
for (let j=0; j<2; j++)
- fen += this.flags[i][j] ? '1' : '0';
+ fen += this.castleFlags[i][j] ? '1' : '0';
}
return fen;
}
projects / vchess.git / blobdiff