static GenRandInitFen(randomness) {
if (randomness == 0)
// Deterministic:
- return "jsfqkbnr/pppppppp/8/8/8/8/PPPPPPPP/JSDQKBNR w 0 ahah - -";
+ return "jfsqkbnr/pppppppp/8/8/8/8/PPPPPPPP/JDSQKBNR w 0 ahah - -";
let pieces = { w: new Array(8), b: new Array(8) };
let flags = "";
if (c == 'b') {
// Check if white sentry is on the same color as ours.
// If yes: swap bishop and sentry positions.
- if ((pieces['w'].indexOf('s') - sentryPos) % 2 == 0)
+ // NOTE: test % 2 == 1 because there are 7 slashes.
+ if ((pieces['w'].indexOf('s') - sentryPos) % 2 == 1)
[bishopPos, sentryPos] = [sentryPos, bishopPos];
}
positions.splice(Math.max(randIndex, randIndex_tmp), 1);
positions.splice(randIndex, 1);
// Rook, jailer and king positions are now almost fixed,
- // only the ordering rook-> jailer or jailer->rook must be decided.
+ // only the ordering rook->jailer or jailer->rook must be decided.
let rookPos = positions[0];
let jailerPos = positions[2];
const kingPos = positions[1];
);
}
- // Adapted: castle with jailer possible
- getCastleMoves([x, y]) {
- const c = this.getColor(x, y);
- const firstRank = (c == "w" ? V.size.x - 1 : 0);
- if (x != firstRank || y != this.INIT_COL_KING[c])
- return [];
-
- const oppCol = V.GetOppCol(c);
- let moves = [];
- let i = 0;
- // King, then rook or jailer:
- const finalSquares = [
- [2, 3],
- [V.size.y - 2, V.size.y - 3]
- ];
- castlingCheck: for (
- let castleSide = 0;
- castleSide < 2;
- castleSide++
- ) {
- if (this.castleFlags[c][castleSide] >= 8) continue;
- // Rook (or jailer) and king are on initial position
- const finDist = finalSquares[castleSide][0] - y;
- let step = finDist / Math.max(1, Math.abs(finDist));
- i = y;
- do {
- if (
- this.isAttacked([x, i], oppCol) ||
- (this.board[x][i] != V.EMPTY &&
- (this.getColor(x, i) != c ||
- ![V.KING, V.ROOK, V.JAILER].includes(this.getPiece(x, i))))
- ) {
- continue castlingCheck;
- }
- i += step;
- } while (i != finalSquares[castleSide][0]);
- step = castleSide == 0 ? -1 : 1;
- const rookOrJailerPos = this.castleFlags[c][castleSide];
- for (i = y + step; i != rookOrJailerPos; i += step)
- if (this.board[x][i] != V.EMPTY) continue castlingCheck;
-
- // Nothing on final squares, except maybe king and castling rook or jailer?
- for (i = 0; i < 2; i++) {
- if (
- this.board[x][finalSquares[castleSide][i]] != V.EMPTY &&
- this.getPiece(x, finalSquares[castleSide][i]) != V.KING &&
- finalSquares[castleSide][i] != rookOrJailerPos
- ) {
- continue castlingCheck;
- }
- }
-
- // If this code is reached, castle is valid
- const castlingPiece = this.getPiece(firstRank, rookOrJailerPos);
- moves.push(
- new Move({
- appear: [
- new PiPo({ x: x, y: finalSquares[castleSide][0], p: V.KING, c: c }),
- new PiPo({ x: x, y: finalSquares[castleSide][1], p: castlingPiece, c: c })
- ],
- vanish: [
- new PiPo({ x: x, y: y, p: V.KING, c: c }),
- new PiPo({ x: x, y: rookOrJailerPos, p: castlingPiece, c: c })
- ],
- end:
- Math.abs(y - rookOrJailerPos) <= 2
- ? { x: x, y: rookOrJailerPos }
- : { x: x, y: y + 2 * (castleSide == 0 ? -1 : 1) }
- })
- );
- }
-
- return moves;
- }
-
atLeastOneMove() {
// If in second-half of a move, we already know that a move is possible
if (this.subTurn == 2) return true;
return this.filterValid(this.getPotentialMovesFrom(sentrySq));
}
- prePlay(move) {
- if (move.appear.length == 0 && move.vanish.length == 1)
- // The sentry is about to push a piece: subTurn goes from 1 to 2
- this.sentryPos = { x: move.end.x, y: move.end.y };
- if (this.subTurn == 2 && move.vanish[0].p != V.PAWN) {
- // A piece is pushed: forbid array of squares between start and end
- // of move, included (except if it's a pawn)
- let squares = [];
- if ([V.KNIGHT,V.KING].includes(move.vanish[0].p))
- // short-range pieces: just forbid initial square
- squares.push({ x: move.start.x, y: move.start.y });
- else {
- const deltaX = move.end.x - move.start.x;
- const deltaY = move.end.y - move.start.y;
- const step = [
- deltaX / Math.abs(deltaX) || 0,
- deltaY / Math.abs(deltaY) || 0
- ];
- for (
- let sq = {x: move.start.x, y: move.start.y};
- sq.x != move.end.x || sq.y != move.end.y;
- sq.x += step[0], sq.y += step[1]
- ) {
- squares.push({ x: sq.x, y: sq.y });
- }
- }
- // Add end square as well, to know if I was pushed (useful for lancers)
- squares.push({ x: move.end.x, y: move.end.y });
- this.sentryPush.push(squares);
- } else this.sentryPush.push(null);
- }
-
- play(move) {
-// if (!this.states) this.states = [];
-// const stateFen = this.getFen();
-// this.states.push(stateFen);
-
- this.prePlay(move);
- move.flags = JSON.stringify(this.aggregateFlags());
- this.epSquares.push(this.getEpSquare(move));
- V.PlayOnBoard(this.board, move);
- // Is it a sentry push? (useful for undo)
- move.sentryPush = (this.subTurn == 2);
- if (this.subTurn == 1) this.movesCount++;
- if (move.appear.length == 0 && move.vanish.length == 1) this.subTurn = 2;
- else {
- // Turn changes only if not a sentry "pre-push"
- this.turn = V.GetOppCol(this.turn);
- this.subTurn = 1;
- }
- this.postPlay(move);
- }
-
- postPlay(move) {
- if (move.vanish.length == 0 || this.subTurn == 2)
- // Special pass move of the king, or sentry pre-push: nothing to update
- return;
- const c = move.vanish[0].c;
- const piece = move.vanish[0].p;
- const firstRank = c == "w" ? V.size.x - 1 : 0;
-
- if (piece == V.KING) {
- this.kingPos[c][0] = move.appear[0].x;
- this.kingPos[c][1] = move.appear[0].y;
- this.castleFlags[c] = [V.size.y, V.size.y];
- return;
- }
- // Update castling flags if rooks are moved
- const oppCol = V.GetOppCol(c);
- const oppFirstRank = V.size.x - 1 - firstRank;
- if (
- move.start.x == firstRank && //our rook moves?
- this.castleFlags[c].includes(move.start.y)
- ) {
- const flagIdx = (move.start.y == this.castleFlags[c][0] ? 0 : 1);
- this.castleFlags[c][flagIdx] = V.size.y;
- } else if (
- move.end.x == oppFirstRank && //we took opponent rook?
- this.castleFlags[oppCol].includes(move.end.y)
- ) {
- const flagIdx = (move.end.y == this.castleFlags[oppCol][0] ? 0 : 1);
- this.castleFlags[oppCol][flagIdx] = V.size.y;
- }
- }
-
- undo(move) {
- this.epSquares.pop();
- this.disaggregateFlags(JSON.parse(move.flags));
- V.UndoOnBoard(this.board, move);
- // Decrement movesCount except if the move is a sentry push
- if (!move.sentryPush) this.movesCount--;
- if (this.subTurn == 2) this.subTurn = 1;
- else {
- this.turn = V.GetOppCol(this.turn);
- if (move.sentryPush) this.subTurn = 2;
- }
- this.postUndo(move);
-
-// const stateFen = this.getFen();
-// if (stateFen != this.states[this.states.length-1]) debugger;
-// this.states.pop();
- }
-
- postUndo(move) {
- super.postUndo(move);
- this.sentryPush.pop();
- }
-
isAttacked(sq, color) {
return (
super.isAttacked(sq, color) ||
this.isAttackedByLancer(sq, color) ||
this.isAttackedBySentry(sq, color)
+ // The jailer doesn't capture.
);
}
// Helper to check sentries attacks:
selfAttack([x1, y1], [x2, y2]) {
const color = this.getColor(x1, y1);
+ const oppCol = V.GetOppCol(color);
const sliderAttack = (allowedSteps, lancer) => {
const deltaX = x2 - x1,
absDeltaX = Math.abs(deltaX);
if (
// NOTE: no need to check OnBoard in this special case
(!lancer && this.board[sq[0]][sq[1]] != V.EMPTY) ||
- (!!lancer && this.getColor(sq[0], sq[1]) != color)
+ (!!lancer && this.getColor(sq[0], sq[1]) == oppCol)
) {
return false;
}
// Jailer doesn't capture or give check
+ prePlay(move) {
+ if (move.appear.length == 0 && move.vanish.length == 1)
+ // The sentry is about to push a piece: subTurn goes from 1 to 2
+ this.sentryPos = { x: move.end.x, y: move.end.y };
+ if (this.subTurn == 2 && move.vanish[0].p != V.PAWN) {
+ // A piece is pushed: forbid array of squares between start and end
+ // of move, included (except if it's a pawn)
+ let squares = [];
+ if ([V.KNIGHT,V.KING].includes(move.vanish[0].p))
+ // short-range pieces: just forbid initial square
+ squares.push({ x: move.start.x, y: move.start.y });
+ else {
+ const deltaX = move.end.x - move.start.x;
+ const deltaY = move.end.y - move.start.y;
+ const step = [
+ deltaX / Math.abs(deltaX) || 0,
+ deltaY / Math.abs(deltaY) || 0
+ ];
+ for (
+ let sq = {x: move.start.x, y: move.start.y};
+ sq.x != move.end.x || sq.y != move.end.y;
+ sq.x += step[0], sq.y += step[1]
+ ) {
+ squares.push({ x: sq.x, y: sq.y });
+ }
+ }
+ // Add end square as well, to know if I was pushed (useful for lancers)
+ squares.push({ x: move.end.x, y: move.end.y });
+ this.sentryPush.push(squares);
+ } else this.sentryPush.push(null);
+ }
+
+ play(move) {
+ this.prePlay(move);
+ move.flags = JSON.stringify(this.aggregateFlags());
+ this.epSquares.push(this.getEpSquare(move));
+ V.PlayOnBoard(this.board, move);
+ // Is it a sentry push? (useful for undo)
+ move.sentryPush = (this.subTurn == 2);
+ if (this.subTurn == 1) this.movesCount++;
+ if (move.appear.length == 0 && move.vanish.length == 1) this.subTurn = 2;
+ else {
+ // Turn changes only if not a sentry "pre-push"
+ this.turn = V.GetOppCol(this.turn);
+ this.subTurn = 1;
+ }
+ this.postPlay(move);
+ }
+
+ postPlay(move) {
+ if (move.vanish.length == 0 || this.subTurn == 2)
+ // Special pass move of the king, or sentry pre-push: nothing to update
+ return;
+ const c = move.vanish[0].c;
+ const piece = move.vanish[0].p;
+ const firstRank = c == "w" ? V.size.x - 1 : 0;
+
+ if (piece == V.KING) {
+ this.kingPos[c][0] = move.appear[0].x;
+ this.kingPos[c][1] = move.appear[0].y;
+ this.castleFlags[c] = [V.size.y, V.size.y];
+ return;
+ }
+ // Update castling flags if rooks are moved
+ const oppCol = V.GetOppCol(c);
+ const oppFirstRank = V.size.x - 1 - firstRank;
+ if (
+ move.start.x == firstRank && //our rook moves?
+ this.castleFlags[c].includes(move.start.y)
+ ) {
+ const flagIdx = (move.start.y == this.castleFlags[c][0] ? 0 : 1);
+ this.castleFlags[c][flagIdx] = V.size.y;
+ } else if (
+ move.end.x == oppFirstRank && //we took opponent rook?
+ this.castleFlags[oppCol].includes(move.end.y)
+ ) {
+ const flagIdx = (move.end.y == this.castleFlags[oppCol][0] ? 0 : 1);
+ this.castleFlags[oppCol][flagIdx] = V.size.y;
+ }
+ }
+
+ undo(move) {
+ this.epSquares.pop();
+ this.disaggregateFlags(JSON.parse(move.flags));
+ V.UndoOnBoard(this.board, move);
+ // Decrement movesCount except if the move is a sentry push
+ if (!move.sentryPush) this.movesCount--;
+ if (this.subTurn == 2) this.subTurn = 1;
+ else {
+ this.turn = V.GetOppCol(this.turn);
+ if (move.sentryPush) this.subTurn = 2;
+ }
+ this.postUndo(move);
+ }
+
+ postUndo(move) {
+ super.postUndo(move);
+ this.sentryPush.pop();
+ }
+
static get VALUES() {
return Object.assign(
{ l: 4.8, s: 2.8, j: 3.8 }, //Jeff K. estimations
if (Object.keys(V.LANCER_DIRNAMES).includes(move.vanish[0].p))
// Lancer: add direction info
notation += "=" + V.LANCER_DIRNAMES[move.appear[0].p];
+ else if (
+ move.vanish[0].p == V.PAWN &&
+ Object.keys(V.LANCER_DIRNAMES).includes(move.appear[0].p)
+ ) {
+ // Fix promotions in lancer:
+ notation = notation.slice(0, -1) + "L:" + V.LANCER_DIRNAMES[move.appear[0].p];
+ }
return notation;
}
};
projects / vchess.git / blobdiff