X-Git-Url: https://git.auder.net/?p=vchess.git;a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FEightpieces.js;h=fa80824bef1fddef326a51e7e15017531c944b2a;hp=465fbea924dc55d76c59c32e02b77fc1b83f3a1e;hb=d54f6261c9e30f4eabb402ad301dd5c5e40fb656;hpb=b0a0468aa6f436f2ad4962492561ef430a3bc15c diff --git a/client/src/variants/Eightpieces.js b/client/src/variants/Eightpieces.js index 465fbea9..fa80824b 100644 --- a/client/src/variants/Eightpieces.js +++ b/client/src/variants/Eightpieces.js @@ -2,7 +2,7 @@ import { ArrayFun } from "@/utils/array"; import { randInt } from "@/utils/alea"; import { ChessRules, PiPo, Move } from "@/base_rules"; -export const VariantRules = class EightpiecesRules extends ChessRules { +export class EightpiecesRules extends ChessRules { static get JAILER() { return "j"; } @@ -13,6 +13,11 @@ export const VariantRules = class EightpiecesRules extends ChessRules { return "l"; } + static get IMAGE_EXTENSION() { + // Temporarily, for the time SVG pieces are being designed: + return ".png"; + } + // Lancer directions *from white perspective* static get LANCER_DIRS() { return { @@ -41,9 +46,9 @@ export const VariantRules = class EightpiecesRules extends ChessRules { } getPpath(b, color, score, orientation) { - if ([V.JAILER, V.SENTRY].includes(b[1])) return "Eightpieces/" + b; + if ([V.JAILER, V.SENTRY].includes(b[1])) return "Eightpieces/tmp_png/" + b; if (Object.keys(V.LANCER_DIRS).includes(b[1])) { - if (orientation == 'w') return "Eightpieces/" + b; + if (orientation == 'w') return "Eightpieces/tmp_png/" + b; // Find opposite direction for adequate display: let oppDir = ''; switch (b[1]) { @@ -72,9 +77,10 @@ export const VariantRules = class EightpiecesRules extends ChessRules { oppDir = 'f'; break; } - return "Eightpieces/" + b[0] + oppDir; + return "Eightpieces/tmp_png/" + b[0] + oppDir; } - return b; + // TODO: after we have SVG pieces, remove the folder and next prefix: + return "Eightpieces/tmp_png/" + b; } getPPpath(b, orientation) { @@ -140,7 +146,7 @@ export const VariantRules = class EightpiecesRules extends ChessRules { 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 = ""; @@ -169,7 +175,8 @@ export const VariantRules = class EightpiecesRules extends ChessRules { 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); @@ -189,7 +196,7 @@ export const VariantRules = class EightpiecesRules extends ChessRules { 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]; @@ -241,21 +248,23 @@ export const VariantRules = class EightpiecesRules extends ChessRules { // Because of the lancers, getPiece() could be wrong: // use board[x][y][1] instead (always valid). getBasicMove([sx, sy], [ex, ey], tr) { + const initColor = this.getColor(sx, sy); + const initPiece = this.board[sx][sy].charAt(1); let mv = new Move({ appear: [ new PiPo({ x: ex, y: ey, - c: tr ? tr.c : this.getColor(sx, sy), - p: tr ? tr.p : this.board[sx][sy].charAt(1) + c: tr ? tr.c : initColor, + p: tr ? tr.p : initPiece }) ], vanish: [ new PiPo({ x: sx, y: sy, - c: this.getColor(sx, sy), - p: this.board[sx][sy].charAt(1) + c: initColor, + p: initPiece }) ] }); @@ -284,12 +293,14 @@ export const VariantRules = class EightpiecesRules extends ChessRules { getPotentialMovesFrom([x, y]) { // At subTurn == 2, jailers aren't effective (Jeff K) + const piece = this.getPiece(x, y); + const L = this.sentryPush.length; if (this.subTurn == 1) { const jsq = this.isImmobilized([x, y]); if (!!jsq) { let moves = []; // Special pass move if king: - if (this.getPiece(x, y) == V.KING) { + if (piece == V.KING) { moves.push( new Move({ appear: [], @@ -299,11 +310,26 @@ export const VariantRules = class EightpiecesRules extends ChessRules { }) ); } + else if (piece == V.LANCER && !!this.sentryPush[L-1]) { + // A pushed lancer next to the jailer: reorient + const color = this.getColor(x, y); + const curDir = this.board[x][y].charAt(1); + Object.keys(V.LANCER_DIRS).forEach(k => { + moves.push( + new Move({ + appear: [{ x: x, y: y, c: color, p: k }], + vanish: [{ x: x, y: y, c: color, p: curDir }], + start: { x: x, y: y }, + end: { x: jsq[0], y: jsq[1] } + }) + ); + }); + } return moves; } } let moves = []; - switch (this.getPiece(x, y)) { + switch (piece) { case V.JAILER: moves = this.getPotentialJailerMoves([x, y]); break; @@ -317,12 +343,15 @@ export const VariantRules = class EightpiecesRules extends ChessRules { moves = super.getPotentialMovesFrom([x, y]); break; } - const L = this.sentryPush.length; if (!!this.sentryPush[L-1]) { - // Delete moves walking back on sentry push path + // Delete moves walking back on sentry push path, + // only if not a pawn, and the piece is the pushed one. + const pl = this.sentryPush[L-1].length; + const finalPushedSq = this.sentryPush[L-1][pl-1]; moves = moves.filter(m => { if ( m.vanish[0].p != V.PAWN && + m.start.x == finalPushedSq.x && m.start.y == finalPushedSq.y && this.sentryPush[L-1].some(sq => sq.x == m.end.x && sq.y == m.end.y) ) { return false; @@ -343,8 +372,9 @@ export const VariantRules = class EightpiecesRules extends ChessRules { const color = this.getColor(x, y); let moves = []; const [sizeX, sizeY] = [V.size.x, V.size.y]; - let shiftX = color == "w" ? -1 : 1; + let shiftX = (color == "w" ? -1 : 1); if (this.subTurn == 2) shiftX *= -1; + const firstRank = color == "w" ? sizeX - 1 : 0; const startRank = color == "w" ? sizeX - 2 : 1; const lastRank = color == "w" ? 0 : sizeX - 1; @@ -352,10 +382,9 @@ export const VariantRules = class EightpiecesRules extends ChessRules { if (!V.OnBoard(x + shiftX, y)) return []; const finalPieces = - // No promotions after pushes! - x + shiftX == lastRank && this.subTurn == 1 - ? - Object.keys(V.LANCER_DIRS).concat( + // A push cannot put a pawn on last rank (it goes backward) + x + shiftX == lastRank + ? Object.keys(V.LANCER_DIRS).concat( [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN, V.SENTRY, V.JAILER]) : [V.PAWN]; if (this.board[x + shiftX][y] == V.EMPTY) { @@ -369,7 +398,9 @@ export const VariantRules = class EightpiecesRules extends ChessRules { ); } if ( - x == startRank && + // 2-squares jumps forbidden if pawn push + this.subTurn == 1 && + [startRank, firstRank].includes(x) && this.board[x + 2 * shiftX][y] == V.EMPTY ) { // Two squares jump @@ -395,10 +426,11 @@ export const VariantRules = class EightpiecesRules extends ChessRules { } } - // En passant: + // En passant: only on subTurn == 1 const Lep = this.epSquares.length; const epSquare = this.epSquares[Lep - 1]; if ( + this.subTurn == 1 && !!epSquare && epSquare.x == x + shiftX && Math.abs(epSquare.y - y) == 1 @@ -444,6 +476,7 @@ export const VariantRules = class EightpiecesRules extends ChessRules { // Add all lancer possible orientations, similar to pawn promotions. // Except if just after a push: allow all movements from init square then const L = this.sentryPush.length; + const color = this.getColor(x, y); if (!!this.sentryPush[L-1]) { // Maybe I was pushed const pl = this.sentryPush[L-1].length; @@ -454,7 +487,6 @@ export const VariantRules = class EightpiecesRules extends ChessRules { // I was pushed: allow all directions (for this move only), but // do not change direction after moving, *except* if I keep the // same orientation in which I was pushed. - const color = this.getColor(x, y); const curDir = V.LANCER_DIRS[this.board[x][y].charAt(1)]; Object.values(V.LANCER_DIRS).forEach(step => { const dirCode = Object.keys(V.LANCER_DIRS).find(k => { @@ -507,10 +539,15 @@ export const VariantRules = class EightpiecesRules extends ChessRules { V.OnBoard(x + step[0], y + step[1]) && this.board[x + step[0]][y + step[1]] == V.EMPTY ) { + const newDirCode = Object.keys(V.LANCER_DIRS).find(k => { + const codeStep = V.LANCER_DIRS[k]; + return (codeStep[0] == step[0] && codeStep[1] == step[1]); + }); potentialNudges.push( this.getBasicMove( [x, y], - [x + step[0], y + step[1]] + [x + step[0], y + step[1]], + { c: color, p: newDirCode } ) ); } @@ -574,81 +611,6 @@ export const VariantRules = class EightpiecesRules extends ChessRules { ); } - // 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; @@ -683,11 +645,7 @@ export const VariantRules = class EightpiecesRules extends ChessRules { this.movesCount >= 2 ? filteredMoves : filteredMoves.filter(m => { - return ( - m.vanish.length <= 1 || - m.appear.length != 1 || - basicFilter(m, oppCol) - ); + return (m.vanish.length <= 1 && basicFilter(m, oppCol)); }) ).concat(movesWithSentryPushes); } @@ -699,123 +657,16 @@ export const VariantRules = class EightpiecesRules extends ChessRules { 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, colors) { + isAttacked(sq, color) { return ( - super.isAttacked(sq, colors) || - this.isAttackedByLancer(sq, colors) || - this.isAttackedBySentry(sq, colors) + super.isAttacked(sq, color) || + this.isAttackedByLancer(sq, color) || + this.isAttackedBySentry(sq, color) + // The jailer doesn't capture. ); } - isAttackedBySlideNJump([x, y], colors, piece, steps, oneStep) { + isAttackedBySlideNJump([x, y], color, piece, steps, oneStep) { for (let step of steps) { let rx = x + step[0], ry = y + step[1]; @@ -825,8 +676,8 @@ export const VariantRules = class EightpiecesRules extends ChessRules { } if ( V.OnBoard(rx, ry) && - this.getPiece(rx, ry) === piece && - colors.includes(this.getColor(rx, ry)) && + this.getPiece(rx, ry) == piece && + this.getColor(rx, ry) == color && !this.isImmobilized([rx, ry]) ) { return true; @@ -835,27 +686,25 @@ export const VariantRules = class EightpiecesRules extends ChessRules { return false; } - isAttackedByPawn([x, y], colors) { - for (let c of colors) { - const pawnShift = c == "w" ? 1 : -1; - if (x + pawnShift >= 0 && x + pawnShift < V.size.x) { - for (let i of [-1, 1]) { - if ( - y + i >= 0 && - y + i < V.size.y && - this.getPiece(x + pawnShift, y + i) == V.PAWN && - this.getColor(x + pawnShift, y + i) == c && - !this.isImmobilized([x + pawnShift, y + i]) - ) { - return true; - } + isAttackedByPawn([x, y], color) { + const pawnShift = (color == "w" ? 1 : -1); + if (x + pawnShift >= 0 && x + pawnShift < V.size.x) { + for (let i of [-1, 1]) { + if ( + y + i >= 0 && + y + i < V.size.y && + this.getPiece(x + pawnShift, y + i) == V.PAWN && + this.getColor(x + pawnShift, y + i) == color && + !this.isImmobilized([x + pawnShift, y + i]) + ) { + return true; } } } return false; } - isAttackedByLancer([x, y], colors) { + isAttackedByLancer([x, y], color) { for (let step of V.steps[V.ROOK].concat(V.steps[V.BISHOP])) { // If in this direction there are only enemy pieces and empty squares, // and we meet a lancer: can he reach us? @@ -866,7 +715,7 @@ export const VariantRules = class EightpiecesRules extends ChessRules { V.OnBoard(coord.x, coord.y) && ( this.board[coord.x][coord.y] == V.EMPTY || - colors.includes(this.getColor(coord.x, coord.y)) + this.getColor(coord.x, coord.y) == color ) ) { if ( @@ -889,18 +738,26 @@ export const VariantRules = class EightpiecesRules extends ChessRules { // 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; - const deltaY = y2 - y1; - const step = [ deltaX / Math.abs(deltaX), deltaY / Math.abs(deltaY) ]; - if (allowedSteps.every(st => st[0] != step[0] || st[1] != step[1])) + const deltaX = x2 - x1, + absDeltaX = Math.abs(deltaX); + const deltaY = y2 - y1, + absDeltaY = Math.abs(deltaY); + const step = [ deltaX / absDeltaX || 0, deltaY / absDeltaY || 0 ]; + if ( + // Check that the step is a priori valid: + (absDeltaX != absDeltaY && deltaX != 0 && deltaY != 0) || + allowedSteps.every(st => st[0] != step[0] || st[1] != step[1]) + ) { return false; + } let sq = [ x1 + step[0], y1 + step[1] ]; - while (sq[0] != x2 && sq[1] != y2) { + while (sq[0] != x2 || sq[1] != y2) { 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; } @@ -941,17 +798,17 @@ export const VariantRules = class EightpiecesRules extends ChessRules { return false; } - isAttackedBySentry([x, y], colors) { + isAttackedBySentry([x, y], color) { // Attacked by sentry means it can self-take our king. // Just check diagonals of enemy sentry(ies), and if it reaches // one of our pieces: can I self-take? - const color = V.GetOppCol(colors[0]); + const myColor = V.GetOppCol(color); let candidates = []; for (let i=0; i