X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FCheckered.js;fp=client%2Fsrc%2Fvariants%2FCheckered.js;h=0000000000000000000000000000000000000000;hb=af34341d92d47d14f396e7f4adb81f2a7e9d9a61;hp=ecf25817e7251b44c628f44729af17d2f1cb3081;hpb=fef153df51fe60a5af4c5b2a05e0b1177187bf62;p=vchess.git

diff --git a/client/src/variants/Checkered.js b/client/src/variants/Checkered.js
deleted file mode 100644
index ecf25817..00000000
--- a/client/src/variants/Checkered.js
+++ /dev/null
@@ -1,454 +0,0 @@
-import { ChessRules, Move, PiPo } from "@/base_rules";
-
-export class CheckeredRules extends ChessRules {
-  static board2fen(b) {
-    const checkered_codes = {
-      p: "s",
-      q: "t",
-      r: "u",
-      b: "c",
-      n: "o"
-    };
-    if (b[0] == "c") return checkered_codes[b[1]];
-    return ChessRules.board2fen(b);
-  }
-
-  static fen2board(f) {
-    // Tolerate upper-case versions of checkered pieces (why not?)
-    const checkered_pieces = {
-      s: "p",
-      S: "p",
-      t: "q",
-      T: "q",
-      u: "r",
-      U: "r",
-      c: "b",
-      C: "b",
-      o: "n",
-      O: "n"
-    };
-    if (Object.keys(checkered_pieces).includes(f))
-      return "c" + checkered_pieces[f];
-    return ChessRules.fen2board(f);
-  }
-
-  static get PIECES() {
-    return ChessRules.PIECES.concat(["s", "t", "u", "c", "o"]);
-  }
-
-  getPpath(b) {
-    return (b[0] == "c" ? "Checkered/" : "") + b;
-  }
-
-  setOtherVariables(fen) {
-    super.setOtherVariables(fen);
-    // Local stack of non-capturing checkered moves:
-    this.cmoves = [];
-    const cmove = V.ParseFen(fen).cmove;
-    if (cmove == "-") this.cmoves.push(null);
-    else {
-      this.cmoves.push({
-        start: ChessRules.SquareToCoords(cmove.substr(0, 2)),
-        end: ChessRules.SquareToCoords(cmove.substr(2))
-      });
-    }
-  }
-
-  static IsGoodFen(fen) {
-    if (!ChessRules.IsGoodFen(fen)) return false;
-    const fenParts = fen.split(" ");
-    if (fenParts.length != 6) return false;
-    if (fenParts[5] != "-" && !fenParts[5].match(/^([a-h][1-8]){2}$/))
-      return false;
-    return true;
-  }
-
-  static IsGoodFlags(flags) {
-    // 4 for castle + 16 for pawns
-    return !!flags.match(/^[a-z]{4,4}[01]{16,16}$/);
-  }
-
-  setFlags(fenflags) {
-    super.setFlags(fenflags); //castleFlags
-    this.pawnFlags = {
-      w: [...Array(8)], //pawns can move 2 squares?
-      b: [...Array(8)]
-    };
-    const flags = fenflags.substr(4); //skip first 4 letters, for castle
-    for (let c of ["w", "b"]) {
-      for (let i = 0; i < 8; i++)
-        this.pawnFlags[c][i] = flags.charAt((c == "w" ? 0 : 8) + i) == "1";
-    }
-  }
-
-  aggregateFlags() {
-    return [this.castleFlags, this.pawnFlags];
-  }
-
-  disaggregateFlags(flags) {
-    this.castleFlags = flags[0];
-    this.pawnFlags = flags[1];
-  }
-
-  getEpSquare(moveOrSquare) {
-    if (typeof moveOrSquare !== "object" || moveOrSquare.appear[0].c != 'c')
-      return super.getEpSquare(moveOrSquare);
-    // Checkered move: no en-passant
-    return undefined;
-  }
-
-  getCmove(move) {
-    if (move.appear[0].c == "c" && move.vanish.length == 1)
-      return { start: move.start, end: move.end };
-    return null;
-  }
-
-  canTake([x1, y1], [x2, y2]) {
-    const color1 = this.getColor(x1, y1);
-    const color2 = this.getColor(x2, y2);
-    // Checkered aren't captured
-    return (
-      color1 != color2 &&
-      color2 != "c" &&
-      (color1 != "c" || color2 != this.turn)
-    );
-  }
-
-  // Post-processing: apply "checkerization" of standard moves
-  getPotentialMovesFrom([x, y]) {
-    let standardMoves = super.getPotentialMovesFrom([x, y]);
-    const lastRank = this.turn == "w" ? 0 : 7;
-    // King is treated differently: it never turn checkered
-    if (this.getPiece(x, y) == V.KING) return standardMoves;
-    let moves = [];
-    standardMoves.forEach(m => {
-      if (m.vanish[0].p == V.PAWN) {
-        if (
-          Math.abs(m.end.x - m.start.x) == 2 &&
-          !this.pawnFlags[this.turn][m.start.y]
-        ) {
-          return; //skip forbidden 2-squares jumps
-        }
-        if (
-          this.board[m.end.x][m.end.y] == V.EMPTY &&
-          m.vanish.length == 2 &&
-          this.getColor(m.start.x, m.start.y) == "c"
-        ) {
-          return; //checkered pawns cannot take en-passant
-        }
-      }
-      if (m.vanish.length == 1)
-        // No capture
-        moves.push(m);
-      else {
-        // A capture occured (m.vanish.length == 2)
-        m.appear[0].c = "c";
-        moves.push(m);
-        if (
-          // Avoid promotions (already treated):
-          m.appear[0].p != m.vanish[1].p &&
-          (m.vanish[0].p != V.PAWN || m.end.x != lastRank)
-        ) {
-          // Add transformation into captured piece
-          let m2 = JSON.parse(JSON.stringify(m));
-          m2.appear[0].p = m.vanish[1].p;
-          moves.push(m2);
-        }
-      }
-    });
-    return moves;
-  }
-
-  getPotentialPawnMoves([x, y]) {
-    let moves = super.getPotentialPawnMoves([x, y]);
-    // Post-process: set right color for checkered moves
-    if (this.getColor(x, y) == 'c')
-      moves.forEach(m => {
-        m.appear[0].c = 'c'; //may be done twice if capture
-        m.vanish[0].c = 'c';
-      });
-    return moves;
-  }
-
-  canIplay(side, [x, y]) {
-    return side == this.turn && [side, "c"].includes(this.getColor(x, y));
-  }
-
-  // Does m2 un-do m1 ? (to disallow undoing checkered moves)
-  oppositeMoves(m1, m2) {
-    return (
-      !!m1 &&
-      m2.appear[0].c == "c" &&
-      m2.appear.length == 1 &&
-      m2.vanish.length == 1 &&
-      m1.start.x == m2.end.x &&
-      m1.end.x == m2.start.x &&
-      m1.start.y == m2.end.y &&
-      m1.end.y == m2.start.y
-    );
-  }
-
-  filterValid(moves) {
-    if (moves.length == 0) return [];
-    const color = this.turn;
-    const L = this.cmoves.length; //at least 1: init from FEN
-    return moves.filter(m => {
-      if (this.oppositeMoves(this.cmoves[L - 1], m)) return false;
-      this.play(m);
-      const res = !this.underCheck(color);
-      this.undo(m);
-      return res;
-    });
-  }
-
-  getAllValidMoves() {
-    const oppCol = V.GetOppCol(this.turn);
-    let potentialMoves = [];
-    for (let i = 0; i < V.size.x; i++) {
-      for (let j = 0; j < V.size.y; j++) {
-        // NOTE: just testing == color isn't enough because of checkred pieces
-        if (this.board[i][j] != V.EMPTY && this.getColor(i, j) != oppCol) {
-          Array.prototype.push.apply(
-            potentialMoves,
-            this.getPotentialMovesFrom([i, j])
-          );
-        }
-      }
-    }
-    return this.filterValid(potentialMoves);
-  }
-
-  atLeastOneMove() {
-    const oppCol = V.GetOppCol(this.turn);
-    for (let i = 0; i < V.size.x; i++) {
-      for (let j = 0; j < V.size.y; j++) {
-        // NOTE: just testing == color isn't enough because of checkered pieces
-        if (this.board[i][j] != V.EMPTY && this.getColor(i, j) != oppCol) {
-          const moves = this.getPotentialMovesFrom([i, j]);
-          if (moves.length > 0) {
-            for (let k = 0; k < moves.length; k++) {
-              if (this.filterValid([moves[k]]).length > 0) return true;
-            }
-          }
-        }
-      }
-    }
-    return false;
-  }
-
-  // colors: array, generally 'w' and 'c' or 'b' and 'c'
-  isAttacked(sq, colors) {
-    if (!Array.isArray(colors)) colors = [colors];
-    return (
-      this.isAttackedByPawn(sq, colors) ||
-      this.isAttackedByRook(sq, colors) ||
-      this.isAttackedByKnight(sq, colors) ||
-      this.isAttackedByBishop(sq, colors) ||
-      this.isAttackedByQueen(sq, colors) ||
-      this.isAttackedByKing(sq, colors)
-    );
-  }
-
-  isAttackedByPawn([x, y], colors) {
-    for (let c of colors) {
-      const color = (c == "c" ? this.turn : c);
-      let pawnShift = color == "w" ? 1 : -1;
-      if (x + pawnShift >= 0 && x + pawnShift < 8) {
-        for (let i of [-1, 1]) {
-          if (
-            y + i >= 0 &&
-            y + i < 8 &&
-            this.getPiece(x + pawnShift, y + i) == V.PAWN &&
-            this.getColor(x + pawnShift, y + i) == c
-          ) {
-            return true;
-          }
-        }
-      }
-    }
-    return false;
-  }
-
-  isAttackedBySlideNJump([x, y], colors, piece, steps, oneStep) {
-    for (let step of steps) {
-      let rx = x + step[0],
-          ry = y + step[1];
-      while (V.OnBoard(rx, ry) && this.board[rx][ry] == V.EMPTY && !oneStep) {
-        rx += step[0];
-        ry += step[1];
-      }
-      if (
-        V.OnBoard(rx, ry) &&
-        this.getPiece(rx, ry) === piece &&
-        colors.includes(this.getColor(rx, ry))
-      ) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  isAttackedByRook(sq, colors) {
-    return this.isAttackedBySlideNJump(sq, colors, V.ROOK, V.steps[V.ROOK]);
-  }
-
-  isAttackedByKnight(sq, colors) {
-    return this.isAttackedBySlideNJump(
-      sq,
-      colors,
-      V.KNIGHT,
-      V.steps[V.KNIGHT],
-      "oneStep"
-    );
-  }
-
-  isAttackedByBishop(sq, colors) {
-    return this.isAttackedBySlideNJump(
-      sq, colors, V.BISHOP, V.steps[V.BISHOP]);
-  }
-
-  isAttackedByQueen(sq, colors) {
-    return this.isAttackedBySlideNJump(
-      sq,
-      colors,
-      V.QUEEN,
-      V.steps[V.ROOK].concat(V.steps[V.BISHOP])
-    );
-  }
-
-  isAttackedByKing(sq, colors) {
-    return this.isAttackedBySlideNJump(
-      sq,
-      colors,
-      V.KING,
-      V.steps[V.ROOK].concat(V.steps[V.BISHOP]),
-      "oneStep"
-    );
-  }
-
-  underCheck(color) {
-    return this.isAttacked(this.kingPos[color], [V.GetOppCol(color), "c"]);
-  }
-
-  getCheckSquares(color) {
-    // Artifically change turn, for checkered pawns
-    this.turn = V.GetOppCol(color);
-    const kingAttacked = this.isAttacked(this.kingPos[color], [
-      V.GetOppCol(color),
-      "c"
-    ]);
-    let res = kingAttacked
-      ? [JSON.parse(JSON.stringify(this.kingPos[color]))]
-      : [];
-    this.turn = color;
-    return res;
-  }
-
-  postPlay(move) {
-    super.postPlay(move);
-    // Does this move turn off a 2-squares pawn flag?
-    if ([1, 6].includes(move.start.x) && move.vanish[0].p == V.PAWN)
-      this.pawnFlags[move.start.x == 6 ? "w" : "b"][move.start.y] = false;
-    this.cmoves.push(this.getCmove(move));
-  }
-
-  postUndo(move) {
-    super.postUndo(move);
-    this.cmoves.pop();
-  }
-
-  getCurrentScore() {
-    if (this.atLeastOneMove()) return "*";
-    const color = this.turn;
-    // Artifically change turn, for checkered pawns
-    this.turn = V.GetOppCol(this.turn);
-    const res = this.isAttacked(this.kingPos[color], [V.GetOppCol(color), "c"])
-      ? color == "w"
-        ? "0-1"
-        : "1-0"
-      : "1/2";
-    this.turn = V.GetOppCol(this.turn);
-    return res;
-  }
-
-  evalPosition() {
-    let evaluation = 0;
-    // Just count material for now, considering checkered neutral (...)
-    for (let i = 0; i < V.size.x; i++) {
-      for (let j = 0; j < V.size.y; j++) {
-        if (this.board[i][j] != V.EMPTY) {
-          const sqColor = this.getColor(i, j);
-          if (["w","b"].includes(sqColor)) {
-            const sign = sqColor == "w" ? 1 : -1;
-            evaluation += sign * V.VALUES[this.getPiece(i, j)];
-          }
-        }
-      }
-    }
-    return evaluation;
-  }
-
-  static GenRandInitFen(randomness) {
-    // Add 16 pawns flags + empty cmove:
-    return ChessRules.GenRandInitFen(randomness)
-      .slice(0, -2) + "1111111111111111 - -";
-  }
-
-  static ParseFen(fen) {
-    return Object.assign(
-      ChessRules.ParseFen(fen),
-      { cmove: fen.split(" ")[5] }
-    );
-  }
-
-  getFen() {
-    const L = this.cmoves.length;
-    const cmoveFen =
-      !this.cmoves[L - 1]
-        ? "-"
-        : ChessRules.CoordsToSquare(this.cmoves[L - 1].start) +
-          ChessRules.CoordsToSquare(this.cmoves[L - 1].end);
-    return super.getFen() + " " + cmoveFen;
-  }
-
-  getFlagsFen() {
-    let fen = super.getFlagsFen();
-    // Add pawns flags
-    for (let c of ["w", "b"])
-      for (let i = 0; i < 8; i++) fen += (this.pawnFlags[c][i] ? "1" : "0");
-    return fen;
-  }
-
-  static get SEARCH_DEPTH() {
-    return 2;
-  }
-
-  getNotation(move) {
-    if (move.appear.length == 2) {
-      // Castle
-      if (move.end.y < move.start.y) return "0-0-0";
-      return "0-0";
-    }
-
-    const finalSquare = V.CoordsToSquare(move.end);
-    const piece = this.getPiece(move.start.x, move.start.y);
-    let notation = "";
-    if (piece == V.PAWN) {
-      // Pawn move
-      if (move.vanish.length > 1) {
-        // Capture
-        const startColumn = V.CoordToColumn(move.start.y);
-        notation = startColumn + "x" + finalSquare;
-      } else notation = finalSquare;
-    } else {
-      // Piece movement
-      notation =
-        piece.toUpperCase() +
-        (move.vanish.length > 1 ? "x" : "") +
-        finalSquare;
-    }
-    if (move.appear[0].p != move.vanish[0].p)
-      notation += "=" + move.appear[0].p.toUpperCase();
-    return notation;
-  }
-};