client/src/variants/Clorange.js

   1 import { ChessRules, PiPo, Move } from "@/base_rules";
   2 import { ArrayFun } from "@/utils/array";
   3
   4 export class ClorangeRules extends ChessRules {
   5   static get PawnSpecs() {
   6     return Object.assign(
   7       {},
   8       ChessRules.PawnSpecs,
   9       // TODO: pawns reaching last rank promote normally? Seems better
  10       { promotions: [V.PAWN] }
  11     );
  12   }
  13
  14   static IsGoodFen(fen) {
  15     if (!ChessRules.IsGoodFen(fen)) return false;
  16     const fenParsed = V.ParseFen(fen);
  17     // 5) Check reserves
  18     if (!fenParsed.reserve || !fenParsed.reserve.match(/^[0-9]{20,20}$/))
  19       return false;
  20     return true;
  21   }
  22
  23   static ParseFen(fen) {
  24     const fenParts = fen.split(" ");
  25     return Object.assign(
  26       ChessRules.ParseFen(fen),
  27       { reserve: fenParts[5] }
  28     );
  29   }
  30
  31   static GenRandInitFen(randomness) {
  32     // Capturing and non-capturing reserves:
  33     return ChessRules.GenRandInitFen(randomness) + " 00000000000000000000";
  34   }
  35
  36   getFen() {
  37     return super.getFen() + " " + this.getReserveFen();
  38   }
  39
  40   getFenForRepeat() {
  41     return super.getFenForRepeat() + "_" + this.getReserveFen();
  42   }
  43
  44   getReserveFen() {
  45     let counts = new Array(10);
  46     for (
  47       let i = 0;
  48       i < V.PIECES.length - 1;
  49       i++ //-1: no king reserve
  50     ) {
  51       // TODO: adapt
  52       counts[i] = this.reserve["w"][V.PIECES[i]];
  53       counts[5 + i] = this.reserve["b"][V.PIECES[i]];
  54     }
  55     return counts.join("");
  56   }
  57
  58   setOtherVariables(fen) {
  59     super.setOtherVariables(fen);
  60     const fenParsed = V.ParseFen(fen);
  61     // Also init reserves (used by the interface to show landable pieces)
  62     // TODO: adapt
  63     this.reserve = {
  64       w: {
  65         [V.PAWN]: parseInt(fenParsed.reserve[0]),
  66         [V.ROOK]: parseInt(fenParsed.reserve[1]),
  67         [V.KNIGHT]: parseInt(fenParsed.reserve[2]),
  68         [V.BISHOP]: parseInt(fenParsed.reserve[3]),
  69         [V.QUEEN]: parseInt(fenParsed.reserve[4])
  70       },
  71       b: {
  72         [V.PAWN]: parseInt(fenParsed.reserve[5]),
  73         [V.ROOK]: parseInt(fenParsed.reserve[6]),
  74         [V.KNIGHT]: parseInt(fenParsed.reserve[7]),
  75         [V.BISHOP]: parseInt(fenParsed.reserve[8]),
  76         [V.QUEEN]: parseInt(fenParsed.reserve[9])
  77       }
  78     };
  79   }
  80
  81   getColor(i, j) {
  82     if (i >= V.size.x) return i == V.size.x ? "w" : "b";
  83     return this.board[i][j].charAt(0);
  84   }
  85
  86   getPiece(i, j) {
  87     if (i >= V.size.x) return V.RESERVE_PIECES[j];
  88     return this.board[i][j].charAt(1);
  89   }
  90
  91   getReservePpath(index, color) {
  92     return color + V.RESERVE_PIECES[index];
  93   }
  94
  95   static get NON_VIOLENT() {
  96     return ['s', 'u', 'o', 'c', 't', 'l'];
  97   }
  98
  99   // Ordering on reserve pieces
 100   static get RESERVE_PIECES() {
 101     return ChessRules.PIECES.concat(V.NON_VIOLENT);
 102   }
 103
 104   getReserveMoves([x, y]) {
 105     const color = this.turn;
 106     const p = V.RESERVE_PIECES[y];
 107     if (this.reserve[color][p] == 0) return [];
 108     let moves = [];
 109     const pawnShift = p == V.PAWN ? 1 : 0;
 110     for (let i = pawnShift; i < V.size.x - pawnShift; i++) {
 111       for (let j = 0; j < V.size.y; j++) {
 112         if (this.board[i][j] == V.EMPTY) {
 113           let mv = new Move({
 114             appear: [
 115               new PiPo({
 116                 x: i,
 117                 y: j,
 118                 c: color,
 119                 p: p
 120               })
 121             ],
 122             vanish: [],
 123             start: { x: x, y: y }, //a bit artificial...
 124             end: { x: i, y: j }
 125           });
 126           moves.push(mv);
 127         }
 128       }
 129     }
 130     return moves;
 131   }
 132
 133   // TODO: adapt all below:
 134   getPotentialMovesFrom([x, y]) {
 135     if (x >= V.size.x) {
 136       // Reserves, outside of board: x == sizeX(+1)
 137       return this.getReserveMoves([x, y]);
 138     }
 139     // Standard moves
 140     return super.getPotentialMovesFrom([x, y]);
 141   }
 142
 143   getPotentialPawnMoves([x, y]) {
 144
 145     let moves = super.getPotentialPawnMoves([x, y]);
 146     // Remove pawns on 8th rank ("fallen"):
 147     const color = this.turn;
 148     const lastRank = (color == "w" ? 0 : V.size.x - 1);
 149     moves.forEach(m => {
 150       if (m.appear[0].x == lastRank) m.appear.pop();
 151     });
 152     return moves;
 153   }
 154
 155   getAllValidMoves() {
 156     let moves = super.getAllPotentialMoves();
 157     const color = this.turn;
 158     for (let i = 0; i < V.RESERVE_PIECES.length; i++) {
 159       moves = moves.concat(
 160         this.getReserveMoves([V.size.x + (color == "w" ? 0 : 1), i])
 161       );
 162     }
 163     return this.filterValid(moves);
 164   }
 165
 166   atLeastOneMove() {
 167     if (!super.atLeastOneMove()) {
 168       // Search one reserve move
 169       for (let i = 0; i < V.RESERVE_PIECES.length; i++) {
 170         let moves = this.filterValid(
 171           this.getReserveMoves([V.size.x + (this.turn == "w" ? 0 : 1), i])
 172         );
 173         if (moves.length > 0) return true;
 174       }
 175       return false;
 176     }
 177     return true;
 178   }
 179
 180   canTake([x1, y1], [x2, y2]) {
 181     // Self-captures allowed, except for the king:
 182     return this.getPiece(x2, y2) != V.KING;
 183   }
 184
 185   prePlay(move) {
 186     super.prePlay(move);
 187     // Skip castle:
 188     if (move.vanish.length == 2 && move.appear.length == 2) return;
 189     const color = this.turn;
 190     if (move.vanish.length == 0) this.reserve[color][move.appear[0].p]--;
 191     else if (move.vanish.length == 2 && move.vanish[1].c == color)
 192       // Self-capture
 193       this.reserve[color][move.vanish[1].p]++;
 194   }
 195
 196   postUndo(move) {
 197     super.postUndo(move);
 198     if (move.vanish.length == 2 && move.appear.length == 2) return;
 199     const color = this.turn;
 200     if (move.vanish.length == 0) this.reserve[color][move.appear[0].p]++;
 201     else if (move.vanish.length == 2 && move.vanish[1].c == color)
 202       this.reserve[color][move.vanish[1].p]--;
 203   }
 204
 205   static get SEARCH_DEPTH() {
 206     return 2;
 207   }
 208
 209   evalPosition() {
 210     let evaluation = super.evalPosition();
 211     // Add reserves:
 212     for (let i = 0; i < V.RESERVE_PIECES.length; i++) {
 213       const p = V.RESERVE_PIECES[i];
 214       evaluation += this.reserve["w"][p] * V.VALUES[p];
 215       evaluation -= this.reserve["b"][p] * V.VALUES[p];
 216     }
 217     return evaluation;
 218   }
 219
 220   getNotation(move) {
 221     const finalSquare = V.CoordsToSquare(move.end);
 222     if (move.vanish.length > 0) {
 223       if (move.appear.length > 0) {
 224         // Standard move
 225         return super.getNotation(move);
 226       } else {
 227         // Pawn fallen: capturing or not
 228         let res = "";
 229         if (move.vanish.length == 2)
 230           res += V.CoordToColumn(move.start.y) + "x";
 231         return res + finalSquare;
 232       }
 233     }
 234     // Rebirth:
 235     const piece =
 236       move.appear[0].p != V.PAWN ? move.appear[0].p.toUpperCase() : "";
 237     return piece + "@" + V.CoordsToSquare(move.end);
 238   }
 239 };