variants/Baroque/class.js

   1 import AbstractSpecialCaptureRules from "/variants/_SpecialCaptures.js";
   2 import {FenUtil} from "/utils/setupPieces.js";
   3 import {Random} from "/utils/alea.js";
   4
   5 export default class BaroqueRules extends AbstractSpecialCaptureRules {
   6
   7   static get Options() {
   8     return {
   9       select: C.Options.Select,
  10       input: [
  11         {
  12           label: "Capture king",
  13           variable: "taking",
  14           type: "checkbox",
  15           defaut: false
  16         }
  17       ],
  18       styles: [
  19         "balance",
  20         "capture",
  21         "crazyhouse",
  22         "cylinder",
  23         "doublemove",
  24         "progressive",
  25         "recycle",
  26         "teleport"
  27       ]
  28     };
  29   }
  30
  31   get hasFlags() {
  32     return false;
  33   }
  34
  35   genRandInitBaseFen() {
  36     const s = FenUtil.setupPieces(
  37       ['r', 'n', 'b', 'q', 'k', 'b', 'n', 'i'],
  38       {
  39         randomness: this.options["randomness"],
  40         diffCol: ['b']
  41       }
  42     );
  43     if (this.options["randomness"] <= 1) {
  44       // Fix immobilizers/rooks pattern
  45       const toExchange1 = s.w.indexOf('r'),
  46             toExchange2 = s.w.indexOf('i');
  47       s.w[toExchange1] = 'i';
  48       s.w[toExchange2] = 'r';
  49     }
  50     return {
  51       fen: s.b.join("") + "/pppppppp/8/8/8/8/PPPPPPPP/" +
  52            s.w.join("").toUpperCase(),
  53       o: {}
  54     };
  55   }
  56
  57   pieces() {
  58     return Object.assign({},
  59       super.pieces(),
  60       {
  61         'p': {
  62           "class": "pawn", //pincer
  63           moves: [
  64             {steps: [[0, 1], [0, -1], [1, 0], [-1, 0]]}
  65           ]
  66         },
  67         'r': {
  68           "class": "rook", //coordinator
  69           moves: [
  70             {
  71               steps: [
  72                 [1, 0], [0, 1], [-1, 0], [0, -1],
  73                 [1, 1], [1, -1], [-1, 1], [-1, -1]
  74               ]
  75             }
  76           ]
  77         },
  78         'n': {
  79           "class": "knight", //long-leaper
  80           moveas: 'r'
  81         },
  82         'b': {
  83           "class": "bishop", //chameleon
  84           moveas: 'r'
  85         },
  86         'q': {
  87           "class": "queen", //withdrawer
  88           moveas: 'r'
  89         },
  90         'i': {
  91           "class": "immobilizer",
  92           moveas: 'r'
  93         }
  94       }
  95     );
  96   }
  97
  98   // Is piece on square (x,y) immobilized?
  99   isImmobilized([x, y]) {
 100     const piece = this.getPiece(x, y);
 101     const color = this.getColor(x, y);
 102     const oppCol = C.GetOppCol(color);
 103     const adjacentSteps = this.pieces()['k'].moves[0].steps;
 104     for (let step of adjacentSteps) {
 105       const [i, j] = [x + step[0], this.getY(y + step[1])];
 106       if (
 107         this.onBoard(i, j) &&
 108         this.board[i][j] != "" &&
 109         this.getColor(i, j) == oppCol
 110       ) {
 111         const oppPiece = this.getPiece(i, j);
 112         if (oppPiece == 'i') {
 113           // Moving is possible only if this immobilizer is neutralized
 114           for (let step2 of adjacentSteps) {
 115             const [i2, j2] = [i + step2[0], this.getY(j + step2[1])];
 116             if (i2 == x && j2 == y)
 117               continue; //skip initial piece!
 118             if (
 119               this.onBoard(i2, j2) &&
 120               this.board[i2][j2] != "" &&
 121               this.getColor(i2, j2) == color
 122             ) {
 123               if (['b', 'i'].includes(this.getPiece(i2, j2)))
 124                 return false;
 125             }
 126           }
 127           return true; //immobilizer isn't neutralized
 128         }
 129         // Chameleons can't be immobilized twice,
 130         // because there is only one immobilizer
 131         if (oppPiece == 'b' && piece == 'i')
 132           return true;
 133       }
 134     }
 135     return false;
 136   }
 137
 138   canTake([x1, y1], [x2, y2]) {
 139     // Deactivate standard captures, except for king:
 140     return (
 141       this.getPiece(x1, y1) == 'k' &&
 142       this.getColor(x1, y1) != this.getColor(x2, y2)
 143     );
 144   }
 145
 146   postProcessPotentialMoves(moves) {
 147     if (moves.length == 0)
 148       return [];
 149     switch (moves[0].vanish[0].p) {
 150       case 'p':
 151         this.addPincerCaptures(moves);
 152         break;
 153       case 'r':
 154         this.addCoordinatorCaptures(moves);
 155         break;
 156       case 'n':
 157         const [x, y] = [moves[0].start.x, moves[0].start.y];
 158         moves = moves.concat(this.getLeaperCaptures([x, y]));
 159         break;
 160       case 'b':
 161         moves = this.getChameleonCaptures(moves, "pull");
 162         break;
 163       case 'q':
 164         this.addPushmePullyouCaptures(moves, false, "pull");
 165         break;
 166     }
 167     return moves;
 168   }
 169
 170 };