public/javascripts/variants/Grand.js

   1 //https://www.chessvariants.com/large.dir/freeling.html
   2 class GrandRules extends ChessRules
   3 {
   4     static getPpath(b)
   5     {
   6         const V = VariantRules;
   7         return ([V.CAMEL,V.WILDEBEEST].includes(b[1]) ? "Grand/" : "") + b;
   8     }
   9
  10     static get MARSHALL() { return 'm'; } //rook+knight
  11     static get CARDINAL() { return 'c'; } //bishop+knight
  12
  13     // ------> pas les règles exactes, on démarre en 2 avec 1,2 ou 3 cases + enPassant comme Wildebeest
  14 // TODO: IN epSquares (return array), not return singleton. Easy. Adapt
  15 // just here for now...
  16     getEpSquare(move)
  17     {
  18         const [sx,sy,ex] = [move.start.x,move.start.y,move.end.x];
  19         if (this.getPiece(sx,sy) == VariantRules.PAWN && Math.abs(sx - ex) == 2)
  20         {
  21             return {
  22                 x: (sx + ex)/2,
  23                 y: sy
  24             };
  25         }
  26         return undefined; //default
  27     }
  28
  29     getPotentialMovesFrom([x,y])
  30     {
  31         switch (this.getPiece(x,y))
  32         {
  33             case VariantRules.MARSHALL:
  34                 return this.getPotentialMarshallMoves([x,y]);
  35             case VariantRules.CARDINAL:
  36                 return this.getPotentialCardinalMoves([x,y]);
  37             default:
  38                 return super.getPotentialMovesFrom([x,y])
  39         }
  40     }
  41
  42     // TODO: quite many changes! Especially promotions, only to friendly pieces already captured. ==> keep track of captured material in initVariables()......
  43     getPotentialPawnMoves([x,y])
  44     {
  45     }
  46
  47     getPotentialMarshallMoves(sq)
  48     {
  49         const V = VariantRules;
  50         return this.getSlideNJumpMoves(sq, V.steps[V.ROOK]).concat(
  51             this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep"));
  52     }
  53
  54     getPotentialCardinalMoves(sq)
  55     {
  56         const V = VariantRules;
  57         return this.getSlideNJumpMoves(sq, V.steps[V.BISHOP]).concat(
  58             this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep"));
  59     }
  60
  61     isAttacked(sq, colors)
  62     {
  63         return (super.isAttacked(sq, colors)
  64             || this.isAttackedByMarshall(sq, colors)
  65             || this.isAttackedByCardinal(sq, colors);
  66     }
  67
  68     isAttackedByMarshall(sq, colors)
  69     {
  70         const V = VariantRules;
  71         return this.isAttackedBySlideNJump(sq, colors, V.MARSHALL, V.steps[V.ROOK])
  72             || this.isAttackedBySlideNJump(sq, colors, V.MARSHALL, V.steps[V.KNIGHT], "oneStep");
  73     }
  74
  75     isAttackedByCardinal(sq, colors)
  76     {
  77         const V = VariantRules;
  78         return this.isAttackedBySlideNJump(sq, colors, V.CARDINAL, V.steps[V.BISHOP])
  79             || this.isAttackedBySlideNJump(sq, colors, V.CARDINAL, V.steps[V.KNIGHT], "oneStep");
  80     }
  81
  82     static get VALUES() {
  83         return Object.assign(
  84             ChessRules.VALUES,
  85             {'c': 5, 'm': 7} //experimental
  86         );
  87     }
  88
  89     // TODO:
  90     static GenRandInitFen()
  91     {
  92     }
  93 }