client/src/variants/Tencubed.js

   1 import { ChessRules } from "@/base_rules";
   2 import { ArrayFun } from "@/utils/array";
   3 import { shuffle } from "@/utils/alea";
   4
   5 export class TencubedRules extends ChessRules {
   6   static get PawnSpecs() {
   7     return Object.assign(
   8       {},
   9       ChessRules.PawnSpecs,
  10       {
  11         initShift: { w: 2, b: 2 },
  12         promotions: [V.QUEEN, V.MARSHALL, V.ARCHBISHOP]
  13       }
  14     );
  15   }
  16
  17   static get HasFlags() {
  18     return false;
  19   }
  20
  21   getPpath(b) {
  22     return (
  23       [V.MARSHALL, V.ARCHBISHOP, V.CHAMPION, V.WIZARD].includes(b[1])
  24         ? "Tencubed/"
  25         : ""
  26     ) + b;
  27   }
  28
  29   static get size() {
  30     return { x: 10, y: 10 };
  31   }
  32
  33   // Rook + knight:
  34   static get MARSHALL() {
  35     return "m";
  36   }
  37
  38   // Bishop + knight
  39   static get ARCHBISHOP() {
  40     return "a";
  41   }
  42
  43   // Dabbabah + alfil + wazir
  44   static get CHAMPION() {
  45     return "c";
  46   }
  47
  48   // Camel + ferz
  49   static get WIZARD() {
  50     return "w";
  51   }
  52
  53   static get PIECES() {
  54     return (
  55       ChessRules.PIECES
  56       .concat([V.MARSHALL, V.ARCHBISHOP, V.CHAMPION, V.WIZARD])
  57     );
  58   }
  59
  60   static get steps() {
  61     return Object.assign(
  62       {},
  63       ChessRules.steps,
  64       {
  65         w: [
  66           [-3, -1],
  67           [-3, 1],
  68           [-1, -3],
  69           [-1, 3],
  70           [1, -3],
  71           [1, 3],
  72           [3, -1],
  73           [3, 1],
  74           [-1, -1],
  75           [-1, 1],
  76           [1, -1],
  77           [1, 1]
  78         ],
  79         c: [
  80           [1, 0],
  81           [-1, 0],
  82           [0, 1],
  83           [0, -1],
  84           [2, 2],
  85           [2, -2],
  86           [-2, 2],
  87           [-2, -2],
  88           [-2, 0],
  89           [0, -2],
  90           [2, 0],
  91           [0, 2]
  92         ]
  93       }
  94     );
  95   }
  96
  97   static GenRandInitFen(randomness) {
  98     if (randomness == 0) {
  99       return (
 100         "2cwamwc2/1rnbqkbnr1/pppppppppp/91/91/" +
 101         "91/91/PPPPPPPPPP/1RNBQKBNR1/2CWAMWC2/ " +
 102         "w 0 bibi -"
 103       );
 104     }
 105
 106     const baseFen = V.ParseFen(ChessRules.GenRandInitFen(randomness));
 107     const positionParts = baseFen.position.split("/");
 108     const bFen = (
 109       "1" + positionParts[0] +
 110       "1/pppppppppp/91/91/91/91/PPPPPPPPPP/1" +
 111       positionParts[7] + "1"
 112     );
 113     // Now just obtain randomized new pieces placements:
 114     let pieces = { w: new Array(6), b: new Array(6) };
 115     for (let c of ["w", "b"]) {
 116       if (c == 'b' && randomness == 1) {
 117         pieces['b'] = pieces['w'];
 118         break;
 119       }
 120
 121       let positions = shuffle(ArrayFun.range(6));
 122       const composition = ['w', 'w', 'c', 'c', 'a', 'm'];
 123       let rem2 = positions[0] % 2;
 124       if (rem2 == positions[1] % 2) {
 125         // Fix wizards (on different colors)
 126         for (let i=4; i<6; i++) {
 127           if (positions[i] % 2 != rem2)
 128             [positions[1], positions[i]] = [positions[i], positions[1]];
 129         }
 130       }
 131       rem2 = positions[2] % 2;
 132       if (rem2 == positions[3] % 2) {
 133         // Fix champions too: [NOTE: positions[4] & [5] should do]
 134         for (let i=4; i<6; i++) {
 135           if (positions[i] % 2 != rem2)
 136             [positions[3], positions[i]] = [positions[i], positions[3]];
 137         }
 138       }
 139       for (let i = 0; i < 9; i++) pieces[c][positions[i]] = composition[i];
 140     }
 141     return (
 142       "2" + pieces["b"].join("") + "2/" +
 143       bFen +
 144       "/2" + pieces["w"].join("").toUpperCase() + "2" +
 145       " w 0 -"
 146     );
 147   }
 148
 149   getPotentialMovesFrom([x, y]) {
 150     switch (this.getPiece(x, y)) {
 151       case V.MARSHALL:
 152         return this.getPotentialMarshallMoves([x, y]);
 153       case V.ARCHBISHOP:
 154         return this.getPotentialArchbishopMoves([x, y]);
 155       case V.CHAMPION:
 156         return this.getPotentialChampionMoves([x, y]);
 157       case V.WIZARD:
 158         return this.getPotentialWizardMoves([x, y]);
 159       default:
 160         return super.getPotentialMovesFrom([x, y]);
 161     }
 162   }
 163
 164   getPotentialMarshallMoves(sq) {
 165     return this.getSlideNJumpMoves(sq, V.steps[V.ROOK]).concat(
 166       this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep")
 167     );
 168   }
 169
 170   getPotentialArchbishopMoves(sq) {
 171     return this.getSlideNJumpMoves(sq, V.steps[V.BISHOP]).concat(
 172       this.getSlideNJumpMoves(sq, V.steps[V.KNIGHT], "oneStep")
 173     );
 174   }
 175
 176   getPotentialChampionMoves(sq) {
 177     return this.getSlideNJumpMoves(sq, V.steps[V.CHAMPION], "oneStep");
 178   }
 179
 180   getPotentialWizardMoves(sq) {
 181     return this.getSlideNJumpMoves(sq, V.steps[V.WIZARD], "oneStep");
 182   }
 183
 184   isAttacked(sq, color) {
 185     return (
 186       super.isAttacked(sq, color) ||
 187       this.isAttackedByMarshall(sq, color) ||
 188       this.isAttackedByArchbishop(sq, color) ||
 189       this.isAttackedByChampion(sq, color) ||
 190       this.isAttackedByWizard(sq, color)
 191     );
 192   }
 193
 194   isAttackedByMarshall(sq, color) {
 195     return (
 196       this.isAttackedBySlideNJump(sq, color, V.MARSHALL, V.steps[V.ROOK]) ||
 197       this.isAttackedBySlideNJump(
 198         sq,
 199         color,
 200         V.MARSHALL,
 201         V.steps[V.KNIGHT],
 202         "oneStep"
 203       )
 204     );
 205   }
 206
 207   isAttackedByArchbishop(sq, color) {
 208     return (
 209       this.isAttackedBySlideNJump(sq, color, V.ARCHBISHOP, V.steps[V.BISHOP]) ||
 210       this.isAttackedBySlideNJump(
 211         sq,
 212         color,
 213         V.ARCHBISHOP,
 214         V.steps[V.KNIGHT],
 215         "oneStep"
 216       )
 217     );
 218   }
 219
 220   isAttackedByWizard(sq, color) {
 221     return (
 222       this.isAttackedBySlideNJump(
 223         sq, color, V.WIZARD, V.steps[V.WIZARD], "oneStep")
 224     );
 225   }
 226
 227   isAttackedByChampion(sq, color) {
 228     return (
 229       this.isAttackedBySlideNJump(
 230         sq, color, V.CHAMPION, V.steps[V.CHAMPION], "oneStep")
 231     );
 232   }
 233
 234   static get SEARCH_DEPTH() {
 235     return 2;
 236   }
 237
 238   static get VALUES() {
 239     return Object.assign(
 240       {},
 241       ChessRules.VALUES,
 242       { c: 4, w: 3, a: 6, m: 8 }
 243     );
 244   }
 245 };