client/src/variants/Koth.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 export class KothRules extends ChessRules {
   4   static get Lines() {
   5     return [
   6       [[3, 3], [3, 5]],
   7       [[3, 3], [5, 3]],
   8       [[3, 5], [5, 5]],
   9       [[5, 3], [5, 5]]
  10     ];
  11   }
  12
  13   getCurrentScore() {
  14     // Turn has changed:
  15     const color = V.GetOppCol(this.turn);
  16     if (
  17       [3,4].includes(this.kingPos[color][0]) &&
  18       [3,4].includes(this.kingPos[color][1])
  19     ) {
  20       // The middle is reached!
  21       return color == "w" ? "1-0" : "0-1";
  22     }
  23     return super.getCurrentScore();
  24   }
  25
  26   evalPosition() {
  27     // Count material:
  28     let evaluation = super.evalPosition();
  29     // Ponder with king position:
  30     return (
  31       evaluation/5 +
  32       (
  33         Math.abs(this.kingPos["w"][0] - 3.5) +
  34         Math.abs(this.kingPos["w"][1] - 3.5)
  35       ) / 2 -
  36       (
  37         Math.abs(this.kingPos["b"][0] - 3.5) +
  38         Math.abs(this.kingPos["b"][1] - 3.5)
  39       ) / 2
  40     );
  41   }
  42 };