client/src/variants/Koth.js

   1 import { ChessRules } from "@/base_rules";
   2
   3 export class KothRules extends ChessRules {
   4
   5   static get Lines() {
   6     return [
   7       [[3, 3], [3, 5]],
   8       [[3, 3], [5, 3]],
   9       [[3, 5], [5, 5]],
  10       [[5, 3], [5, 5]]
  11     ];
  12   }
  13
  14   getCurrentScore() {
  15     // Turn has changed:
  16     const color = V.GetOppCol(this.turn);
  17     if (
  18       [3,4].includes(this.kingPos[color][0]) &&
  19       [3,4].includes(this.kingPos[color][1])
  20     ) {
  21       // The middle is reached!
  22       return color == "w" ? "1-0" : "0-1";
  23     }
  24     return super.getCurrentScore();
  25   }
  26
  27   evalPosition() {
  28     // Count material:
  29     let evaluation = super.evalPosition();
  30     // Ponder with king position:
  31     return (
  32       evaluation/5 +
  33       (
  34         Math.abs(this.kingPos["w"][0] - 3.5) +
  35         Math.abs(this.kingPos["w"][1] - 3.5)
  36       ) / 2 -
  37       (
  38         Math.abs(this.kingPos["b"][0] - 3.5) +
  39         Math.abs(this.kingPos["b"][1] - 3.5)
  40       ) / 2
  41     );
  42   }
  43
  44 };