variants/Copycat/class.js

   1 import ChessRules from "/base_rules.js";
   2
   3 // TODO: there was an issue: I forgot which.. TOFIND and TOFIX :)
   4
   5 export default class CopycatRules extends ChessRules {
   6
   7   static get Options() {
   8     return {
   9       select: C.Options.select,
  10       input: C.Options.input,
  11       styles: C.Options.styles.filter(s => !["madrasi", "zen"].includes(s))
  12     };
  13   }
  14
  15   getStepSpec(color, x, y) {
  16     let res = super.getStepSpec(color, x, y);
  17     const piece = this.getPiece(x,y);
  18     if (['p', 'k'].includes(piece))
  19       return res;
  20     // Now check if the piece at x, y attack some friendly one (enhancement)
  21     let movements = {};
  22     const steps = this.pieces()[piece].both[0].steps;
  23     steps.forEach(s => {
  24       let [i, j] = [x + s[0], y + s[1]];
  25       while (
  26         this.onBoard(i, j) &&
  27         this.board[i][j] == "" &&
  28         piece != 'n'
  29       ) {
  30         i += s[0];
  31         j += s[1];
  32       }
  33       if (this.onBoard(i, j) && this.getColor(i, j) == color) {
  34         const attacked = this.getPiece(i, j);
  35         if (['r', 'b', 'n'].includes(attacked)) {
  36           if (!movements[attacked])
  37             movements[attacked] = true;
  38         }
  39         else if (attacked == 'q') {
  40           if (!movements['r'])
  41             movements['r'] = true;
  42           if (!movements['b'])
  43             movements['b'] = true;
  44         }
  45       }
  46     });
  47     Object.keys(movements).forEach(type => {
  48       if ((piece != 'q' && type != piece) || (piece == 'q' && type == 'n'))
  49         res.both.push(this.pieces()[type].both[0]);
  50     });
  51     return res;
  52   }
  53
  54 };