variants/Align4/class.js

   1 import ChessRules from "/base_rules.js";
   2
   3 export default class Align4Rules extends ChessRules {
   4
   5   static get Options() {
   6     return {
   7       select: [{
   8         label: "Randomness",
   9         variable: "randomness",
  10         defaut: 0,
  11         options: [
  12           {label: "Deterministic", value: 0},
  13           {label: "Random", value: 1}
  14         ]
  15       }],
  16       styles: ["atomic", "capture", "cylinder"]
  17     };
  18   }
  19
  20   get hasReserve() {
  21     return true;
  22   }
  23   get hasReserveFen() {
  24     return false;
  25   }
  26
  27   genRandInitFen(seed) {
  28     const baseFen = super.genRandInitFen(seed);
  29     const fen = baseFen.replace("rnbqkbnr/pppppppp", "4k3/8");
  30     const fenParts = fen.split(" ");
  31     let others = JSON.parse(fenParts[3]);
  32     others["flags"] = others["flags"].substr(0, 2) + "88";
  33     return fenParts.slice(0, 3).join(" ") + " " + JSON.stringify(others);
  34   }
  35
  36   initReserves() {
  37     this.reserve = { b: { p: 1 } };
  38   }
  39
  40   // Just do not update any reserve (infinite supply)
  41   updateReserve() {}
  42
  43   getCurrentScore(move) {
  44     const score = super.getCurrentScore(move);
  45     if (score != "*")
  46       return score;
  47     // Check pawns connection:
  48     for (let i = 0; i < this.size.x; i++) {
  49       for (let j = 0; j < this.size.y; j++) {
  50         if (
  51           this.board[i][j] != "" &&
  52           this.getColor(i, j) == 'b' &&
  53           this.getPiece(i, j) == 'p'
  54         ) {
  55           // Exploration "rightward + downward" is enough
  56           for (let step of [[1, 0], [0, 1], [1, 1], [-1, 1]]) {
  57             let [ii, jj] = [i + step[0], j + step[1]];
  58             let kounter = 1;
  59             while (
  60               this.onBoard(ii, jj) &&
  61               this.board[ii][jj] != "" &&
  62               this.getColor(ii, jj) == 'b' &&
  63               this.getPiece(ii, jj) == 'p'
  64             ) {
  65               kounter++;
  66               ii += step[0];
  67               jj += step[1];
  68             }
  69             if (kounter == 4)
  70               return "0-1";
  71           }
  72         }
  73       }
  74     }
  75     return "*";
  76   }
  77
  78 };