+import { ChessRules, PiPo, Move } from "@/base_rules";
+import { XiangqiRules } from "@/variants/Xiangqi"
+
+export class MinixiangqiRules extends XiangqiRules {
+
+ static get Lines() {
+ let lines = [];
+ // Draw all inter-squares lines, shifted:
+ for (let i = 0; i < V.size.x; i++)
+ lines.push([[i+0.5, 0.5], [i+0.5, V.size.y-0.5]]);
+ for (let j = 0; j < V.size.y; j++)
+ lines.push([[0.5, j+0.5], [V.size.x-0.5, j+0.5]]);
+ // Add palaces:
+ lines.push([[0.5, 2.5], [2.5, 4.5]]);
+ lines.push([[0.5, 4.5], [2.5, 2.5]]);
+ lines.push([[4.5, 2.5], [6.5, 4.5]]);
+ lines.push([[4.5, 4.5], [6.5, 2.5]]);
+ return lines;
+ }
+
+ // No elephants or advisors
+ static get PIECES() {
+ return [V.PAWN, V.ROOK, V.KNIGHT, V.KING, V.CANNON];
+ }
+
+ getPpath(b) {
+ return "Xiangqi/" + b;
+ }
+
+ static get size() {
+ return { x: 7, y: 7};
+ }
+
+ getPotentialMovesFrom(sq) {
+ switch (this.getPiece(sq[0], sq[1])) {
+ case V.PAWN: return this.getPotentialPawnMoves(sq);
+ case V.ROOK: return super.getPotentialRookMoves(sq);
+ case V.KNIGHT: return super.getPotentialKnightMoves(sq);
+ case V.KING: return super.getPotentialKingMoves(sq);
+ case V.CANNON: return super.getPotentialCannonMoves(sq);
+ }
+ return []; //never reached
+ }
+
+ getPotentialPawnMoves([x, y]) {
+ const c = this.getColor(x, y);
+ const shiftX = (c == 'w' ? -1 : 1);
+ const lastRank = (c == 'w' && x == 0 || c == 'b' && x == 6);
+ let steps = [];
+ if (!lastRank) steps.push([shiftX, 0]);
+ if (y > 0) steps.push([0, -1]);
+ if (y < 9) steps.push([0, 1]);
+ return super.getSlideNJumpMoves([x, y], steps, "oneStep");
+ }
+
+ insidePalace(x, y, c) {
+ return (
+ (y >= 2 && y <= 4) &&
+ (
+ (c == 'w' && x >= 4) ||
+ (c == 'b' && x <= 2)
+ )
+ );
+ }
+
+ static get VALUES() {
+ return {
+ p: 2,
+ r: 9,
+ n: 4,
+ c: 4.5,
+ k: 1000
+ };
+ }
+
+ // Back to ChessRules method:
+ evalPosition() {
+ let evaluation = 0;
+ for (let i = 0; i < V.size.x; i++) {
+ for (let j = 0; j < V.size.y; j++) {
+ if (this.board[i][j] != V.EMPTY)
+ evaluation += (c == 'w' ? 1 : -1) * V.VALUES[this.getPiece(i, j)];
+ }
+ }
+ return evaluation;
+ }
+
+ // Also no randomization here
+ static GenRandInitFen() {
+ return "rcnkncr/p1ppp1p/7/7/7/P1PPP1P/RCNKNCR w 0";
+ }
+
+};
projects / vchess.git / commitdiff
