Pandemonium: promotion on last 2 ranks
[vchess.git] / client / src / variants / Kinglet.js
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1import { ChessRules } from "@/base_rules";
2import { SuicideRules } from "@/variants/Suicide";
3
4export class KingletRules extends ChessRules {
7e8a7ea1 5
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6 static get HasFlags() {
7 return false;
8 }
9
10 static get PawnSpecs() {
11 return Object.assign(
12 {},
13 ChessRules.PawnSpecs,
14 { promotions: [V.KING] }
15 );
16 }
17
18 static IsGoodPosition(position) {
19 if (position.length == 0) return false;
20 const rows = position.split("/");
21 if (rows.length != V.size.x) return false;
22 // Just check that at least one pawn of each color is there:
23 let pawns = { "w": 0, "b": 0 };
24 for (let row of rows) {
25 let sumElts = 0;
26 for (let i = 0; i < row.length; i++) {
27 const lowerRi = row[i].toLowerCase();
28 if (V.PIECES.includes(lowerRi)) {
29 if (lowerRi == 'p') pawns[row[i] == lowerRi ? "b" : "w"]++;
30 sumElts++;
31 } else {
e50a8025 32 const num = parseInt(row[i], 10);
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33 if (isNaN(num)) return false;
34 sumElts += num;
35 }
36 }
37 if (sumElts != V.size.y) return false;
38 }
39 if (Object.values(pawns).some(v => v == 0)) return false;
40 return true;
41 }
42
43 scanKings() {}
44
45 filterValid(moves) {
46 return moves;
47 }
48
49 getCheckSquares() {
50 return [];
51 }
52
53 // No variables update because no royal king + no castling
54 prePlay() {}
55 postPlay() {}
56 preUndo() {}
57 postUndo() {}
58
59 getCurrentScore() {
60 const pawnRemain = {
61 'w': this.board.some(b =>
62 b.some(cell => cell[0] == 'w' && cell[1] == 'p')),
63 'b': this.board.some(b =>
64 b.some(cell => cell[0] == 'b' && cell[1] == 'p'))
65 }
66 if (!pawnRemain['w']) return "0-1";
67 if (!pawnRemain['b']) return "1-0";
68 if (this.atLeastOneMove()) return "*";
69 // Stalemate: draw
70 return "1/2";
71 }
72
73 static GenRandInitFen(randomness) {
74 return SuicideRules.GenRandInitFen(randomness);
75 }
76
77 static get VALUES() {
78 // TODO: no clue what correct values would be
79 return {
80 p: 5,
81 r: 4,
82 n: 3,
83 b: 3,
84 q: 7,
85 k: 4
86 };
87 }
7e8a7ea1 88
34bfe151 89};