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f9385686 BA |
1 | import { ChessRules } from "@/base_rules"; |
2 | ||
3 | export class HordeRules extends ChessRules { | |
4 | static get HasFlags() { | |
5 | return false; | |
6 | } | |
7 | ||
8 | static IsGoodPosition() { | |
9 | // At least one white unit, and exactly one black king: | |
10 | if (position.length == 0) return false; | |
11 | const rows = position.split("/"); | |
12 | if (rows.length != V.size.x) return false; | |
13 | let things = { "k": 0, "w": false }; | |
14 | for (let row of rows) { | |
15 | let sumElts = 0; | |
16 | for (let i = 0; i < row.length; i++) { | |
17 | if (row[i] == 'k') things['k']++; | |
18 | if (V.PIECES.includes(row[i].toLowerCase())) { | |
19 | const rowCharCode = row[i].charCodeAt(0); | |
20 | if (rowCharCode >= 65 && rowCharCode <= 90) { | |
21 | // No white king: | |
22 | if (row[i] == 'K') return false; | |
23 | if (!things['w']) things['w'] = true; | |
24 | } | |
25 | sumElts++; | |
26 | } else { | |
27 | const num = parseInt(row[i]); | |
28 | if (isNaN(num)) return false; | |
29 | sumElts += num; | |
30 | } | |
31 | } | |
32 | if (sumElts != V.size.y) return false; | |
33 | } | |
34 | if (things[''] != 1 || !things['w']) return false; | |
35 | return true; | |
36 | } | |
37 | ||
38 | static GenRandInitFen(randomness) { | |
39 | if (randomness == 2) randomness--; | |
40 | const fen = ChessRules.GenRandInitFen(randomness); | |
41 | return ( | |
5a187b07 BA |
42 | // 20 first chars are 3 rows + 3 slashes |
43 | fen.substr(0, 20) | |
f9385686 BA |
44 | // En passant available, but no castle: |
45 | .concat("1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP w 0 -") | |
46 | ); | |
47 | } | |
48 | ||
5a187b07 BA |
49 | filterValid(moves) { |
50 | if (this.turn == 'w') return moves; | |
51 | return super.filterValid(moves); | |
52 | } | |
53 | ||
af34341d BA |
54 | getCheckSquares() { |
55 | if (this.turn == 'w') return []; | |
5a187b07 BA |
56 | return ( |
57 | this.underCheck('b') | |
58 | ? [JSON.parse(JSON.stringify(this.kingPos['b']))] | |
59 | : [] | |
60 | ); | |
61 | } | |
62 | ||
f9385686 BA |
63 | getCurrentScore() { |
64 | if (this.turn == 'w') { | |
65 | // Do I have any unit remaining? If not, I lost. | |
66 | // If yes and no available move, draw. | |
67 | let somethingRemains = false; | |
68 | outerLoop: for (let i=0; i<8; i++) { | |
69 | for (let j=0; j<8; j++) { | |
70 | if (this.board[i][j] != V.EMPTY && this.getColor(i, j) == 'w') { | |
71 | somethingRemains = true; | |
72 | break outerLoop; | |
73 | } | |
74 | } | |
75 | } | |
76 | if (!somethingRemains) return "0-1"; | |
77 | if (this.atLeastOneMove()) return "*"; | |
78 | return "1/2"; | |
79 | } | |
80 | // From black side, just run usual checks: | |
81 | return super.getCurrentScore(); | |
82 | } | |
83 | }; |