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c3a86f01 BA |
1 | import { ChessRules } from "@/base_rules"; |
2 | ||
32f6285e | 3 | export class ArenaRules extends ChessRules { |
3a2a7b5f | 4 | static get HasFlags() { |
c3a86f01 BA |
5 | return false; |
6 | } | |
7 | ||
32f6285e BA |
8 | static get PawnSpecs() { |
9 | return Object.assign( | |
10 | {}, | |
11 | ChessRules.PawnSpecs, | |
12 | { captureBackward: true } | |
13 | ); | |
14 | } | |
15 | ||
6f2f9437 BA |
16 | static IsGoodPosition(position) { |
17 | if (position.length == 0) return false; | |
18 | const rows = position.split("/"); | |
19 | if (rows.length != V.size.x) return false; | |
20 | // At most and at least one king or queen per color | |
21 | let royals = { "k": 0, "K": 0, "q": 0, "Q": 0 }; | |
22 | for (let row of rows) { | |
23 | let sumElts = 0; | |
24 | for (let i = 0; i < row.length; i++) { | |
25 | if (['K','k','Q','q'].includes(row[i])) royals[row[i]]++; | |
26 | if (V.PIECES.includes(row[i].toLowerCase())) sumElts++; | |
27 | else { | |
28 | const num = parseInt(row[i]); | |
29 | if (isNaN(num)) return false; | |
30 | sumElts += num; | |
31 | } | |
32 | } | |
33 | if (sumElts != V.size.y) return false; | |
34 | } | |
35 | if ( | |
36 | Object.values(royals).some(v => v >= 2) || | |
37 | royals['K'] + royals['Q'] == 0 || | |
38 | royals['k'] + royals['q'] == 0 | |
39 | ) { | |
40 | return false; | |
41 | } | |
42 | return true; | |
43 | } | |
44 | ||
45 | scanKings() {} | |
46 | ||
7ba4a5bc | 47 | static GenRandInitFen(randomness) { |
3a2a7b5f | 48 | return ChessRules.GenRandInitFen(randomness).slice(0, -6) + "-"; |
c3a86f01 BA |
49 | } |
50 | ||
51 | static InArena(x) { | |
52 | return Math.abs(3.5 - x) <= 1.5; | |
53 | } | |
54 | ||
55 | getPotentialMovesFrom([x, y]) { | |
56 | const moves = super.getPotentialMovesFrom([x, y]); | |
57 | // Eliminate moves which neither enter the arena or capture something | |
58 | return moves.filter(m => { | |
59 | const startInArena = V.InArena(m.start.x); | |
60 | const endInArena = V.InArena(m.end.x); | |
61 | return ( | |
62 | (startInArena && endInArena && m.vanish.length == 2) || | |
63 | (!startInArena && endInArena) | |
64 | ); | |
65 | }); | |
66 | ||
67 | return moves; | |
68 | } | |
69 | ||
c3a86f01 BA |
70 | getPotentialQueenMoves(sq) { |
71 | return this.getSlideNJumpMoves( | |
72 | sq, | |
73 | V.steps[V.ROOK].concat(V.steps[V.BISHOP]) | |
74 | ).filter(m => { | |
75 | // Filter out moves longer than 3 squares | |
76 | return Math.max( | |
77 | Math.abs(m.end.x - m.start.x), | |
78 | Math.abs(m.end.y - m.start.y)) <= 3; | |
79 | }); | |
80 | } | |
81 | ||
82 | getPotentialKingMoves(sq) { | |
83 | return this.getSlideNJumpMoves( | |
84 | sq, | |
85 | V.steps[V.ROOK].concat(V.steps[V.BISHOP]) | |
86 | ).filter(m => { | |
87 | // Filter out moves longer than 3 squares | |
88 | return Math.max( | |
89 | Math.abs(m.end.x - m.start.x), | |
90 | Math.abs(m.end.y - m.start.y)) <= 3; | |
91 | }); | |
92 | } | |
93 | ||
94 | getCheckSquares() { | |
95 | return []; | |
96 | } | |
97 | ||
98 | filterValid(moves) { | |
99 | // No check conditions | |
100 | return moves; | |
101 | } | |
102 | ||
57d9b2c4 BA |
103 | postPlay() {} //no kingPos no castleFlags |
104 | postUndo() {} | |
105 | ||
c3a86f01 BA |
106 | getCurrentScore() { |
107 | const color = this.turn; | |
108 | if (!this.atLeastOneMove()) | |
109 | // I cannot move anymore | |
110 | return color == "w" ? "0-1" : "1-0"; | |
111 | // Win if the opponent has no more pieces left (in the Arena), | |
112 | // (and/)or if he lost both his dukes. | |
113 | let someUnitRemain = false; | |
114 | let atLeastOneDuke = false; | |
115 | let somethingInArena = false; | |
116 | outerLoop: for (let i=0; i<V.size.x; i++) { | |
117 | for (let j=0; j<V.size.y; j++) { | |
118 | if (this.getColor(i,j) == color) { | |
119 | someUnitRemain = true; | |
120 | if (this.movesCount >= 2 && V.InArena(i)) { | |
121 | somethingInArena = true; | |
122 | if (atLeastOneDuke) | |
123 | break outerLoop; | |
124 | } | |
125 | if ([V.QUEEN,V.KING].includes(this.getPiece(i,j))) { | |
126 | atLeastOneDuke = true; | |
127 | if (this.movesCount < 2 || somethingInArena) | |
128 | break outerLoop; | |
129 | } | |
130 | } | |
131 | } | |
132 | } | |
133 | if ( | |
134 | !someUnitRemain || | |
135 | !atLeastOneDuke || | |
136 | (this.movesCount >= 2 && !somethingInArena) | |
137 | ) { | |
138 | return color == "w" ? "0-1" : "1-0"; | |
139 | } | |
140 | return "*"; | |
141 | } | |
b83a675a BA |
142 | |
143 | static get SEARCH_DEPTH() { | |
144 | return 4; | |
145 | } | |
c3a86f01 | 146 | }; |