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78d64531 BA |
1 | import { ChessRules, PiPo, Move } from "@/base_rules"; |
2 | import { ArrayFun } from "@/utils/array"; | |
3 | ||
32f6285e BA |
4 | export class RecycleRules extends ChessRules { |
5 | static get PawnSpecs() { | |
6 | return Object.assign( | |
7 | {}, | |
8 | ChessRules.PawnSpecs, | |
9 | { promotions: [V.PAWN] } //in fact, none | |
10 | ); | |
11 | } | |
12 | ||
78d64531 BA |
13 | static IsGoodFen(fen) { |
14 | if (!ChessRules.IsGoodFen(fen)) return false; | |
15 | const fenParsed = V.ParseFen(fen); | |
16 | // 5) Check reserves | |
17 | if (!fenParsed.reserve || !fenParsed.reserve.match(/^[0-9]{10,10}$/)) | |
18 | return false; | |
19 | return true; | |
20 | } | |
21 | ||
22 | static ParseFen(fen) { | |
23 | const fenParts = fen.split(" "); | |
6f2f9437 BA |
24 | return Object.assign( |
25 | ChessRules.ParseFen(fen), | |
26 | { reserve: fenParts[5] } | |
27 | ); | |
78d64531 BA |
28 | } |
29 | ||
e727fe31 | 30 | getEpSquare(moveOrSquare) { |
bbf66837 | 31 | if (typeof moveOrSquare !== "object" || moveOrSquare.vanish.length > 0) |
e727fe31 BA |
32 | return super.getEpSquare(moveOrSquare); |
33 | // Landing move: no en-passant | |
34 | return undefined; | |
35 | } | |
36 | ||
7ba4a5bc BA |
37 | static GenRandInitFen(randomness) { |
38 | return ChessRules.GenRandInitFen(randomness) + " 0000000000"; | |
78d64531 BA |
39 | } |
40 | ||
41 | getFen() { | |
90e814b6 | 42 | return super.getFen() + " " + this.getReserveFen(); |
78d64531 BA |
43 | } |
44 | ||
f9c36b2d | 45 | getFenForRepeat() { |
90e814b6 | 46 | return super.getFenForRepeat() + "_" + this.getReserveFen(); |
f9c36b2d BA |
47 | } |
48 | ||
78d64531 BA |
49 | getReserveFen() { |
50 | let counts = new Array(10); | |
51 | for ( | |
52 | let i = 0; | |
53 | i < V.PIECES.length - 1; | |
54 | i++ //-1: no king reserve | |
55 | ) { | |
56 | counts[i] = this.reserve["w"][V.PIECES[i]]; | |
57 | counts[5 + i] = this.reserve["b"][V.PIECES[i]]; | |
58 | } | |
59 | return counts.join(""); | |
60 | } | |
61 | ||
62 | setOtherVariables(fen) { | |
63 | super.setOtherVariables(fen); | |
64 | const fenParsed = V.ParseFen(fen); | |
65 | // Also init reserves (used by the interface to show landable pieces) | |
66 | this.reserve = { | |
67 | w: { | |
68 | [V.PAWN]: parseInt(fenParsed.reserve[0]), | |
69 | [V.ROOK]: parseInt(fenParsed.reserve[1]), | |
70 | [V.KNIGHT]: parseInt(fenParsed.reserve[2]), | |
71 | [V.BISHOP]: parseInt(fenParsed.reserve[3]), | |
72 | [V.QUEEN]: parseInt(fenParsed.reserve[4]) | |
73 | }, | |
74 | b: { | |
75 | [V.PAWN]: parseInt(fenParsed.reserve[5]), | |
76 | [V.ROOK]: parseInt(fenParsed.reserve[6]), | |
77 | [V.KNIGHT]: parseInt(fenParsed.reserve[7]), | |
78 | [V.BISHOP]: parseInt(fenParsed.reserve[8]), | |
79 | [V.QUEEN]: parseInt(fenParsed.reserve[9]) | |
80 | } | |
81 | }; | |
82 | } | |
83 | ||
84 | getColor(i, j) { | |
85 | if (i >= V.size.x) return i == V.size.x ? "w" : "b"; | |
86 | return this.board[i][j].charAt(0); | |
87 | } | |
88 | ||
89 | getPiece(i, j) { | |
90 | if (i >= V.size.x) return V.RESERVE_PIECES[j]; | |
91 | return this.board[i][j].charAt(1); | |
92 | } | |
93 | ||
94 | // Used by the interface: | |
241bf8f2 | 95 | getReservePpath(index, color) { |
78d64531 BA |
96 | return color + V.RESERVE_PIECES[index]; |
97 | } | |
98 | ||
99 | // Ordering on reserve pieces | |
100 | static get RESERVE_PIECES() { | |
101 | return [V.PAWN, V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN]; | |
102 | } | |
103 | ||
104 | getReserveMoves([x, y]) { | |
105 | const color = this.turn; | |
106 | const p = V.RESERVE_PIECES[y]; | |
107 | if (this.reserve[color][p] == 0) return []; | |
108 | let moves = []; | |
109 | const pawnShift = p == V.PAWN ? 1 : 0; | |
110 | for (let i = pawnShift; i < V.size.x - pawnShift; i++) { | |
111 | for (let j = 0; j < V.size.y; j++) { | |
112 | if (this.board[i][j] == V.EMPTY) { | |
113 | let mv = new Move({ | |
114 | appear: [ | |
115 | new PiPo({ | |
116 | x: i, | |
117 | y: j, | |
118 | c: color, | |
119 | p: p | |
120 | }) | |
121 | ], | |
122 | vanish: [], | |
123 | start: { x: x, y: y }, //a bit artificial... | |
124 | end: { x: i, y: j } | |
125 | }); | |
126 | moves.push(mv); | |
127 | } | |
128 | } | |
129 | } | |
130 | return moves; | |
131 | } | |
132 | ||
133 | getPotentialMovesFrom([x, y]) { | |
134 | if (x >= V.size.x) { | |
135 | // Reserves, outside of board: x == sizeX(+1) | |
136 | return this.getReserveMoves([x, y]); | |
137 | } | |
138 | // Standard moves | |
139 | return super.getPotentialMovesFrom([x, y]); | |
140 | } | |
141 | ||
142 | getPotentialPawnMoves([x, y]) { | |
32f6285e BA |
143 | let moves = super.getPotentialPawnMoves([x, y]); |
144 | // Remove pawns on 8th rank ("fallen"): | |
78d64531 | 145 | const color = this.turn; |
32f6285e BA |
146 | const lastRank = (color == "w" ? 0 : V.size.x - 1); |
147 | moves.forEach(m => { | |
148 | if (m.appear[0].x == lastRank) m.appear.pop(); | |
149 | }); | |
78d64531 BA |
150 | return moves; |
151 | } | |
152 | ||
153 | getAllValidMoves() { | |
154 | let moves = super.getAllValidMoves(); | |
155 | const color = this.turn; | |
156 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) | |
157 | moves = moves.concat( | |
158 | this.getReserveMoves([V.size.x + (color == "w" ? 0 : 1), i]) | |
159 | ); | |
160 | return this.filterValid(moves); | |
161 | } | |
162 | ||
163 | atLeastOneMove() { | |
164 | if (!super.atLeastOneMove()) { | |
165 | // Search one reserve move | |
166 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) { | |
167 | let moves = this.filterValid( | |
168 | this.getReserveMoves([V.size.x + (this.turn == "w" ? 0 : 1), i]) | |
169 | ); | |
170 | if (moves.length > 0) return true; | |
171 | } | |
172 | return false; | |
173 | } | |
174 | return true; | |
175 | } | |
176 | ||
177 | canTake([x1, y1], [x2, y2]) { | |
178 | // Self-captures allowed, except for the king: | |
179 | return this.getPiece(x2, y2) != V.KING; | |
180 | } | |
181 | ||
32f6285e BA |
182 | prePlay(move) { |
183 | super.prePlay(move); | |
78d64531 | 184 | if (move.vanish.length == 2 && move.appear.length == 2) return; //skip castle |
32f6285e | 185 | const color = this.turn; |
3a2a7b5f BA |
186 | if (move.vanish.length == 0) this.reserve[color][move.appear[0].p]--; |
187 | else if (move.vanish.length == 2 && move.vanish[1].c == color) | |
78d64531 BA |
188 | // Self-capture |
189 | this.reserve[color][move.vanish[1].p]++; | |
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190 | } |
191 | ||
3a2a7b5f BA |
192 | postUndo(move) { |
193 | super.postUndo(move); | |
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194 | if (move.vanish.length == 2 && move.appear.length == 2) return; |
195 | const color = this.turn; | |
3a2a7b5f BA |
196 | if (move.vanish.length == 0) this.reserve[color][move.appear[0].p]++; |
197 | else if (move.vanish.length == 2 && move.vanish[1].c == color) | |
78d64531 | 198 | this.reserve[color][move.vanish[1].p]--; |
78d64531 BA |
199 | } |
200 | ||
201 | static get SEARCH_DEPTH() { | |
202 | return 2; | |
203 | } | |
204 | ||
205 | evalPosition() { | |
206 | let evaluation = super.evalPosition(); | |
207 | // Add reserves: | |
208 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) { | |
209 | const p = V.RESERVE_PIECES[i]; | |
210 | evaluation += this.reserve["w"][p] * V.VALUES[p]; | |
211 | evaluation -= this.reserve["b"][p] * V.VALUES[p]; | |
212 | } | |
213 | return evaluation; | |
214 | } | |
215 | ||
216 | getNotation(move) { | |
217 | const finalSquare = V.CoordsToSquare(move.end); | |
218 | if (move.vanish.length > 0) { | |
219 | if (move.appear.length > 0) { | |
220 | // Standard move | |
221 | return super.getNotation(move); | |
222 | } else { | |
223 | // Pawn fallen: capturing or not | |
224 | let res = ""; | |
225 | if (move.vanish.length == 2) | |
226 | res += V.CoordToColumn(move.start.y) + "x"; | |
227 | return res + finalSquare; | |
228 | } | |
229 | } | |
230 | // Rebirth: | |
231 | const piece = | |
232 | move.appear[0].p != V.PAWN ? move.appear[0].p.toUpperCase() : ""; | |
233 | return piece + "@" + V.CoordsToSquare(move.end); | |
234 | } | |
235 | }; |