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b406466b | 1 | import { ChessRules, Move, PiPo } from "@/base_rules"; |
0e001022 | 2 | import { randInt } from "@/utils/alea"; |
b406466b BA |
3 | |
4 | export class SittuyinRules extends ChessRules { | |
7e8a7ea1 | 5 | |
4313762d BA |
6 | static get Options() { |
7 | return null; | |
8 | } | |
9 | ||
b406466b BA |
10 | static get HasFlags() { |
11 | return false; | |
12 | } | |
13 | ||
14 | static get HasEnpassant() { | |
15 | return false; | |
16 | } | |
17 | ||
107dc1bd BA |
18 | static get Monochrome() { |
19 | return true; | |
20 | } | |
21 | ||
ffeaef85 BA |
22 | static get Notoodark() { |
23 | return true; | |
24 | } | |
25 | ||
107dc1bd BA |
26 | static get Lines() { |
27 | return ChessRules.Lines.concat([ | |
28 | [[0, 0], [8, 8]], | |
29 | [[0, 8], [8, 0]] | |
30 | ]); | |
31 | } | |
32 | ||
b406466b BA |
33 | static get PawnSpecs() { |
34 | return Object.assign( | |
35 | {}, | |
36 | ChessRules.PawnSpecs, | |
37 | { | |
b406466b BA |
38 | // Promotions are handled differently here |
39 | promotions: [V.QUEEN] | |
40 | } | |
41 | ); | |
42 | } | |
43 | ||
44 | static GenRandInitFen() { | |
45 | return "8/8/4pppp/pppp4/4PPPP/PPPP4/8/8 w 0"; | |
46 | } | |
47 | ||
48 | re_setReserve(subTurn) { | |
49 | const mc = this.movesCount; | |
50 | const wc = (mc == 0 ? 1 : 0); | |
51 | const bc = (mc <= 1 ? 1 : 0); | |
52 | this.reserve = { | |
53 | w: { | |
54 | [V.ROOK]: wc * 2, | |
55 | [V.KNIGHT]: wc * 2, | |
56 | [V.BISHOP]: wc * 2, | |
57 | [V.QUEEN]: wc, | |
58 | [V.KING]: wc | |
59 | }, | |
60 | b: { | |
61 | [V.ROOK]: bc * 2, | |
62 | [V.KNIGHT]: bc * 2, | |
63 | [V.BISHOP]: bc * 2, | |
64 | [V.QUEEN]: bc, | |
65 | [V.KING]: bc | |
66 | } | |
67 | } | |
68 | this.subTurn = subTurn || 1; | |
69 | } | |
70 | ||
71 | setOtherVariables(fen) { | |
72 | super.setOtherVariables(fen); | |
73 | if (this.movesCount <= 1) this.re_setReserve(); | |
74 | } | |
75 | ||
76 | getPpath(b) { | |
77 | return "Sittuyin/" + b; | |
78 | } | |
79 | ||
80 | getColor(i, j) { | |
81 | if (i >= V.size.x) return i == V.size.x ? "w" : "b"; | |
82 | return this.board[i][j].charAt(0); | |
83 | } | |
84 | ||
85 | getPiece(i, j) { | |
86 | if (i >= V.size.x) return V.RESERVE_PIECES[j]; | |
87 | return this.board[i][j].charAt(1); | |
88 | } | |
89 | ||
90 | getReservePpath(index, color) { | |
91 | return "Sittuyin/" + color + V.RESERVE_PIECES[index]; | |
92 | } | |
93 | ||
94 | static get RESERVE_PIECES() { | |
95 | return [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN, V.KING]; | |
96 | } | |
97 | ||
98 | getPotentialMovesFrom([x, y]) { | |
0e001022 BA |
99 | if (this.movesCount >= 2) return super.getPotentialMovesFrom([x, y]); |
100 | // Only reserve moves are allowed for now: | |
101 | if (V.OnBoard(x, y)) return []; | |
102 | const color = this.turn; | |
103 | const p = V.RESERVE_PIECES[y]; | |
104 | if (this.reserve[color][p] == 0) return []; | |
105 | const iBound = | |
106 | p != V.ROOK | |
107 | ? (color == 'w' ? [4, 7] : [0, 3]) | |
108 | : (color == 'w' ? [7, 7] : [0, 0]); | |
109 | const jBound = (i) => { | |
110 | if (color == 'w' && i == 4) return [4, 7]; | |
111 | if (color == 'b' && i == 3) return [0, 3]; | |
112 | return [0, 7]; | |
113 | }; | |
114 | let moves = []; | |
115 | for (let i = iBound[0]; i <= iBound[1]; i++) { | |
116 | const jb = jBound(i); | |
117 | for (let j = jb[0]; j <= jb[1]; j++) { | |
118 | if (this.board[i][j] == V.EMPTY) { | |
119 | let mv = new Move({ | |
120 | appear: [ | |
121 | new PiPo({ | |
122 | x: i, | |
123 | y: j, | |
124 | c: color, | |
125 | p: p | |
126 | }) | |
127 | ], | |
128 | vanish: [], | |
129 | start: { x: x, y: y }, | |
130 | end: { x: i, y: j } | |
131 | }); | |
132 | moves.push(mv); | |
b406466b BA |
133 | } |
134 | } | |
b406466b | 135 | } |
0e001022 | 136 | return moves; |
b406466b BA |
137 | } |
138 | ||
139 | getPotentialPawnMoves([x, y]) { | |
140 | const color = this.turn; | |
b406466b BA |
141 | const shiftX = V.PawnSpecs.directions[color]; |
142 | let moves = []; | |
cd49e617 BA |
143 | if (x + shiftX >= 0 && x + shiftX < 8) { |
144 | if (this.board[x + shiftX][y] == V.EMPTY) | |
b406466b BA |
145 | // One square forward |
146 | moves.push(this.getBasicMove([x, y], [x + shiftX, y])); | |
b406466b | 147 | // Captures |
cd49e617 BA |
148 | for (let shiftY of [-1, 1]) { |
149 | if ( | |
150 | y + shiftY >= 0 && y + shiftY < 8 && | |
151 | this.board[x + shiftX][y + shiftY] != V.EMPTY && | |
152 | this.canTake([x, y], [x + shiftX, y + shiftY]) | |
153 | ) { | |
154 | moves.push(this.getBasicMove([x, y], [x + shiftX, y + shiftY])); | |
b406466b BA |
155 | } |
156 | } | |
157 | } | |
158 | let queenOnBoard = false; | |
159 | let pawnsCount = 0; | |
160 | outerLoop: for (let i=0; i<8; i++) { | |
161 | for (let j=0; j<8; j++) { | |
162 | if (this.board[i][j] != V.EMPTY && this.getColor(i, j) == color) { | |
163 | const p = this.getPiece(i, j); | |
164 | if (p == V.QUEEN) { | |
165 | queenOnBoard = true; | |
166 | break outerLoop; | |
167 | } | |
168 | else if (p == V.PAWN && pawnsCount <= 1) pawnsCount++; | |
169 | } | |
170 | } | |
171 | } | |
172 | if ( | |
173 | !queenOnBoard && | |
174 | ( | |
175 | pawnsCount == 1 || | |
176 | (color == 'w' && ((y <= 3 && x == y) || (y >= 4 && x == 7 - y))) || | |
177 | (color == 'b' && ((y >= 4 && x == y) || (y <= 3 && x == 7 - y))) | |
178 | ) | |
179 | ) { | |
b406466b | 180 | const addPromotion = ([xx, yy], moveTo) => { |
e28faedd BA |
181 | // The promoted pawn shouldn't attack anything, |
182 | // and the promotion shouldn't discover a rook attack on anything. | |
183 | const finalSquare = (!moveTo ? [x, y] : [xx, yy]); | |
184 | let validP = true; | |
185 | for (let step of V.steps[V.BISHOP]) { | |
186 | const [i, j] = [finalSquare[0] + step[0], finalSquare[1] + step[1]]; | |
187 | if ( | |
188 | V.OnBoard(i, j) && | |
189 | this.board[i][j] != V.EMPTY && | |
190 | this.getColor(i, j) != color | |
191 | ) { | |
192 | validP = false; | |
193 | break; | |
194 | } | |
195 | } | |
196 | if (validP && !!moveTo) { | |
0e001022 | 197 | // Also check rook discovered attacks on the enemy king |
e28faedd BA |
198 | let found = { |
199 | "0,-1": 0, | |
200 | "0,1": 0, | |
201 | "1,0": 0, | |
202 | "-1,0": 0 | |
203 | }; | |
204 | // TODO: check opposite steps one after another, which could | |
205 | // save some time (no need to explore the other line). | |
206 | for (let step of V.steps[V.ROOK]) { | |
207 | let [i, j] = [x + step[0], y + step[1]]; | |
208 | while (V.OnBoard(i, j) && this.board[i][j] == V.EMPTY) { | |
209 | i += step[0]; | |
210 | j += step[1]; | |
211 | } | |
212 | if (V.OnBoard(i, j)) { | |
0e001022 BA |
213 | const colIJ = this.getColor(i, j); |
214 | const pieceIJ = this.getPiece(i, j); | |
215 | if (colIJ != color && pieceIJ == V.KING) | |
216 | found[step[0] + "," + step[1]] = -1; | |
217 | else if (colIJ == color && pieceIJ == V.ROOK) | |
218 | found[step[0] + "," + step[1]] = 1; | |
e28faedd BA |
219 | } |
220 | } | |
221 | if ( | |
222 | (found["0,-1"] * found["0,1"] < 0) || | |
223 | (found["-1,0"] * found["1,0"] < 0) | |
224 | ) { | |
225 | validP = false; | |
226 | } | |
227 | } | |
228 | if (validP) { | |
229 | moves.push( | |
230 | new Move({ | |
231 | appear: [ | |
232 | new PiPo({ | |
233 | x: !!moveTo ? xx : x, | |
234 | y: yy, //yy == y if !!moveTo | |
235 | c: color, | |
236 | p: V.QUEEN | |
237 | }) | |
238 | ], | |
239 | vanish: [ | |
240 | new PiPo({ | |
241 | x: x, | |
242 | y: y, | |
243 | c: color, | |
244 | p: V.PAWN | |
245 | }) | |
246 | ], | |
247 | start: { x: x, y: y }, | |
248 | end: { x: xx, y: yy } | |
249 | }) | |
250 | ); | |
251 | } | |
b406466b BA |
252 | }; |
253 | // In-place promotion always possible: | |
254 | addPromotion([x - shiftX, y]); | |
255 | for (let step of V.steps[V.BISHOP]) { | |
256 | const [i, j] = [x + step[0], y + step[1]]; | |
8a44494d | 257 | if (V.OnBoard(i, j) && this.board[i][j] == V.EMPTY) |
b406466b BA |
258 | addPromotion([i, j], "moveTo"); |
259 | } | |
260 | } | |
261 | return moves; | |
262 | } | |
263 | ||
264 | getPotentialBishopMoves(sq) { | |
265 | const forward = (this.turn == 'w' ? -1 : 1); | |
266 | return this.getSlideNJumpMoves( | |
4313762d | 267 | sq, V.steps[V.BISHOP].concat([ [forward, 0] ]), 1); |
b406466b BA |
268 | } |
269 | ||
270 | getPotentialQueenMoves(sq) { | |
4313762d | 271 | return this.getSlideNJumpMoves(sq, V.steps[V.BISHOP], 1); |
b406466b BA |
272 | } |
273 | ||
0e001022 BA |
274 | getAllValidMoves() { |
275 | if (this.movesCount >= 2) return super.getAllValidMoves(); | |
276 | const color = this.turn; | |
277 | let moves = []; | |
278 | for (let i = 0; i < V.RESERVE_PIECES.length; i++) { | |
279 | moves = moves.concat( | |
280 | this.getPotentialMovesFrom([V.size.x + (color == "w" ? 0 : 1), i]) | |
281 | ); | |
282 | } | |
283 | return this.filterValid(moves); | |
284 | } | |
285 | ||
b406466b BA |
286 | isAttackedByBishop(sq, color) { |
287 | const forward = (this.turn == 'w' ? 1 : -1); | |
288 | return this.isAttackedBySlideNJump( | |
4313762d | 289 | sq, color, V.BISHOP, V.steps[V.BISHOP].concat([ [forward, 0] ]), 1); |
b406466b BA |
290 | } |
291 | ||
292 | isAttackedByQueen(sq, color) { | |
293 | return this.isAttackedBySlideNJump( | |
4313762d | 294 | sq, color, V.QUEEN, V.steps[V.BISHOP], 1); |
b406466b BA |
295 | } |
296 | ||
297 | underCheck(color) { | |
298 | if (this.movesCount <= 1) return false; | |
299 | return super.underCheck(color); | |
300 | } | |
301 | ||
302 | play(move) { | |
303 | const color = move.appear[0].c; | |
304 | if (this.movesCount <= 1) { | |
305 | V.PlayOnBoard(this.board, move); | |
306 | const piece = move.appear[0].p; | |
307 | this.reserve[color][piece]--; | |
308 | if (piece == V.KING) this.kingPos[color] = [move.end.x, move.end.y]; | |
309 | if (this.subTurn == 8) { | |
310 | // All placement moves are done | |
311 | this.movesCount++; | |
312 | this.turn = V.GetOppCol(color); | |
313 | if (this.movesCount == 1) this.subTurn = 1; | |
314 | else { | |
315 | // Initial placement is over | |
316 | delete this["reserve"]; | |
317 | delete this["subTurn"]; | |
318 | } | |
319 | } | |
320 | else this.subTurn++; | |
321 | } | |
322 | else super.play(move); | |
323 | } | |
324 | ||
325 | undo(move) { | |
326 | const color = move.appear[0].c; | |
327 | if (this.movesCount <= 2) { | |
328 | V.UndoOnBoard(this.board, move); | |
329 | const piece = move.appear[0].p; | |
330 | if (piece == V.KING) this.kingPos[color] = [-1, -1]; | |
331 | if (!this.subTurn || this.subTurn == 1) { | |
332 | // All placement moves are undone (if any) | |
333 | if (!this.subTurn) this.re_setReserve(8); | |
334 | else this.subTurn = 8; | |
335 | this.movesCount--; | |
336 | this.turn = color; | |
337 | } | |
338 | else this.subTurn--; | |
339 | this.reserve[color][piece]++; | |
340 | } | |
341 | else super.undo(move); | |
342 | } | |
343 | ||
344 | getCheckSquares() { | |
345 | if (this.movesCount <= 1) return []; | |
346 | return super.getCheckSquares(); | |
347 | } | |
348 | ||
349 | getCurrentScore() { | |
350 | if (this.movesCount <= 1) return "*"; | |
351 | return super.getCurrentScore(); | |
352 | } | |
353 | ||
354 | static get VALUES() { | |
355 | return { | |
356 | p: 1, | |
357 | r: 5, | |
358 | n: 3, | |
359 | b: 3, | |
360 | q: 2, | |
361 | k: 1000 | |
362 | }; | |
363 | } | |
364 | ||
0e001022 BA |
365 | getComputerMove() { |
366 | if (this.movesCount >= 2) return super.getComputerMove(); | |
367 | // Play a random "initialization move" | |
368 | let res = []; | |
369 | for (let i=0; i<8; i++) { | |
370 | const moves = this.getAllValidMoves(); | |
371 | const moveIdx = randInt(moves.length); | |
372 | this.play(moves[moveIdx]); | |
373 | res.push(moves[moveIdx]); | |
374 | } | |
375 | for (let i=7; i>=0; i--) this.undo(res[i]); | |
376 | return res; | |
377 | } | |
378 | ||
b406466b BA |
379 | getNotation(move) { |
380 | // Do not note placement moves (complete move would be too long) | |
381 | if (move.vanish.length == 0) return ""; | |
fcffb2da BA |
382 | if (move.appear[0].p != move.vanish[0].p) { |
383 | // Pawn promotion: indicate correct final square | |
384 | const initSquare = | |
385 | V.CoordsToSquare({ x: move.vanish[0].x, y: move.vanish[0].y }) | |
386 | const destSquare = | |
6813103a | 387 | V.CoordsToSquare({ x: move.appear[0].x, y: move.appear[0].y }) |
fcffb2da BA |
388 | const prefix = (initSquare != destSquare ? initSquare : ""); |
389 | return prefix + destSquare + "=Q"; | |
390 | } | |
b406466b BA |
391 | return super.getNotation(move); |
392 | } | |
7e8a7ea1 | 393 | |
b406466b | 394 | }; |