Advance on Checkered. TODO: fix checks detection by checkered pieces
[xogo.git] / variants / Chakart / class.js
CommitLineData
bc2bc396 1import ChessRules from "/base_rules.js";
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2import {ArrayFun} from "/utils/array.js";
3import {Random} from "/utils/alea.js";
7c038235 4import {FenUtil} from "/utils/setupPieces.js";
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5import PiPo from "/utils/PiPo.js";
6import Move from "/utils/Move.js";
f382c57b 7
bc2bc396 8export default class ChakartRules extends ChessRules {
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9
10 static get Options() {
11 return {
12 select: [
13 {
14 label: "Randomness",
15 variable: "randomness",
16 defaut: 2,
17 options: [
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18 {label: "Deterministic", value: 0},
19 {label: "Symmetric random", value: 1},
20 {label: "Asymmetric random", value: 2}
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21 ]
22 }
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23 ],
24 styles: ["cylinder"]
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25 };
26 }
27
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28 get pawnPromotions() {
29 return ['q', 'r', 'n', 'b', 'k'];
f8b43ef7 30 }
8f57fbf2 31
2b9b90da 32 get hasCastle() {
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33 return false;
34 }
2b9b90da 35 get hasEnpassant() {
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36 return false;
37 }
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38 get hasReserve() {
39 return true;
40 }
41 get hasReserveFen() {
42 return false;
43 }
f8b43ef7 44
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45 static get IMMOBILIZE_CODE() {
46 return {
47 'p': 's',
48 'r': 'u',
49 'n': 'o',
50 'b': 'c',
51 'q': 't',
52 'k': 'l'
53 };
54 }
55
56 static get IMMOBILIZE_DECODE() {
57 return {
58 's': 'p',
59 'u': 'r',
60 'o': 'n',
61 'c': 'b',
62 't': 'q',
63 'l': 'k'
64 };
65 }
66
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67 // Fictive color 'a', bomb banana mushroom egg
68 static get BOMB() {
69 return 'w'; //"Wario"
70 }
71 static get BANANA() {
72 return 'd'; //"Donkey"
73 }
74 static get EGG() {
75 return 'e';
76 }
77 static get MUSHROOM() {
78 return 'm';
79 }
80
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81 static get EGG_SURPRISE() {
82 return [
83 "kingboo", "bowser", "daisy", "koopa",
84 "luigi", "waluigi", "toadette", "chomp"];
85 }
86
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87 canIplay(x, y) {
88 if (
89 this.playerColor != this.turn ||
90 Object.keys(V.IMMOBILIZE_DECODE).includes(this.getPiece(x, y))
91 ) {
92 return false;
93 }
94 return this.egg == "kingboo" || this.getColor(x, y) == this.turn;
95 }
96
24872b22 97 pieces(color, x, y) {
3b641716 98 const specials = {
24872b22 99 'i': {"class": "invisible"}, //queen
cc9fe4f1 100 '?': {"class": "mystery"}, //...initial square
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101 'e': {"class": "egg"},
102 'm': {"class": "mushroom"},
103 'd': {"class": "banana"},
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104 'w': {"class": "bomb"},
105 'z': {"class": "remote-capture"}
24872b22 106 };
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107 const bowsered = {
108 's': {"class": ["immobilized", "pawn"]},
109 'u': {"class": ["immobilized", "rook"]},
110 'o': {"class": ["immobilized", "knight"]},
111 'c': {"class": ["immobilized", "bishop"]},
112 't': {"class": ["immobilized", "queen"]},
113 'l': {"class": ["immobilized", "king"]}
114 };
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115 return Object.assign(
116 {
117 'y': {
118 // Virtual piece for "king remote shell captures"
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119 attack: [
120 {
121 steps: [
122 [0, 1], [0, -1], [1, 0], [-1, 0],
123 [1, 1], [1, -1], [-1, 1], [-1, -1]
124 ]
125 }
126 ]
127 }
128 },
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129 specials, bowsered, super.pieces(color, x, y)
130 );
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131 }
132
f31de5e4 133 genRandInitBaseFen() {
7c038235 134 const s = FenUtil.setupPieces(
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135 ['r', 'n', 'b', 'q', 'k', 'b', 'n', 'r'],
136 {
137 randomness: this.options["randomness"],
138 diffCol: ['b']
139 }
140 );
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141 return {
142 fen: s.b.join("") + "/pppppppp/8/8/8/8/PPPPPPPP/" +
143 s.w.join("").toUpperCase(),
144 o: {flags: "1111"} //Peach + Mario
145 };
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146 }
147
8f57fbf2 148 fen2board(f) {
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149 return (
150 f.charCodeAt() <= 90
151 ? "w" + f.toLowerCase()
152 : (['w', 'd', 'e', 'm'].includes(f) ? "a" : "b") + f
153 );
154 }
155
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156 setFlags(fenflags) {
157 // King can send shell? Queen can be invisible?
158 this.powerFlags = {
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159 w: {k: false, q: false},
160 b: {k: false, q: false}
f8b43ef7 161 };
8f57fbf2 162 for (let c of ['w', 'b']) {
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163 for (let p of ['k', 'q']) {
164 this.powerFlags[c][p] =
165 fenflags.charAt((c == "w" ? 0 : 2) + (p == 'k' ? 0 : 1)) == "1";
166 }
167 }
168 }
169
170 aggregateFlags() {
171 return this.powerFlags;
172 }
173
174 disaggregateFlags(flags) {
175 this.powerFlags = flags;
176 }
177
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178 getFlagsFen() {
179 return ['w', 'b'].map(c => {
180 return ['k', 'q'].map(p => this.powerFlags[c][p] ? "1" : "0").join("");
181 }).join("");
182 }
183
8f57fbf2 184 setOtherVariables(fenParsed) {
5f08c59b 185 super.setOtherVariables(fenParsed);
bc2bc396 186 this.egg = null;
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187 // Change seed (after FEN generation!!)
188 // so that further calls differ between players:
554e3ad3 189 Random.setSeed(Math.floor(19840 * Math.random()));
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190 }
191
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192 initReserves() {
193 this.reserve = {}; //to be filled later
194 }
195
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196 canStepOver(i, j) {
197 return (
198 this.board[i][j] == "" ||
199 ['i', V.EGG, V.MUSHROOM].includes(this.getPiece(i, j))
200 );
201 }
202
c7c2f41c 203 // For Toadette bonus
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204 canDrop([c, p], [i, j]) {
205 return (
206 (
207 this.board[i][j] == "" ||
208 this.getColor(i, j) == 'a' ||
209 this.getPiece(i, j) == 'i'
210 )
211 &&
212 (p != "p" || (c == 'w' && i < this.size.x - 1) || (c == 'b' && i > 0))
213 );
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214 }
215
bc2bc396 216 getPotentialMovesFrom([x, y]) {
f8b43ef7 217 let moves = [];
3b641716 218 const piece = this.getPiece(x, y);
bc2bc396 219 if (this.egg == "toadette")
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220 moves = this.getDropMovesFrom([x, y]);
221 else if (this.egg == "kingboo") {
3b641716 222 const color = this.turn;
616a8d7a 223 const oppCol = C.GetOppTurn(color);
3b641716 224 // Only allow to swap (non-immobilized!) pieces
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225 for (let i=0; i<this.size.x; i++) {
226 for (let j=0; j<this.size.y; j++) {
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227 const colIJ = this.getColor(i, j);
228 const pieceIJ = this.getPiece(i, j);
229 if (
230 (i != x || j != y) &&
231 ['w', 'b'].includes(colIJ) &&
3b641716 232 !Object.keys(V.IMMOBILIZE_DECODE).includes(pieceIJ) &&
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233 // Next conditions = no pawn on last rank
234 (
3b641716 235 piece != 'p' ||
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236 (
237 (color != 'w' || i != 0) &&
238 (color != 'b' || i != this.size.x - 1)
239 )
240 )
241 &&
242 (
243 pieceIJ != 'p' ||
244 (
245 (colIJ != 'w' || x != 0) &&
246 (colIJ != 'b' || x != this.size.x - 1)
247 )
248 )
249 ) {
37481d1e 250 let m = this.getBasicMove([x, y], [i, j]);
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251 m.appear.push(new PiPo({x: x, y: y, p: pieceIJ, c: colIJ}));
252 m.kingboo = true; //avoid some side effects (bananas/bombs)
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253 moves.push(m);
254 }
255 }
256 }
be3cb9d1 257 }
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258 else {
259 // Normal case (including bonus daisy)
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260 switch (piece) {
261 case 'p':
262 moves = this.getPawnMovesFrom([x, y]); //apply promotions
263 break;
264 case 'q':
265 moves = this.getQueenMovesFrom([x, y]);
266 break;
267 case 'k':
268 moves = this.getKingMovesFrom([x, y]);
269 break;
270 case 'n':
271 moves = this.getKnightMovesFrom([x, y]);
272 break;
273 case 'b':
274 case 'r':
3b641716 275 // Explicitely listing types to avoid moving immobilized piece
6b9320bb 276 moves = super.getPotentialMovesOf(piece, [x, y]);
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277 break;
278 }
279 }
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280 return moves;
281 }
282
37481d1e 283 getPawnMovesFrom([x, y]) {
f8b43ef7 284 const color = this.turn;
616a8d7a 285 const oppCol = C.GetOppTurn(color);
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286 const shiftX = (color == 'w' ? -1 : 1);
287 const firstRank = (color == "w" ? this.size.x - 1 : 0);
f8b43ef7 288 let moves = [];
cc9fe4f1 289 const frontPiece = this.getPiece(x + shiftX, y);
f8b43ef7 290 if (
be3cb9d1 291 this.board[x + shiftX][y] == "" ||
f8b43ef7 292 this.getColor(x + shiftX, y) == 'a' ||
cc9fe4f1 293 frontPiece == 'i'
f8b43ef7 294 ) {
7562d2c2 295 moves.push(this.getBasicMove([x, y], [x + shiftX, y]));
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296 if (
297 [firstRank, firstRank + shiftX].includes(x) &&
cc9fe4f1 298 ![V.BANANA, V.BOMB].includes(frontPiece) &&
f8b43ef7 299 (
7562d2c2 300 this.board[x + 2 * shiftX][y] == "" ||
f8b43ef7 301 this.getColor(x + 2 * shiftX, y) == 'a' ||
cc9fe4f1 302 this.getPiece(x + 2 * shiftX, y) == 'i'
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303 )
304 ) {
7562d2c2 305 moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y]));
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306 }
307 }
308 for (let shiftY of [-1, 1]) {
f5435757 309 const nextY = this.getY(y + shiftY);
f8b43ef7 310 if (
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311 nextY >= 0 &&
312 nextY < this.size.y &&
313 this.board[x + shiftX][nextY] != "" &&
f8b43ef7 314 // Pawns cannot capture invisible queen this way!
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315 this.getPiece(x + shiftX, nextY) != 'i' &&
316 ['a', oppCol].includes(this.getColor(x + shiftX, nextY))
f8b43ef7 317 ) {
f5435757 318 moves.push(this.getBasicMove([x, y], [x + shiftX, nextY]));
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319 }
320 }
b9877ed2 321 moves = super.pawnPostProcess(moves, color, oppCol);
f5435757 322 // Add mushroom on before-last square (+ potential segments)
24872b22 323 moves.forEach(m => {
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324 let [mx, my] = [x, y];
325 if (Math.abs(m.end.x - m.start.x) == 2)
326 mx = (m.start.x + m.end.x) / 2;
327 m.appear.push(new PiPo({x: mx, y: my, c: 'a', p: 'm'}));
328 if (mx != x && this.board[mx][my] != "") {
3b641716 329 m.vanish.push(new PiPo({
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330 x: mx,
331 y: my,
332 c: this.getColor(mx, my),
333 p: this.getPiece(mx, my)
3b641716 334 }));
24872b22 335 }
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336 if (Math.abs(m.end.y - m.start.y) > 1) {
337 m.segments = [
338 [[x, y], [x, y]],
339 [[m.end.x, m.end.y], [m.end.x, m.end.y]]
340 ];
341 }
24872b22 342 });
3b641716 343 return moves;
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344 }
345
346 getKnightMovesFrom([x, y]) {
347 // Add egg on initial square:
6b9320bb 348 return super.getPotentialMovesOf('n', [x, y]).map(m => {
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349 m.appear.push(new PiPo({p: "e", c: "a", x: x, y: y}));
350 return m;
351 });
352 }
353
37481d1e 354 getQueenMovesFrom(sq) {
6b9320bb 355 const normalMoves = super.getPotentialMovesOf('q', sq);
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356 // If flag allows it, add 'invisible movements'
357 let invisibleMoves = [];
7562d2c2 358 if (this.powerFlags[this.turn]['q']) {
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359 normalMoves.forEach(m => {
360 if (
361 m.appear.length == 1 &&
362 m.vanish.length == 1 &&
363 // Only simple non-capturing moves:
364 m.vanish[0].c != 'a'
365 ) {
366 let im = JSON.parse(JSON.stringify(m));
cc9fe4f1 367 im.appear[0].p = 'i';
24872b22 368 im.noAnimate = true;
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369 invisibleMoves.push(im);
370 }
371 });
372 }
373 return normalMoves.concat(invisibleMoves);
374 }
375
37481d1e 376 getKingMovesFrom([x, y]) {
6b9320bb 377 let moves = super.getPotentialMovesOf('k', [x, y]);
f8b43ef7 378 // If flag allows it, add 'remote shell captures'
7562d2c2 379 if (this.powerFlags[this.turn]['k']) {
6b9320bb 380 let shellCaptures = super.getPotentialMovesOf('y', [x, y]);
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381 shellCaptures.forEach(sc => {
382 sc.shell = true; //easier play()
383 sc.choice = 'z'; //to display in showChoices()
384 // Fix move (Rifle style):
385 sc.vanish.shift();
386 sc.appear.shift();
f8b43ef7 387 });
f5435757 388 Array.prototype.push.apply(moves, shellCaptures);
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389 }
390 return moves;
391 }
392
7562d2c2 393 play(move) {
a2bb7e06 394 const color = this.turn;
616a8d7a 395 const oppCol = C.GetOppTurn(color);
24872b22 396 this.egg = move.egg;
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397 if (move.egg == "toadette") {
398 this.reserve = { w: {}, b: {} };
399 // Randomly select a piece in pawnPromotions
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400 if (!move.toadette)
401 move.toadette = Random.sample(this.pawnPromotions);
402 this.reserve[color][move.toadette] = 1;
24872b22 403 this.re_drawReserve([color]);
f8b43ef7 404 }
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405 else if (Object.keys(this.reserve).length > 0) {
406 this.reserve = {};
407 this.re_drawReserve([color]);
f8b43ef7 408 }
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409 if (move.shell)
410 this.powerFlags[color]['k'] = false;
cc9fe4f1 411 else if (move.appear.length > 0 && move.appear[0].p == 'i') {
24872b22 412 this.powerFlags[move.appear[0].c]['q'] = false;
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413 if (color == this.playerColor) {
414 move.appear.push(
415 new PiPo({x: move.start.x, y: move.start.y, c: color, p: '?'}));
416 }
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417 }
418 if (color == this.playerColor) {
419 // Look for an immobilized piece of my color: it can now move
420 for (let i=0; i<8; i++) {
421 for (let j=0; j<8; j++) {
422 if ((i != move.end.x || j != move.end.y) && this.board[i][j] != "") {
423 const piece = this.getPiece(i, j);
424 if (
425 this.getColor(i, j) == color &&
426 Object.keys(V.IMMOBILIZE_DECODE).includes(piece)
427 ) {
428 move.vanish.push(new PiPo({
429 x: i, y: j, c: color, p: piece
430 }));
431 move.appear.push(new PiPo({
432 x: i, y: j, c: color, p: V.IMMOBILIZE_DECODE[piece]
433 }));
434 }
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435 }
436 }
437 }
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438 // Also make opponent invisible queen visible again, if any
439 for (let i=0; i<8; i++) {
440 for (let j=0; j<8; j++) {
441 if (
442 this.board[i][j] != "" &&
cc9fe4f1 443 this.getColor(i, j) == oppCol
3b641716 444 ) {
cc9fe4f1 445 const pieceIJ = this.getPiece(i, j);
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BA
446 if (
447 pieceIJ == 'i' &&
448 // Ensure that current move doesn't erase invisible queen
449 move.appear.every(a => a.x != i || a.y != j)
450 ) {
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451 move.vanish.push(new PiPo({x: i, y: j, c: oppCol, p: 'i'}));
452 move.appear.push(new PiPo({x: i, y: j, c: oppCol, p: 'q'}));
453 }
454 else if (pieceIJ == '?')
455 move.vanish.push(new PiPo({x: i, y: j, c: oppCol, p: '?'}));
3b641716 456 }
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457 }
458 }
459 }
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460 this.playOnBoard(move);
461 super.postPlay(move);
462 }
463
464 playVisual(move, r) {
465 super.playVisual(move, r);
bc2bc396 466 if (move.egg)
cc9fe4f1 467 this.displayBonus(move);
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468 }
469
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470 buildMoveStack(move, r) {
471 const color = this.turn;
472 if (
473 move.appear.length > 0 &&
474 move.appear[0].p == 'p' &&
475 (
476 (color == 'w' && move.end.x == 0) ||
477 (color == 'b' && move.end.x == this.size.x - 1)
478 )
479 ) {
480 // "Forgotten" promotion, which occurred after some effect
616a8d7a 481 let moves = super.pawnPostProcess([move], color, C.GetOppTurn(color));
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482 super.showChoices(moves, r);
483 }
484 else
485 super.buildMoveStack(move, r);
486 }
487
5f08c59b 488 computeNextMove(move) {
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489 if (move.koopa)
490 return null;
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491 // Set potential random effects, so that play() is deterministic
492 // from opponent viewpoint:
493 const endPiece = this.getPiece(move.end.x, move.end.y);
494 switch (endPiece) {
495 case V.EGG:
496 move.egg = Random.sample(V.EGG_SURPRISE);
497 move.next = this.getEggEffect(move);
498 break;
499 case V.MUSHROOM:
500 move.next = this.getMushroomEffect(move);
501 break;
502 case V.BANANA:
503 case V.BOMB:
504 move.next = this.getBombBananaEffect(move, endPiece);
505 break;
506 }
507 // NOTE: Chakart has also some side-effects:
508 if (
509 !move.next && move.appear.length > 0 &&
510 !move.kingboo && !move.luigiEffect
511 ) {
512 const movingPiece = move.appear[0].p;
513 if (['b', 'r'].includes(movingPiece)) {
514 // Drop a banana or bomb:
515 const bs =
516 this.getRandomSquare([move.end.x, move.end.y],
517 movingPiece == 'r'
518 ? [[1, 1], [1, -1], [-1, 1], [-1, -1]]
519 : [[1, 0], [-1, 0], [0, 1], [0, -1]],
520 "freeSquare");
521 if (bs) {
522 move.appear.push(
523 new PiPo({
524 x: bs[0],
525 y: bs[1],
526 c: 'a',
527 p: movingPiece == 'r' ? 'd' : 'w'
528 })
529 );
530 if (this.board[bs[0]][bs[1]] != "") {
531 move.vanish.push(
532 new PiPo({
533 x: bs[0],
534 y: bs[1],
535 c: this.getColor(bs[0], bs[1]),
536 p: this.getPiece(bs[0], bs[1])
537 })
538 );
539 }
540 }
541 }
542 }
543 }
544
545 isLastMove(move) {
546 return !move.next && !["daisy", "toadette", "kingboo"].includes(move.egg);
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547 }
548
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549 // Helper to set and apply banana/bomb effect
550 getRandomSquare([x, y], steps, freeSquare) {
551 let validSteps = steps.filter(s => this.onBoard(x + s[0], y + s[1]));
552 if (freeSquare) {
553 // Square to put banana/bomb cannot be occupied by a piece
554 validSteps = validSteps.filter(s => {
555 return ["", 'a'].includes(this.getColor(x + s[0], y + s[1]))
556 });
557 }
558 if (validSteps.length == 0)
559 return null;
560 const step = validSteps[Random.randInt(validSteps.length)];
561 return [x + step[0], y + step[1]];
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562 }
563
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564 getEggEffect(move) {
565 const getRandomPiece = (c) => {
566 let bagOfPieces = [];
567 for (let i=0; i<this.size.x; i++) {
568 for (let j=0; j<this.size.y; j++) {
9ac67217
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569 const pieceIJ = this.getPiece(i, j);
570 if (
571 this.getColor(i, j) == c && pieceIJ != 'k' &&
572 (
573 // The color will change, so pawns on first rank are ineligible
574 pieceIJ != 'p' ||
575 (c == 'w' && i < this.size.x - 1) || (c == 'b' && i > 0)
576 )
577 ) {
3b641716 578 bagOfPieces.push([i, j]);
9ac67217 579 }
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BA
580 }
581 }
582 if (bagOfPieces.length >= 1)
583 return Random.sample(bagOfPieces);
584 return null;
585 };
586 const color = this.turn;
587 let em = null;
588 switch (move.egg) {
589 case "luigi":
590 case "waluigi":
591 // Change color of friendly or enemy piece, king excepted
616a8d7a
BA
592 const oldColor = (move.egg == "waluigi" ? color : C.GetOppTurn(color));
593 const newColor = C.GetOppTurn(oldColor);
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594 const coords = getRandomPiece(oldColor);
595 if (coords) {
596 const piece = this.getPiece(coords[0], coords[1]);
597 em = new Move({
598 appear: [
599 new PiPo({x: coords[0], y: coords[1], c: newColor, p: piece})
600 ],
601 vanish: [
602 new PiPo({x: coords[0], y: coords[1], c: oldColor, p: piece})
603 ]
604 });
5f08c59b 605 em.luigiEffect = true; //avoid dropping bomb/banana by mistake
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606 }
607 break;
608 case "bowser":
609 em = new Move({
610 appear: [
611 new PiPo({
612 x: move.end.x,
613 y: move.end.y,
614 c: color,
615 p: V.IMMOBILIZE_CODE[move.appear[0].p]
616 })
617 ],
618 vanish: [
619 new PiPo({
620 x: move.end.x,
621 y: move.end.y,
622 c: color,
623 p: move.appear[0].p
624 })
625 ]
626 });
627 break;
628 case "koopa":
629 // Reverse move
630 em = new Move({
631 appear: [
632 new PiPo({
633 x: move.start.x, y: move.start.y, c: color, p: move.appear[0].p
634 })
635 ],
636 vanish: [
637 new PiPo({
638 x: move.end.x, y: move.end.y, c: color, p: move.appear[0].p
639 })
640 ]
641 });
642 if (this.board[move.start.x][move.start.y] != "") {
643 // Pawn or knight let something on init square
644 em.vanish.push(new PiPo({
645 x: move.start.x,
646 y: move.start.y,
647 c: 'a',
648 p: this.getPiece(move.start.x, move.start.y)
649 }));
650 }
b9877ed2 651 em.koopa = true; //avoid applying effect
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652 break;
653 case "chomp":
654 // Eat piece
655 em = new Move({
656 appear: [],
657 vanish: [
658 new PiPo({
659 x: move.end.x, y: move.end.y, c: color, p: move.appear[0].p
660 })
661 ],
662 end: {x: move.end.x, y: move.end.y}
663 });
664 break;
665 }
666 if (em && move.egg != "koopa")
667 em.noAnimate = true; //static move
668 return em;
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669 }
670
24872b22 671 getMushroomEffect(move) {
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672 if (
673 typeof move.start.x == "string" || //drop move (toadette)
674 ['b', 'r', 'q'].includes(move.vanish[0].p) //slider
675 ) {
cc9fe4f1 676 return null;
37481d1e 677 }
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678 let step = [move.end.x - move.start.x, move.end.y - move.start.y];
679 if (Math.abs(step[0]) == 2 && Math.abs(step[1]) == 0)
680 // Pawn initial 2-squares move: normalize step
681 step[0] /= 2;
24872b22 682 const nextSquare = [move.end.x + step[0], move.end.y + step[1]];
24872b22 683 let nextMove = null;
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684 if (
685 this.onBoard(nextSquare[0], nextSquare[1]) &&
686 (
687 this.board[nextSquare[0]][nextSquare[1]] == "" ||
688 this.getColor(nextSquare[0], nextSquare[1]) == 'a'
689 )
690 ) {
bc5d61a7 691 this.playOnBoard(move); //HACK for getBasicMove()
24872b22 692 nextMove = this.getBasicMove([move.end.x, move.end.y], nextSquare);
bc5d61a7 693 this.undoOnBoard(move);
24872b22 694 }
24872b22 695 return nextMove;
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696 }
697
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698 getBombBananaEffect(move, item) {
699 const steps = item == V.BANANA
700 ? [[1, 0], [-1, 0], [0, 1], [0, -1]]
701 : [[1, 1], [1, -1], [-1, 1], [-1, -1]];
702 const nextSquare = this.getRandomSquare([move.end.x, move.end.y], steps);
703 this.playOnBoard(move); //HACK for getBasicMove()
704 const res = this.getBasicMove([move.end.x, move.end.y], nextSquare);
705 this.undoOnBoard(move);
706 return res;
707 }
708
cc9fe4f1 709 displayBonus(move) {
98d14451 710 super.displayMessage(null, move.egg, "bonus-text", 2000);
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711 }
712
713 atLeastOneMove() {
714 return true;
715 }
716
717 filterValid(moves) {
718 return moves;
719 }
720
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721 // Kingboo bonus can be animated better:
722 customAnimate(move, segments, cb) {
723 if (!move.kingboo)
724 return 0;
725 super.animateMoving(move.end, move.start, null,
726 segments.reverse().map(s => s.reverse()), cb);
727 return 1;
be3cb9d1 728 }
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729
730};