From: Benjamin Auder Date: Mon, 10 May 2021 18:57:32 +0000 (+0200) Subject: Attempt to fix Eightpieces X-Git-Url: https://git.auder.net/%7B%7B%20asset%28%27mixstore/css/img/doc/html/%7B%7B?a=commitdiff_plain;h=abbda16dbd485dfc43ee502bbef67045b1aecc59;p=vchess.git Attempt to fix Eightpieces --- diff --git a/client/src/variants/Eightpieces.js b/client/src/variants/Eightpieces.js index ded87579..dc7580b3 100644 --- a/client/src/variants/Eightpieces.js +++ b/client/src/variants/Eightpieces.js @@ -1,4 +1,4 @@ -import { randInt } from "@/utils/alea"; +import { randInt, sample } from "@/utils/alea"; import { ChessRules, PiPo, Move } from "@/base_rules"; export class EightpiecesRules extends ChessRules { @@ -178,49 +178,43 @@ export class EightpiecesRules extends ChessRules { // Replace one bishop by sentry, so that sentries on different colors // Also replace one random rook by jailer, // and one random knight by lancer (facing north/south) - - // "replaced" array contains -2 initially, then either -1 if skipped, - // or (eventually) the index of replacement: - let newPos = { 0: "", 7: "" }; - let sentryOddity = -1; - let replaced = {}; - if (options.randomness == 1) replaced = { 'b': -2, 'n': -2, 'r': -2 }; - for (let rank of [0, 7]) { - if (options.randomness == 2) replaced = { 'b': -2, 'n': -2, 'r': -2 }; - for (let i = 0; i < 8; i++) { - const curChar = posParts[rank].charAt(i).toLowerCase(); - if (['b', 'n', 'r'].includes(curChar)) { - if ( - replaced[curChar] == -1 || - (curChar == 'b' && rank == 7 && i % 2 == sentryOddity) || - ( - (curChar != 'b' || rank == 0) && - replaced[curChar] == -2 && - randInt(2) == 0 - ) - ) { - replaced[curChar] = i; - if (curChar == 'b') { - if (sentryOddity < 0) sentryOddity = i % 2; - newPos[rank] += 's'; - } - else if (curChar == 'r') newPos[rank] += 'j'; - else - // Lancer: orientation depends on side - newPos[rank] += (rank == 0 ? 'g' : 'c'); - } - else { - if (replaced[curChar] == -2) replaced[curChar]++; - newPos[rank] += curChar; - } - } - else newPos[rank] += curChar; + let pieceLine = { b: posParts[0], w: posParts[7].toLowerCase() }; + let posBlack = { r: -1, n: -1, b: -1 }; + const mapP = { r: 'j', n: 'l', b: 's' }; + ['w', 'b'].forEach(c => { + ['r', 'n', 'b'].forEach(p => { + let pl = pieceLine[c]; + let pos = -1; + if (options.randomness == 2 || c == 'b') + pos = (randInt(2) == 0 ? pl.indexOf(p) : pl.lastIndexOf(p)); + else pos = posBlack[p]; + pieceLine[c] = + pieceLine[c].substr(0, pos) + mapP[p] + pieceLine[c].substr(pos+1); + if (options.randomness == 1 && c == 'b') posBlack[p] = pos; + }); + }); + // Rename 'l' into 'g' (black) or 'c' (white) + pieceLine['w'] = pieceLine['w'].replace('l', 'c'); + pieceLine['b'] = pieceLine['b'].replace('l', 'g'); + if (options.randomness == 2) { + const ws = pieceLine['w'].indexOf('s'); + const bs = pieceLine['b'].indexOf('s'); + if (ws % 2 != bs % 2) { + // Fix sentry: should be on different colors. + // => move sentry on other bishop for random color + const c = sample(['w', 'b'], 1); + pieceLine[c] = pieceLine[c] + .replace('b', 't'); //tmp + .replace('s', 'b'); + .replace('t', 's'); } } return ( - newPos[0] + "/" + posParts.slice(1, 7).join('/') + "/" + - newPos[7].toUpperCase() + " " + fenParts.slice(1, 5).join(' ') + " -" + pieceLine['b'] + "/" + + posParts.slice(1, 7).join('/') + "/" + + pieceLine['w'].toUpperCase() + " " + + fenParts.slice(1, 5).join(' ') + " -" ); }