| 1 | class UpsidedownRules extends ChessRules |
| 2 | { |
| 3 | static HasFlags() { return false; } |
| 4 | |
| 5 | // Forbid two knights moves in a row at moves 1 and 2 |
| 6 | getPotentialKnightMoves(sq) |
| 7 | { |
| 8 | // But this will also affect FEN for problems, and... |
| 9 | // does it really solve the problem ? |
| 10 | //if (this.moves. ...) |
| 11 | } |
| 12 | |
| 13 | getPotentialKingMoves(sq) |
| 14 | { |
| 15 | // No castle |
| 16 | return this.getSlideNJumpMoves(sq, |
| 17 | V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep"); |
| 18 | } |
| 19 | |
| 20 | static GenRandInitFen() |
| 21 | { |
| 22 | let pieces = { "w": new Array(8), "b": new Array(8) }; |
| 23 | for (let c of ["w","b"]) |
| 24 | { |
| 25 | let positions = _.range(8); |
| 26 | |
| 27 | let randIndex = 2 * _.random(3); |
| 28 | let bishop1Pos = positions[randIndex]; |
| 29 | let randIndex_tmp = 2 * _.random(3) + 1; |
| 30 | let bishop2Pos = positions[randIndex_tmp]; |
| 31 | positions.splice(Math.max(randIndex,randIndex_tmp), 1); |
| 32 | positions.splice(Math.min(randIndex,randIndex_tmp), 1); |
| 33 | |
| 34 | randIndex = _.random(5); |
| 35 | let knight1Pos = positions[randIndex]; |
| 36 | positions.splice(randIndex, 1); |
| 37 | randIndex = _.random(4); |
| 38 | let knight2Pos = positions[randIndex]; |
| 39 | positions.splice(randIndex, 1); |
| 40 | |
| 41 | randIndex = _.random(3); |
| 42 | let queenPos = positions[randIndex]; |
| 43 | positions.splice(randIndex, 1); |
| 44 | |
| 45 | let rook1Pos = positions[0]; |
| 46 | let kingPos = positions[1]; |
| 47 | let rook2Pos = positions[2]; |
| 48 | |
| 49 | pieces[c][rook1Pos] = 'r'; |
| 50 | pieces[c][knight1Pos] = 'n'; |
| 51 | pieces[c][bishop1Pos] = 'b'; |
| 52 | pieces[c][queenPos] = 'q'; |
| 53 | pieces[c][kingPos] = 'k'; |
| 54 | pieces[c][bishop2Pos] = 'b'; |
| 55 | pieces[c][knight2Pos] = 'n'; |
| 56 | pieces[c][rook2Pos] = 'r'; |
| 57 | } |
| 58 | return pieces["w"].join("").toUpperCase() + |
| 59 | "/PPPPPPPP/8/8/8/8/pppppppp/" + |
| 60 | pieces["b"].join("") + |
| 61 | " w 1111 -"; //add turn + flags + enpassant |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | const VariantRules = UpsidedownRules; |