mirror of
https://github.com/ggerganov/whisper.cpp.git
synced 2025-04-20 09:01:42 +00:00
wchess: basic chess rules
This commit is contained in:
Fraxy V
parent
a44b21bce0
commit
8f2d8eae10
@ -15,3 +15,5 @@ target_include_directories(libwchess
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PUBLIC
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"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>"
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)
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add_executable(test-chessboard test-chessboard.cpp Chessboard.cpp)
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@ -1,5 +1,7 @@
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#include "Chessboard.h"
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#include <vector>
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#include <algorithm>
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#include <cassert>
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static constexpr std::array<const char*, 64> positions = {
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"a1", "b1", "c1", "d1", "e1", "f1", "g1", "h1",
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@ -85,207 +87,197 @@ std::string Chessboard::stringifyBoard() {
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for (int i = 7; i >= 0; --i) {
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for (int j = 0; j < 8; ++j) {
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if (auto p = board[i * 8 + j]; p) result.push_back(p->color == Piece::White ? whiteShort[p->type] : blackShort[p->type]);
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else result.push_back('.');
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else result.push_back((i + j) % 2 ? '.' : '*');
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result.push_back(' ');
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}
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result.push_back('0' + i + 1);
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result.push_back('\n');
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}
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return result;
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}
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std::vector<std::string_view> split(std::string_view str, char del) {
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std::vector<std::string_view> res;
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size_t cur = 0;
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size_t last = 0;
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while (cur != std::string::npos) {
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if (str[last] == ' ') { // trim white
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++last;
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continue;
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}
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cur = str.find(del, last);
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size_t len = cur == std::string::npos ? str.size() - last : cur - last;
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res.emplace_back(str.data() + last, len);
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last = cur + 1;
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}
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return res;
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}
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Chessboard::Piece::Types Chessboard::tokenToType(std::string_view token) {
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auto it = std::find(pieceNames.begin(), pieceNames.end(), token);
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return it != pieceNames.end() ? Piece::Types(it - pieceNames.begin()) : Piece::Taken;
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}
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size_t Chessboard::tokenToPos(std::string_view token) {
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if (token.size() < 2) return positions.size();
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int file = token[0] - 'a';
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int rank = token[1] - '1';
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int pos = rank * 8 + file;
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if (pos < 0 || pos >= int(positions.size())) return positions.size();
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return pos;
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}
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std::string Chessboard::process(const std::string& transcription) {
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auto commands = split(transcription, ',');
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// fixme: lookup depends on grammar
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int count = m_moveCounter;
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std::vector<Move> moves;
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std::string result;
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result.reserve(commands.size() * 6);
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for (auto& command : commands) {
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fprintf(stdout, "%s: Command '%s%.*s%s'\n", __func__, "\033[1m", int(command.size()), command.data(), "\033[0m");
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if (command.empty()) continue;
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auto tokens = split(command, ' ');
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Piece::Types type = Piece::Types::Taken;
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size_t pos = positions.size();
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if (tokens.size() == 1) {
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type = Piece::Types::Pawn;
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pos = tokenToPos(tokens[0]);
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}
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else if (tokens.size() == 3) {
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type = tokenToType(tokens[0]);
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assert(tokens[1] == "to");
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pos = tokenToPos(tokens[2]);
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}
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if (type == Piece::Types::Taken || pos == positions.size()) continue;
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auto& pieces = count % 2 ? blackPieces : whitePieces;
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auto pieceIndex = 0u;
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for (; pieceIndex < pieces.size(); ++pieceIndex) {
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if (pieces[pieceIndex].type == type && validateMove(pieces[pieceIndex], pos)) break;
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}
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Move m = {pieces[pieceIndex].pos, pos};
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if (pieceIndex < pieces.size() && move({m})) {
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result.append(positions[m.first]);
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result.push_back('-');
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result.append(positions[m.second]);
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result.push_back(' ');
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++count;
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}
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}
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if (!result.empty()) result.pop_back();
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m_moveCounter = count;
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fprintf(stdout, "%s: Moves '%s%s%s'\n", __func__, "\033[1m", result.data(), "\033[0m");
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return result;
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}
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std::string Chessboard::processTranscription(const std::string& t) {
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std::vector<std::string> moves;
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size_t cur = 0;
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size_t last = 0;
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while (cur != std::string::npos) {
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cur = t.find(',', last);
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moves.push_back(t.substr(last, cur));
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last = cur + 1;
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}
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// fixme: lookup depends on grammar
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int count = m_moveCounter;
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std::vector<Move> pendingMoves;
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for (auto& move : moves) {
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fprintf(stdout, "%s: Move '%s%s%s'\n", __func__, "\033[1m", move.c_str(), "\033[0m");
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if (move.empty()) continue;
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auto pieceIndex = 0u;
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for (; pieceIndex < pieceNames.size(); ++pieceIndex) {
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if (std::string::npos != move.find(pieceNames[pieceIndex])) break;
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}
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auto posIndex = 0u;
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for (; posIndex < positions.size(); ++posIndex) {
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if (std::string::npos != move.find(positions[posIndex])) break;
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}
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if (pieceIndex >= pieceNames.size() || posIndex >= positions.size()) continue;
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auto& pieces = count % 2 ? blackPieces : whitePieces;
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auto type = Piece::Types(pieceIndex);
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pieceIndex = 0;
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for (; pieceIndex < pieces.size(); ++pieceIndex) {
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if (pieces[pieceIndex].type == type && checkNext(pieces[pieceIndex], posIndex)) break;
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}
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if (pieceIndex < pieces.size()) {
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pendingMoves.emplace_back(pieces[pieceIndex].pos, posIndex);
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}
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++count;
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}
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auto result = stringifyMoves(pendingMoves);
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commitMoves(pendingMoves);
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m_moveCounter = count;
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return result;
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bool Chessboard::validatePawnMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file) {
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int direction = color == Piece::White ? 1 : -1;
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if (from_file == to_file) {
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if (from_rank == to_rank - direction) return board[to_rank * 8 + to_file] == nullptr;
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if (from_rank == to_rank - direction * 2) return board[(to_rank - direction) * 8 + to_file] == nullptr && board[to_rank * 8 + to_file] == nullptr;
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}
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bool Chessboard::checkNext(const Piece& piece, int pos, bool kingCheck) {
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if (piece.type == Piece::Taken) return false;
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if (piece.pos == pos) return false;
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int i = piece.pos / 8;
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int j = piece.pos - i * 8;
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int ii = pos / 8;
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int jj = pos - ii * 8;
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if (piece.type == Piece::Pawn) {
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if (piece.color == Piece::White) {
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int direction = piece.color == Piece::White ? 1 : -1;
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if (j == jj) {
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if (i == ii - direction) return board[pos] == nullptr;
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if (i == ii - direction * 2) return board[(ii - direction) * 8 + jj] == nullptr && board[pos] == nullptr;
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}
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else if (j + 1 == jj || j - 1 == jj) {
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if (i == ii - direction) return board[pos] != nullptr && board[pos]->color != piece.color;
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}
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}
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return false;
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}
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if (piece.type == Piece::Knight) {
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int di = std::abs(i - ii);
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int dj = std::abs(j - jj);
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if ((di == 2 && dj == 1) || (di == 1 && dj == 2)) return board[pos] == nullptr || board[pos]->color != piece.color;
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return false;
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}
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if (piece.type == Piece::Bishop) {
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if (i - j == ii - jj) {
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int direction = i < ii ? 1 : -1;
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i += direction;
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j += direction;
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while (i != ii) {
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if (board[i * 8 + j]) return false;
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i += direction;
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j += direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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if (i + j == ii + jj) {
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int direction = i < ii ? 1 : -1;
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i += direction;
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j -= direction;
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while (i != ii) {
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if (board[i * 8 + j]) return false;
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i += direction;
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j -= direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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return false;
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}
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if (piece.type == Piece::Rook) {
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if (i == ii) {
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int direction = j < jj ? 1 : -1;
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j += direction;
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while (j != jj) {
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if (board[i * 8 + j]) return false;
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j += direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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if (j == jj) {
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int direction = i < ii ? 1 : -1;
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i += direction;
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while (i != ii) {
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if (board[i * 8 + j]) return false;
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i += direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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return false;
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}
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if (piece.type == Piece::Queen) {
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if (i - j == ii - jj) {
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int direction = i < ii ? 1 : -1;
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i += direction;
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j += direction;
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while (i != ii) {
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if (board[i * 8 + j]) return false;
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i += direction;
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j += direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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if (i + j == ii + jj) {
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int direction = i < ii ? 1 : -1;
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i += direction;
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j -= direction;
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while (i != ii) {
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if (board[i * 8 + j]) return false;
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i += direction;
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j -= direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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if (i == ii) {
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int direction = j < jj ? 1 : -1;
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j += direction;
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while (j != jj) {
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if (board[i * 8 + j]) return false;
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j += direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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if (j == jj) {
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int direction = i < ii ? 1 : -1;
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i += direction;
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while (i != ii) {
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if (board[i * 8 + j]) return false;
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i += direction;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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return false;
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}
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if (piece.type == Piece::King) {
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if (std::abs(i - ii) < 2 && std::abs(j - jj) < 2) {
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auto& pieces = piece.color == Piece::White ? whitePieces : blackPieces;
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for (auto& enemyPiece: pieces) {
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if (!kingCheck && piece.type != Piece::Taken && checkNext(enemyPiece, pos, true)) return false;
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}
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return board[pos] == nullptr || board[pos]->color != piece.color;
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}
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}
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return false;
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else if (from_file + 1 == to_file || from_file - 1 == to_file) {
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if (from_rank == to_rank - direction) return board[to_rank * 8 + to_file] != nullptr && board[to_rank * 8 + to_file]->color != color;
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}
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return false;
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}
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bool Chessboard::validateKnightMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file) {
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int dr = std::abs(from_rank - to_rank);
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int df = std::abs(from_file - to_file);
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if ((dr == 2 && df == 1) || (dr == 1 && df == 2)) return board[to_rank * 8 + to_file] == nullptr || board[to_rank * 8 + to_file]->color != color;
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return false;
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}
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std::string Chessboard::stringifyMoves(const std::vector<Move>& pendingMoves) {
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std::string res;
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for (auto& m : pendingMoves) {
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res.append(positions[m.first]);
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res.push_back('-');
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res.append(positions[m.second]);
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res.push_back(' ');
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bool Chessboard::validateBishopMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file) {
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if (from_rank - from_file == to_rank - to_file) {
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int direction = from_rank < to_rank ? 1 : -1;
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from_rank += direction;
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from_file += direction;
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while (from_rank != to_rank) {
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if (board[from_rank * 8 + from_file]) return false;
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from_rank += direction;
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from_file += direction;
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}
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if (!res.empty()) res.pop_back();
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return res;
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return board[to_rank * 8 + to_file] == nullptr || board[to_rank * 8 + to_file]->color != color;
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}
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void Chessboard::commitMoves(std::vector<Move>& pendingMoves) {
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for (auto& m : pendingMoves) {
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if (!board[m.first] || (board[m.second] && board[m.first]->type == board[m.second]->type)) continue;
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if (board[m.second]) board[m.second]->type = Piece::Taken;
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board[m.second] = board[m.first];
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board[m.first] = nullptr;
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if (from_rank + from_file == to_rank + to_file) {
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int direction = from_rank < to_rank ? 1 : -1;
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from_rank += direction;
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from_file -= direction;
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while (from_rank != to_rank) {
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if (board[from_rank * 8 + from_file]) return false;
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from_rank += direction;
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from_file -= direction;
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}
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pendingMoves.clear();
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}
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return board[to_rank * 8 + to_file] == nullptr || board[to_rank * 8 + to_file]->color != color;
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}
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return false;
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}
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bool Chessboard::validateRookMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file) {
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if (from_rank == to_rank) {
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int direction = from_file < to_file ? 1 : -1;
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from_file += direction;
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while (from_file != to_file) {
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if (board[from_rank * 8 + from_file]) return false;
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from_file += direction;
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}
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return board[to_rank * 8 + to_file] == nullptr || board[to_rank * 8 + to_file]->color != color;
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}
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if (from_file == to_file) {
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int direction = from_rank < to_rank ? 1 : -1;
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from_rank += direction;
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while (from_rank != to_rank) {
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if (board[from_rank * 8 + from_file]) return false;
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from_rank += direction;
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}
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return board[to_rank * 8 + to_file] == nullptr || board[to_rank * 8 + to_file]->color != color;
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}
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return false;
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}
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bool Chessboard::validateQueenMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file) {
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if (validateBishopMove(color, from_rank, from_file, to_rank, to_file)) return true;
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return validateRookMove(color, from_rank, from_file, to_rank, to_file);
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}
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bool Chessboard::validateKingMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file) {
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if (std::abs(from_rank - to_rank) < 2 && std::abs(from_file - to_file) < 2) {
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return board[to_rank * 8 + to_file] == nullptr || board[to_rank * 8 + to_file]->color != color;
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}
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return false;
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}
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bool Chessboard::validateMove(const Piece& piece, int pos) {
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if (piece.type == Piece::Taken) return false;
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if (piece.pos == pos) return false;
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int i = piece.pos / 8;
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int j = piece.pos - i * 8;
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int ii = pos / 8;
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int jj = pos - ii * 8;
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switch (piece.type) {
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case Piece::Pawn: return validatePawnMove(piece.color, i, j, ii, jj);
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case Piece::Knight: return validateKnightMove(piece.color, i, j, ii, jj);
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case Piece::Bishop: return validateBishopMove(piece.color, i, j, ii, jj);
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case Piece::Rook: return validateRookMove(piece.color, i, j, ii, jj);
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case Piece::Queen: return validateQueenMove(piece.color, i, j, ii, jj);
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case Piece::King: return validateKingMove(piece.color, i, j, ii, jj);
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default: break;
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}
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return false;
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}
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bool Chessboard::move(const Move& m) {
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if (!board[m.first] || (board[m.second] && board[m.first]->color == board[m.second]->color)) return false;
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if (board[m.second]) board[m.second]->type = Piece::Taken;
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board[m.second] = board[m.first];
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board[m.first] = nullptr;
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board[m.second]->pos = m.second;
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return true;
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}
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@ -6,12 +6,11 @@
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class Chessboard {
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public:
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Chessboard();
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std::string processTranscription(const std::string& t);
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std::string process(const std::string& t);
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std::string stringifyBoard();
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private:
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using Move = std::pair<int, int>;
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std::string stringifyMoves(const std::vector<Move>&);
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void commitMoves(std::vector<Move>&);
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bool move(const Move& move);
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struct Piece {
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enum Types {
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@ -34,14 +33,24 @@ private:
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int pos;
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};
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Piece::Types tokenToType(std::string_view token);
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size_t tokenToPos(std::string_view token);
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using PieceSet = std::array<Piece, 16>;
|
||||
|
||||
PieceSet blackPieces;
|
||||
PieceSet whitePieces;
|
||||
int m_moveCounter;
|
||||
int m_moveCounter = 0;
|
||||
|
||||
using Board = std::array<Piece*, 64>;
|
||||
Board board;
|
||||
|
||||
bool checkNext(const Piece& piece, int pos, bool kingCheck = false);
|
||||
bool validateMove(const Piece& piece, int pos);
|
||||
// just basic validation
|
||||
// fixme: missing en passant, castling, promotion, etc.
|
||||
bool validatePawnMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file);
|
||||
bool validateKnightMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file);
|
||||
bool validateBishopMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file);
|
||||
bool validateRookMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file);
|
||||
bool validateQueenMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file);
|
||||
bool validateKingMove(Piece::Colors color, int from_rank, int from_file, int to_rank, int to_file);
|
||||
};
|
||||
|
||||
@ -190,7 +190,7 @@ void WChess::run() {
|
||||
set_status(txt);
|
||||
}
|
||||
if (!command.empty()) {
|
||||
set_moves(m_board->processTranscription(command));
|
||||
set_moves(m_board->process(command));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
88
examples/wchess/libwchess/test-chessboard.cpp
Normal file
88
examples/wchess/libwchess/test-chessboard.cpp
Normal file
@ -0,0 +1,88 @@
|
||||
#include "Chessboard.h"
|
||||
|
||||
#define ASSERT(x) \
|
||||
do { \
|
||||
if (!(x)) { \
|
||||
fprintf(stderr, "ASSERT: %s:%d: %s\n", __FILE__, __LINE__, #x); \
|
||||
fflush(stderr); \
|
||||
exit(1); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
|
||||
int main() {
|
||||
|
||||
{
|
||||
// pawns
|
||||
Chessboard chess;
|
||||
|
||||
ASSERT(chess.process("pawn to d4, e5, e3, pawn to d5") == "d2-d4 e7-e5 e2-e3 d7-d5");
|
||||
ASSERT(chess.process("pawn to d4") == ""); // wrong
|
||||
ASSERT(chess.process("pawn to c5") == ""); // wrong
|
||||
ASSERT(chess.process("pawn to d5") == ""); // wrong
|
||||
ASSERT(chess.process("pawn to d3") == ""); // wrong
|
||||
ASSERT(chess.process("pawn to f5") == ""); // wrong, white's turn
|
||||
ASSERT(chess.process("h4") == "h2-h4");
|
||||
ASSERT(chess.process("d4") == "e5-d4");
|
||||
ASSERT(chess.process("e4") == "e3-e4");
|
||||
ASSERT(chess.process("d4") == ""); // wrong
|
||||
ASSERT(chess.process("e4") == "d5-e4");
|
||||
}
|
||||
|
||||
{
|
||||
// rook
|
||||
Chessboard chess;
|
||||
|
||||
ASSERT(chess.process("rook to a3") == ""); // wrong
|
||||
ASSERT(chess.process("a4, h5, rook to a3, rook to h6") == "a2-a4 h7-h5 a1-a3 h8-h6");
|
||||
ASSERT(chess.process("rook to d3, rook to e6") == "a3-d3 h6-e6");
|
||||
ASSERT(chess.process("rook to d4, rook to e5") == "d3-d4 e6-e5");
|
||||
ASSERT(chess.process("rook to a4") == ""); // wrong
|
||||
ASSERT(chess.process("rook to d8") == ""); // wrong
|
||||
ASSERT(chess.process("rook to d3") == "d4-d3");
|
||||
ASSERT(chess.process("rook to e2") == "e5-e2");
|
||||
}
|
||||
|
||||
{
|
||||
// knight
|
||||
Chessboard chess;
|
||||
|
||||
ASSERT(chess.process("knight to c3, knight to c6") == "b1-c3 b8-c6");
|
||||
ASSERT(chess.process("knight to c3") == ""); // wrong
|
||||
ASSERT(chess.process("knight to a2") == ""); // wrong
|
||||
ASSERT(chess.process("knight to b4") == ""); // wrong, white's turn
|
||||
ASSERT(chess.process("knight to b5") == "c3-b5");
|
||||
ASSERT(chess.process("knight to a5") == "c6-a5");
|
||||
ASSERT(chess.process("knight to c7") == "b5-c7");
|
||||
}
|
||||
|
||||
{
|
||||
// bishop
|
||||
Chessboard chess;
|
||||
|
||||
ASSERT(chess.process("b3, b6, bishop to b2, bishop to b7") == "b2-b3 b7-b6 c1-b2 c8-b7");
|
||||
ASSERT(chess.process("bishop to a1") == ""); // wrong
|
||||
ASSERT(chess.process("bishop to h8") == ""); // wrong
|
||||
ASSERT(chess.process("bishop to a6") == ""); // wrong, white's turn
|
||||
ASSERT(chess.process("bishop to g7") == "b2-g7");
|
||||
}
|
||||
|
||||
{
|
||||
// queen
|
||||
Chessboard chess;
|
||||
ASSERT(chess.process("queen to d8") == ""); // wrong
|
||||
ASSERT(chess.process("queen to f1") == ""); // wrong
|
||||
ASSERT(chess.process("queen to h5") == ""); // wrong
|
||||
ASSERT(chess.process("e3, d5, queen to h5, queen to d6") == "e2-e3 d7-d5 d1-h5 d8-d6");
|
||||
ASSERT(chess.process("queen to c5") == ""); // wrong, white's turn
|
||||
ASSERT(chess.process("queen to f7") == "h5-f7");
|
||||
}
|
||||
|
||||
{
|
||||
// king
|
||||
Chessboard chess;
|
||||
ASSERT(chess.process("d3, d6, king to d2, king to d7, king to c3, king to c6, king to c4") == "d2-d3 d7-d6 e1-d2 e8-d7 d2-c3 d7-c6 c3-c4");
|
||||
ASSERT(chess.process("bishop to e6") == "c8-e6");
|
||||
ASSERT(chess.process("king to b3") == "c4-b3"); // !! check check not implemented
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user