Chess::Move ChessGame::bookMove(Chess::Side side)
{
Q_ASSERT(!side.isNull());
if (m_book[side] == nullptr
|| m_moves.size() >= m_bookDepth[side] * 2)
return Chess::Move();
Chess::GenericMove bookMove = m_book[side]->move(m_board->key());
Chess::Move move = m_board->moveFromGenericMove(bookMove);
if (move.isNull())
return Chess::Move();
if (!m_board->isLegalMove(move))
{
qWarning("Illegal opening book move for %s: %s",
qPrintable(side.toString()),
qPrintable(m_board->moveString(move, Chess::Board::LongAlgebraic)));
return Chess::Move();
}
if (m_board->isRepetition(move))
return Chess::Move();
return move;
}
void XboardEngine::makeMove(const Chess::Move& move)
{
Q_ASSERT(!move.isNull());
QString moveString;
if (move == m_nextMove)
moveString = m_nextMoveString;
else
moveString = this->moveString(move);
// If we're not in force mode, we'll have to wait for the
// 'go' command until the move can be sent to the engine.
if (!m_forceMode)
{
if (m_nextMove.isNull())
{
m_nextMove = move;
m_nextMoveString = moveString;
return;
}
else if (move != m_nextMove)
setForceMode(true);
}
if (m_ftUsermove)
write("usermove " + moveString);
else
write(moveString);
m_nextMove = Chess::Move();
}
QString XboardEngine::moveString(const Chess::Move& move)
{
Q_ASSERT(!move.isNull());
// Xboard always uses SAN for castling moves in random variants
if (m_notation == Chess::Board::LongAlgebraic && board()->isRandomVariant())
{
QString str(board()->moveString(move, Chess::Board::StandardAlgebraic));
if (str.startsWith("O-O"))
return str;
}
return board()->moveString(move, m_notation);
}
void UciEngine::parseLine(const QString& line)
{
const QStringRef command(firstToken(line));
if (command == "info")
{
parseInfo(command);
}
else if (command == "bestmove")
{
if (state() != Thinking)
{
if (state() == FinishingGame)
pong();
else
qDebug() << "Unexpected move from" << name();
return;
}
QString moveString(nextToken(command).toString());
m_moveStrings += " " + moveString;
Chess::Move move = board()->moveFromString(moveString);
if (!move.isNull())
emitMove(move);
else
forfeit(Chess::Result::IllegalMove, moveString);
}
else if (command == "readyok")
{
pong();
}
else if (command == "uciok")
{
if (state() == Starting)
{
onProtocolStart();
ping();
}
}
else if (command == "id")
{
QStringRef tag(nextToken(command));
if (tag == "name" && name() == "UciEngine")
setName(nextToken(tag, true).toString());
}
else if (command == "registration")
{
if (nextToken(command) == "error")
{
qDebug("Failed to register UCI engine %s", qPrintable(name()));
write("register later");
}
}
else if (command == "option")
{
EngineOption* option = parseOption(command);
QString variant;
if (option == 0 || !option->isValid())
qDebug("Invalid UCI option from %s: %s",
qPrintable(name()), qPrintable(line));
else if (!(variant = variantFromUci(option->name())).isEmpty())
addVariant(variant);
else if (option->name() == "UCI_Opponent")
m_sendOpponentsName = true;
else if (option->name() == "Ponder"
|| (option->name().startsWith("UCI_") &&
option->name() != "UCI_LimitStrength" &&
option->name() != "UCI_Elo"))
{
// TODO: Deal with UCI features
}
else
{
addOption(option);
return;
}
delete option;
}
}