[Chessx-users] GUI sending ucinewgame inappropriately?

[Louis Z. <zu...@la...>]

Hi,

I'm using version 1.1.0.0, with Stockfish (a UCI engine).

I paste a fen and click analyze. While the analysis is ongoing, I make a move on the board. The previous analysis stops and a new analysis is begun.

However, it seems that the GUI is sending the ucinewgame command each time I make a move, immediately after it sends the stop command to the engine. This has the effect (at least with Stockfish) of clearing the hash, which is highly undesirable if one is analyzing a line of play.

bool UCIEngine::startAnalysis(const Board& board, int nv, int mt)
{
    m_mpv = nv;
    m_moveTime = mt;
    if(!isActive())
    {
        return false;
    }

    if(m_board == board)
    {
        return true;
    }
    m_board = board;

    m_position = board.toFen();
    m_waitingOn = "ucinewgame";
    send("stop");
    send("ucinewgame");
    send("isready");
    setAnalyzing(true);

    return true;
}

The UCI protocol suggests that sending ucinewgame in this situation is incorrect:

 * ucinewgame
   this is sent to the engine when the next search (started with "position" and "go") will be *from
   a different game*. This can be a new game the engine should play or a new game it should analyse but
   also the next position from a testsuite with positions only.

This behavior does not seem to exist in 0.9.7.0 (which I had and could check).

How can I work around this, or do I need to edit source code and recompile to achieve what I want?

Thanks,
Louis