ShashChess 16 on Mac M1

[criko]

Hi all,

ShashChess 16 does not produce al learning file (Persisted learning = Standard) on Mac M1.

The file is produced during running eng matches, but after the match it is deleted.

There must be something wrong in tt.cpp.

Code: Select all

void writeLearningFile()
{
    /*
      To avoid any problems when saving to experience file, we will actually do the following:
      1) Save new experience to "experience_new.bin"
      2) Remove "experience.bin"
      3) Rename "experience_new.bin" to "experience.bin"

      This approach is failproof so that the old file is only removed when the new file is sufccessfully saved!
      If, for whatever odd reason, the engine is able to execute step (1) and (2) and fails to execute step (3)
      i.e., we end up with experience0.bin then it is not a problem since the file will be loaded anyway the next
      time the engine starts!
    */
    if (!globalLearningHT.empty())
    {
        std::ofstream outputFile(Utility::map_path("experience_new.bin"), std::ofstream::trunc | std::ofstream::binary);
        for (auto& it : globalLearningHT)
        {
            LearningFileEntry currentFileExpEntry;
            NodeInfo currentNodeInfo = it.second;
            int siblingMoveInfoSize = currentNodeInfo.siblingMoveInfo.size();
            for (int k = 0; k < siblingMoveInfoSize; k++)
            {
                MoveInfo currentLatestMoveInfo = currentNodeInfo.siblingMoveInfo[k];
                currentFileExpEntry.depth = currentLatestMoveInfo.depth;
                currentFileExpEntry.hashKey = it.first;
                currentFileExpEntry.move = currentLatestMoveInfo.move;
                currentFileExpEntry.score = currentLatestMoveInfo.score;
                currentFileExpEntry.performance = currentLatestMoveInfo.performance;
                outputFile.write((char*)&currentFileExpEntry, sizeof(currentFileExpEntry));
            }
        }
        outputFile.close();

        remove(Utility::map_path("experience.bin").c_str());
        rename(Utility::map_path("experience_new.bin").c_str(), Utility::map_path("experience.bin").c_str());
    }
}

[Dann Corbit]

That is tragic, because it makes pure gold on Windows.
After I run a long analysis, the experience.bin file gives shashchess 16 and ENORMOUS advantage at traditional time controls.

[criko]

That is tragic, because it makes pure gold on Windows.
After I run a long analysis, the experience.bin file gives shashchess 16 and ENORMOUS advantage at traditional time controls.

What a pitty that the author can't answer himself :-/

[Dann Corbit]

What UCI parameter settings are you using?
You must have read only turned off for the learning or it will not write.

[Dann Corbit]

I also think you should be able to use the experience file I created. You should give it a try.

[criko]

What UCI parameter settings are you using?
You must have read only turned off for the learning or it will not write.

Persisted learning=Standard and read only off!