FAQ

Errors

In the training data generation the number of FENs per second suddenly starts to drop or gets stuck entirely.

Unless the drop of speed is only temporary due to some other concurrent processes, the problem might be due to the generator running out of new positions, since it filters previously encountered positions using the transposition table. This can especially happen when a variant is very small (e.g., losalamos) or forced (e.g., antichess) and/or the random_multi_pv_diff very low. If this happens, try to restart generation with a higher random_multi_pv_diff and see check if this solves the problem.