Odd. I counted over 700 games I played with v2.0.34, including 400+ 4CPU ones, and only found one game that had to be replayed. It was from the 4CPU test, but I cannot determine now what was the error or if the error was on Schooner's part.
It's installed as an xboard engine under Cute Chess, using 512 MB hash as well.
I recall seeing precisely this error with another engine. The situation was different but I suspect that underlying cause is the same -- undefined behavior possibly caused by a bug in the hashtable code.
tpoppins wrote: ↑Tue Apr 02, 2019 7:44 pm
The situation was different but I suspect that underlying cause is the same -- undefined behavior possibly caused by a bug in the hashtable code.
Another possibility may be incompatible mmx or sse hardware. Try using Schooner's non-popcount generic version.