I run Rybka-3 under SCID and have for a long time now - both 64-bit and 32-bit
versions of Rybka-3. The problem described below has existed for many releases
now (certainly the 3.7 official release included this problem). I run 3.7.4 now
and the problem still persists.
If I attempt to edit the UCI engine properties for Rybka-3 in this way:
set Contempt Analyze to 25 (default is zero and left as default, things work
fine)
When I attempt to use the newly modified engine I get an error saying it
probably crashed. Given that this capability works with Rybka-3 under other
GUIs, I doubt it is a Rybka-3 bug.
Here is the section of engines.dat before the edit (where it runs fine) and
after the edit (where it crashes):
Before:
engine {
Name Rybka-3-32bit-1CPU
Cmd wine
Args /home/roy/chess/rybka-3/rybka3-1cpu.w32.exe
Dir /home/roy/chess/rybka-3
Elo 3052
Time 1242178741
URL {}
UCI 1
UCIoptions {{Hash 64} {MultiPV 1} {UCI_LimitStrength false} {UCI_Elo 1200}
{{Max CPUs} 1} {NalimovPath <empty>} {NalimovCache 1} {NalimovUsage Rarely}
{{Preserve Analysis} false} {{Clear Hash} {}} {{Saved Hash File} <empty>}
{{Save Hash} {}} {{Load Hash} {}} {{Persistent Hash Enabled} false}
{{Persistent Hash File} <empty>} {{Persistent Hash Play Depth} 64} {{Persistent
Hash Write Depth} 10} {{Persistent Hash Size} 16} {{Persistent Hash Reset} {}}
{{Persistent Hash Resize} {}} {{Persistent Hash Merge File} <empty>}
{{Persistent Hash Do Merge} {}} {MultiPV_cp 32768} {{Contempt Play} 15}
{{Contempt Analyze} 0} {{Time Buffer} 0}}
}
After:
engine {
Name Rybka-3-32bit-1CPU
Cmd wine
Args /home/roy/chess/rybka-3/rybka3-1cpu.w32.exe
Dir /home/roy/chess/rybka-3
Elo 3052
Time 1242178741
URL {}
UCI 1
UCIoptions {{Hash 64} {MultiPV 1} {UCI_LimitStrength false} {UCI_Elo 1200}
{{Max CPUs} 1} {NalimovPath <empty>} {NalimovCache 1} {NalimovUsage Rarely}
{{Preserve Analysis} false} {{Clear Hash} {}} {{Saved Hash File} <empty>}
{{Save Hash} {}} {{Load Hash} {}} {{Persistent Hash Enabled} false}
{{Persistent Hash File} <empty>} {{Persistent Hash Play Depth} 64} {{Persistent
Hash Write Depth} 10} {{Persistent Hash Size} 16} {{Persistent Hash Reset} {}}
{{Persistent Hash Resize} {}} {{Persistent Hash Merge File} <empty>}
{{Persistent Hash Do Merge} {}} {MultiPV_cp 32768} {{Contempt Play} 15}
{{Contempt Analyze} 25} {{Time Buffer} 0}}
}
Can someone see where the problem might be?
Thanks,
Roy
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