In case Crafty plays weak...

[Volker Pittlik]

I played around with Crafty 23.0 a bit. I run a 64 bit Linux and compiled the executable from the source code.
The results in my test were terrible: about 250 rating points (BayesElo) below version 22.9. Because this just cannot be
and also no such weakness was reported elsewhere I took a close look at the Makefile and found:

Code: Select all

opt='$(opt) -DDEBUG -DTRACE -DINLINE32 -DCPUS=2' \

for the "Linux" target. Of course making a debug version will slow it down significantly.

I could confirm it in the benchmark:

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Crafty v23.0 (1 cpus, -debug version-)

White(1): bench
Running benchmark. . .
......
Total nodes: 97386586
Raw nodes per second: 275227
Total elapsed time: 353.84
################################################################################

Crafty v23.0 (1 cpus -normal version-))

White(1): bench
Running benchmark. . .
......
Total nodes: 97386586
Raw nodes per second: 1808814
Total elapsed time: 53.84


I'm going to replay the Crafty games and could post the results here in case of interest.

vp