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New Critter is available from http://critterchess.sourceforge.net/

Version 0.39 (2009.06.07)
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* fixed a bug in attack table generation (which caused misbehaving king safety eval)
* added LMR and futility pruning
* added zugzwang verification search
* tweaked time management
* draw by insufficient material detection
* pondering

Thanks Richard.

Unfortunately some bugs have slipped in, so I made a bugfix release 0.39a. Thanks to Olivier for testing and bug-reporting

Played 200 games (5'+3'') so far without crashing, so I hope it is stable now.

copy-paste from changelog:

Code: Select all

Version 0.39a (2009.06.12)
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* bugfix release only - playing strength same as plain 0.39
* fixed a crash when engine wants to display a PV and there is no PV available yet
* fixed a deadlock when input thread receives 'ponderhit' before thinking thread started to ponder
* fixed PV display when running under polyglot (was sending algebraic notation instead of coordinate)