Author: Dann Corbit
Date: 20:49:47 05/21/02
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On May 21, 2002 at 23:17:21, Jon Dart wrote: >On May 21, 2002 at 22:37:12, Dann Corbit wrote: > >Changes include: > > 1) The king safety routine has been rewritten for greater >speed and accuracy. > 2) The search routine has been recoded. Futility >pruning (regular, not extended) as described by Ernst Heinz >is implemented. Razoring is now done in the main search >routine and not in a separate one as in 5.4. Extensions have >been changed, and check extensions now depend on the number >of escape squares available to the king. > 3) More elaborate lazy evaluation is done in the scoring >module and more aggressive forward pruning in the quiescence >search. > 4) Passed pawn scores have been increased, as have bonuses >for king centrality in the endgame (plus king near pawns, >if the pawns are on one side of the board). > 5) Lots of fixes in the Winboard/xboard driver (arasanx.cpp), >for greater reliability and to get it to work under Linux using >xboard. > 6) A smaller hand-tuned book is used with this version. > 7) Book learning based on game results is implemented. Some fixes >and enhancements were also made to positional learning. > 8) There is support for compressed Nalimov tablebases, Winboard >protocol version 2, and Winboard analyze mode. Any approximate time frame (if any) on the release of 6.0?
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