March 15, 2009

I've continued to make some code fixes and some search/scoring improvements. Plus some work on the opening book. I'm hoping to release the latest code as version 11.3 sometime soon after the upcoming CCT 11 tournament.

Summary of changes so far:

1. Fix bug that caused occasional early search termination.
2. Fix Winboard communication to use a thread for greater reliablity.
3. Keep game file open - fixes some occasional failures to save games.
4. Fix Makefile to build "pgn2book" utility (some code fixes in this too).
5. Some search changes: Lessen futility margin. Enable additional extensions at ply 0. Enable a version of razoring.
6. Improved move ordering based on node counts.
7. Bug fix in outpost scoring.
8. Passed pawn scores increased.
9. Bug fix in GUI: bad PV display at high search depths.
10. Larger opening book.