mcostalba/Stockfish — pull request #25 by glinscott (2012-10-04 11:39:49+00:00)
Title: Don't null move when pin threats exist

Self testing at 40/60s+0.05s, this is how it looks so far. So, still well within error bounds, but looking quite promising.

ELO: 8.35 +- 99%: 25.48 95%: 19.34
LOS: 95.76%
Wins: 177 Losses: 146 Draws: 925 Total: 1248

I've been working my way through the patches against 2.2.2 as well. So far, the pinned piece check, and the pawn shelter change seem to be about even against komodo and critter. In self play at 40/60s+0.05s, both look like improvements still though. So, probably worth keeping them. I'm going to test the undefended pieces change next.