Cap evaluation based null move extra reduction to three plies
authorJoona Kiiski <joona.kiiski@gmail.com>
Thu, 25 Sep 2014 19:42:25 +0000 (20:42 +0100)
committerJoona Kiiski <joona.kiiski@gmail.com>
Thu, 25 Sep 2014 19:42:25 +0000 (20:42 +0100)
commit7ed15af371be19a4d261df87fa33df0a94fdc930
tree6c09abaca85afcb46848e45070d4d0da77166862
parentd6613b758954fac5c8ac16a5352f4a85848a3d6f
Cap evaluation based null move extra reduction to three plies

It's a zero elo patch, and a reasonable safeguard against uncontrolled extreme reductions.

STC:
ELO: -0.08 +-2.0 (95%) LOS: 46.9%
Total: 40000 W: 6728 L: 6737 D: 26535

LTC:
ELO: -0.14 +-1.8 (95%) LOS: 44.0%
Total: 40000 W: 5557 L: 5573 D: 28870

Bench: 7201830
src/search.cpp