Tweak queen values for midgame and endgame
authorStéphane Nicolet <cassio@free.fr>
Tue, 27 Mar 2018 15:51:11 +0000 (17:51 +0200)
committerStéphane Nicolet <cassio@free.fr>
Tue, 27 Mar 2018 15:51:11 +0000 (17:51 +0200)
commit5ce630584ca243ad0f4739bb7615702f36b9f818
tree6e2fc6d780b7332cbab453870de969b7f0e0329d
parent29070bd01a5a8e37658866ead1fbdeacc60ce9a6
Tweak queen values for midgame and endgame

Queen midgame value: -1%
Queen endgame value: +1%

This patch failed STC, but was exceptionally tested at LTC,
where it passed two independant SPRT tests with bounds [0..4]:

LTC:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 20651 W: 3191 L: 2980 D: 14480
http://tests.stockfishchess.org/tests/view/5ab73faa0ebc5902932cbdca

LTC:
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 89111 W: 13647 L: 13233 D: 62231
http://tests.stockfishchess.org/tests/view/5ab8c0e50ebc5902932cbeae

See https://github.com/official-stockfish/Stockfish/pull/1511
for the discussion of this patch.

How to continue from there?
• there is probably some more Elo gains to get from the tuning
of the queen value.

Bench: 5460229
src/types.h