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Tweak queen values for midgame and endgame

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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
This commit is contained in:
Stéphane Nicolet 2018-03-27 17:51:11 +02:00
parent 29070bd01a
commit 5ce630584c
1 changed files with 1 additions and 1 deletions
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2
src/types.h
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@ -187,7 +187,7 @@ enum Value : int {
KnightValueMg = 764, KnightValueEg = 848,
BishopValueMg = 826, BishopValueEg = 891,
RookValueMg = 1282, RookValueEg = 1373,
QueenValueMg = 2526, QueenValueEg = 2646,
QueenValueMg = 2500, QueenValueEg = 2670,
MidgameLimit = 15258, EndgameLimit = 3915
};