search

jnlt3 / blackmarlin

WIP Chess Engine
GNU General Public License v3.0
95 stars 7 forks source link

Negative extensions #232

Closed jnlt3 closed 9 months ago

jnlt3 commented 9 months ago

Reduce TT move if singular search cannot prove that it is better

Passed STC:

Elo   | 3.17 +- 3.07 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=8MB
LLR   | 2.95 (-2.94, 2.94) [0.00, 4.00]
Games | N: 23484 W: 5744 L: 5530 D: 12210
Penta | [173, 2707, 5779, 2899, 184]

Passed LTC:

Elo   | 3.37 +- 3.33 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.96 (-2.94, 2.94) [0.00, 4.00]
Games | N: 18996 W: 4405 L: 4221 D: 10370
Penta | [51, 2093, 5034, 2261, 59]