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Chess engine: Drofa 4.1.1 JA (Windows and Linux)

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Drofa - UCI chess engine (written in C++11), Author: Alexander Litov.
Rating Chess Engines Diary CEDR=3285
Drofa started as fork of the Shallow Blue chess engine. 

v.4.1.1:
Drofa v4.1.1 64 ja
Windows/Linux clang profiled builds 

Major gainers:
Tuning of the pre-move-loop pruning
SEE rewrite, in accordance to what is used in top engines
Using ALPHA cutoffs in the TT
SPSA of the incremental TM (big thanks for AGE for implementing SPSA for openbench)
Rewriting TT allocation and probing
Regression on the Pohl.pgn book

Elo   | 51.91 +- 3.55 (95%)
Conf  | 40.0+0.40s Threads=1 Hash=64MB
Games | N: 20000 W: 6892 L: 3926 D: 9182
Penta | [150, 1510, 4217, 3470, 653]
You can expect much less elo on a balanced books and/or while using non-incremental TM

As per usual, choose the binary with best speed, but building using make should give a better binary


Drofa 4.1.0 - results:
Mida 2.310/17+317 Games
Protej 20231212a11.5/15+815 Games
Cool Iris 11.800.5/15-1415 Games
Obsidian 9.00/15-1515 Games
Stormphrax 4.0.01.5/14-1114 Games
Lynx 1.1.012.5/13+1213 Games
RukChess 3.0.186/13-113 Games
Pedantic 0.6.08/11+511 Games
Knightx 3.99.5/10+910 Games
Princhess 0.15.19/10+810 Games
TACTICAL 1612231.5/9-69 Games
Incognito 50.5/8-78 Games
Vividmind 1.06/6+66 Games
Lxna 0.3.16/6+66 Games
Zagreus 4.06/6+66 Games
Austerlitz 1.4.75.5/6+56 Games
LTChess 9.34/6+26 Games
Alexandria 5.1.01/6-46 Games
Clover 6.10.5/6-56 Games
CorChess 202312190.5/6-56 Games
YuliGM PrO 150/6-66 Games


Drofa 4.1.1 JA - downloadDrofa 4.1.1 JA - download


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