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============================== My email: jotes@go2.pl



EveAnn 3.4 NNUE - winboard chess engine. New version!

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EveAnn - winboard chess engines
Rating Chess Engines Diary CEDR=2215

EveAnn  is a small  Winboard chess engine written by Andrés Valverde.  It plays a decent chess, but is much weaker than Dirty.  Via the INI file you can set up 5 different strength levels. It plays a funny and optimistic chess so I hope you enjoy  it. 

From version 2.0 I ran  a little experiment to check how many ELO could gain a little chess engine like EveAnn using Stockfish NNUE technology. It uses Daniel Shawul library to access the SF NNUE code, and I had to compile it as a DLL (NNUE.DLL file) and write a little interface to it in Pascal so that EveAnn could access it.  To my surprise the ELO gain was huge, around +450 ELO, maybe more (I estimated around 2.800 ELO CCRL) and the best thing that encouraged me to release, it plays a very interesting and funny chess. The Pascal interface to the nnue.dll  is freely available for any use.  The NNUE file is derivated from Danasah NNUE file (thanks to Pedro Castro for his help !), reinforced with 300 million of new positions (that only gave +10-15 ELO though). If you delete or rename de NNUE file, EveAnn will run using the old HCE evaluation (Hand Crafted Evaluation), more or less like version 1.73.

v.3.1:
Some bugs fixed. Some search tweaks,  3.200 ELO CCRL aprox. June  13, 2025

EveAnn 3.1 vs other engines:

Eubos 4.04/4+44 Games
Knightx 4.42.5/4+14 Games
Illumina 31/4-24 Games
Astra 5.1.10.5/4-34 Games
Leorik 3.1.3 JA0/4-44 Games
Thorshammer 3.01 JA3/3+33 Games
Baislicka 1.0 JA2/2+22 Games
Byte-knight 3.0.02/2+22 Games
Milky 0.2.02/2+22 Games
Quirky 1.02/2+22 Games
Dinora 0.3.02/2+22 Games
Halcyon 1 JA2/2+22 Games
Eggnog 6 dev-1cc JA2/2+22 Games
Shallow Guess 0.4.02/2+22 Games
Baislicka JA 1.02/2+22 Games
Goldfinger dev-ba5 JA2/2+22 Games
Zeta-Dva 0402 JA2/2+22 Games
Olithink 5.11.32/2+22 Games
Shadowfax 1.0.1 JA2/2+22 Games
Olithink 5.11.22/2+22 Games
Prophet 4.4 JA1.5/2+12 Games


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