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



EveAnn 5.0 - new version chess engine!

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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.

EveAnn 5.0 what's new?:

First EveAnn UCI versión. Winboard protocol still available but UCI is the default one from now on. Use it if posible. Overall structure has been enhanced and several bugs fixed. 
Some tweaks in LMR and LMP
Counter move added for move ordering.
Compiled with Free Pascal for the first time instead of Delphi
Expected +20 ELO over 4.0 versión
Bench : 142.465 nodes (NNUE mode) 

EveAnn 4.0 vs other engines:

Cwtch 54/9-19 games
Raphael 3.3.00.5/7-67 games
Minke 5.0.0 JA1/6-46 games
Ynode 02341/6-46 games
Sturddle 2.5.02/5-15 games
Prune 3.2.11.5/5-25 games
Illumina 3.0 JA1/5-35 games
Zangdar 6.1.10/4-44 games
Critter 1.6a0.5/3-23 games
Rusty Rival 1.0.372/2+22 games
Radiance 4.32/2+22 games
OxideChessEngine 1.0.02/2+22 games
Nagato 1.1.02/2+22 games
Chess-3 4.02/2+22 games
Chal 1.4.02/2+22 games
Beast 3.3.12/2+22 games
Barracuda-V72/2+22 games
AspireBot v22/2+22 games
Whitespine 1.3.32/2+22 games
Solo 2.0.02/2+22 games
Vex 0.4.10 JA2/2+22 games


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