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:
Little changes in LMR, Lazy Eval . Now the engine prune less but scores are more real and play style is more of my "taste". Engine gets low depths because its outdated structure, sorry. Time management a bit more agressive (spend more time in first moves) +30 ELO improvement in 12'+8" (VLTC)
Only 64-bit versión available (if you need the 32-bit one I could build an special one).
This might be the last Winboard version. Next Will be (hopefully) UCI
Around 3.140 ELO CCRL
Bench 2 : 514.728 nodes
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