Changes

[[FILE:zahak_logo.jpegjpg|border|right|thumb| <center>Zahak's Logo <ref>[https://github.com/amanjpro/zahak#zahak GitHub - amanjpro/zahak: A UCI compatible chess AI in Go - Name]</ref> - Designed by Nasrin Zaza <ref>[https://www.linkedin.com/in/nasrin-zaza Nasrin Zaza · LinkedIn Profile]</ref></center>]]

Since version 7, Zahak's hand crafted [[Evaluation Function | evaluation function]] is replaced with an [[NNUE | NNUE style]] evaluation, which is trained by a from scratch written trainer, that is written in [[Go]] as well<ref>[https://github.com/amanjpro/zahak-trainer amanjpro/zahak-trainer · GitHub]</ref>. The network is trained on self-play games between different versions of Zahak. As of version 8, Zahak features an own network architecture which consists of 769 input features, that represents all the pieces on the board as well as a feature to represent white-to-move. The training process is thoroughly documented<ref>[https://github.com/amanjpro/zahak/blob/master/training.md Training Documentation · amanjpro/zahak · GitHub]</ref>. As of the time of this writing, Zahak is the only [[NNUE]] engine that is written in [[Go]].

Zahak started its first debut in [[TCEC]] in Swiss 2 event of S21<ref>[https://wiki.chessdom.org/TCEC_Swiss_2 TCEC Swiss 2 Wiki]</ref>.

==Name=Etymology=Zahak (or Zahhak or Azhi Dahak) is an evil figure in Iranian/Kurdish/Perisan mythology, evident in ancient Iranian folklore as Azhi Dahāka, the name by which he also appears in the texts of the Avesta. Legend has it, that he had two giant snakes on his shoulders and he had to feed them two human brains on daily basis<ref>[https://en.wikipedia.org/wiki/Zahhak Zahhak · from Wikipedia]</ref>.

** [[Futility Pruning#MoveCountBasedPruning|Late Move Pruning]]

==2021==* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76855&sid=9c19c86d4a40d94c20f01f0dfb046304 Zahak's announcement, a GoLang based chess engine] by [[Amanj Sherwany]], [[Computer Chess Forums|CCRL Discussion BoardCCC]], March 13, 2021 =External Links===Chess Engine==* [https://github.com/amanjpro/zahak GitHub - amanjpro/zahak: A UCI compatible chess AI in Go]* [https://ccrl.chessdom.com/ccrl/4040/cgi/compare_engines.cgi?family=Zahak&print=Rating+list&print=Results+table&print=LOS+table&print=Ponder+hit+table&print=Eval+difference+table&print=Comopp+gamenum+table&print=Overlap+table&print=Score+with+common+opponents Zahak in CCRL 40/15]==Misc==* [https://en.wikipedia.org/wiki/Zahhak Zahhak from Wikipedia]