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an experimental [[:Category:Open Source|open source chess engine]] by [[Srdja Matovic]], written in [[C]] and [[OpenCL]]. The engine has been in development since 2010 and was first released July 13, 2011 under the [[Free Software Foundation#GPL|GNU GPL]].

Zeta is written in [[C]] (host) and [[OpenCL]] (device). The host handles the IO, but all chess related computations are done in via OpenCL on the device.Zeta v097 and v098 were designed to run thousands of independent [[Thread|threads]] on a [[GPU]], therefore they store the expanded search tree via an randomized [[Best-First]]-MiniMax search in [[Memory|memory]] .

=NPS and Playing Strength= * Zeta 098c on Nvidia GeForce GTX 480v099 is a port of [[Zeta Dva]] to OpenCL, ca. 5 Mnpswith classic parallel [[Alpha-Beta]] search, est. 2000 Elo* Zeta 097x on Nvidia GeForce GTX 480therefore 64 gpu threads are coupled to one worker, ca. 5 Mnpsused during move generation, estmove picking and evaluation in parallel. 1800 Elo* Zeta 098c on AMD Radeon R9 290, ca. 3.2 Mnps* Zeta 097x v097 and v098 were designed to run thousands of independent [[Thread|threads]] on AMD Radeon HD 7750a [[GPU]], catherefore they store the expanded game tree via an parallel [[Best-First Minimax Search]] search in [[Memory|memory]] . 800 Knps

* [https://webzeta-chess.app26.de/ Zeta Chess blog]==Misc==* [https://en.archivewikipedia.org/webwiki/Zeta Zeta from Wikipedia]* [https://20140604141114en.wikipedia.org/httpwiki/Zeta_(disambiguation) Zeta (disambiguation) from Wikipedia]* [https://zeta-chessen.blogspotwikipedia.comorg/wiki/ Archived Zeta_distribution Zeta Chess blogdistribution from Wikipedia]* [https://en.wikipedia.org/wiki/Riemann_zeta_function Riemann zeta function from Wikipedia], * [https://en.wikipedia.org/wiki/Wayback_Machine Wayback MachineList_of_zeta_functions List of zeta functions from Wikipedia]