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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]].

=DetailsFeatures= Zeta is written in [[C]] (host) and [[OpenCL]] (device). The host handles the IO, but all chess related computations are done in via OpenCL (run-time-compilation) 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 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

* [http://www.talkchess.com/forum/viewtopic.php?t=62288 ZetaOpenCL 098ew64 running on Windows OS40493 LIFO stack based parallel processing?] by [[Srdja Matovic]], [[CCC]], September 22, 2011* [http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=442052&t=41853 Possible Search Algorithms for GPUs?] by [[Srdja Matovic]], [[CCC]], January 07, 2012 <ref>[[Yaron Shoham]], [[Sivan Toledo]] ('''2002'''). ''[https://www.sciencedirect.com/science/article/pii/S0004370202001959 Parallel Randomized Best-First Minimax Search]''. [https://en.wikipedia.org/wiki/Artificial_Intelligence_(journal) Artificial Intelligence], Vol. 137, Nos. 1-2</ref> <ref>[[Alberto Maria Segre]], [[Sean Forman]], [[Giovanni Resta]], [[Andrew Wildenberg]] ('''2002'''). ''[https://www.sciencedirect.com/science/article/pii/S000437020200228X Nagging: A Scalable Fault-Tolerant Paradigm for Distributed Search]''. [https://en.wikipedia.org/wiki/Artificial_Intelligence_%28journal%29 Artificial Intelligence], Vol. 140, Nos. 1-2</ref>* [http://www.talkchess.com/forum/viewtopic.php?t=44165 Help with Best-First Select-Formula] by [[Norbert Raimund LeisnerSrdja Matovic]], [[CCC]], November 27June 23, 20162012* [http://www.talkchess.com/forum/viewtopic.php?t=63719 Zeta v099a46974 Kogge Stone, Vector Based] by [[Srdja Matovic]], [[CCC]], January 22, 2013 » [[Kogge-Stone Algorithm]] <ref>[https://en.wikipedia.org/wiki/Parallel_Thread_Execution Parallel Thread Execution from Wikipedia]</ref> <ref>NVIDIA Compute PTX: Parallel Thread Execution, ISA Version 1.4, March 31, 2009, gpu [https://www.nvidia.com/content/CUDA-ptx_isa_1.4.pdf pdf]</ref>* [http://www.talkchess.com/forum/viewtopic.php?t=60386 GPU chess update, local memory...] by [[Srdja Matovic]], [[CCC]], June 06, 2016* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=72684 RMO - Randomized Move Order - yet another Lazy SMP derivate] by [[Srdja Matovic]], [[CCC]], December 30, 2019 » [[Lazy SMP]] ==2020 ...==* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=76986 Zeta with NNUE on GPU?] by [[Srdja Matovic]], [[CCC]], April 11March 31, 2021 » [[NNUE]], 2017[[GPU]]

==Chess Engine==* [https://githubgitlab.com/smatovic/Zeta GitHub GitLab - smatovic/Zeta: Experimental chess engine written in OpenCL]* [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] 

[[Category:GPLMIT]]