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		Zeta, (Zeta OpenCL Chess) an experimental open source chess engine written in OpenCL by Srdja Matovic. The engine has been in development since 2010 and was first released July 13, 2011 under the GNU GPL. Zeta supports only some basic commands of the Chess Engine Communication Protocol (Winboard/Xboard). Main features are the use of Quad-Bitboards, and its ability to run on a GPU.
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Details

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

NPS and Playing Strength

• Zeta 098c on Nvidia GeForce GTX 480, ca. 5 Mnps, est. 2000 Elo
• Zeta 097x on Nvidia GeForce GTX 480, ca. 5 Mnps, est. 1800 Elo
• Zeta 098c on AMD Radeon R9 290, ca. 3.2 Mnps
• Zeta 097x on AMD Radeon HD 7750, ca. 800 Knps

See also

• Zeta Dva

Forum Posts

• Zeta, a chess engine in OpenCL by Srdja Matovic, CCC, March 17, 2010
• Zeta plays chess on a gpu by Srdja Matovic, CCC, June 23, 2011
• ZetaOpenCL 098ew64 running on Windows OS by Norbert Raimund Leisner, CCC, November 27, 2016
• Zeta v099a, gpu chess update by Srdja Matovic, CCC, April 11, 2017

External Links

• GitHub - smatovic/Zeta: Experimental chess engine written in OpenCL
• Archived Zeta Chess blog, Wayback Machine

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