Zeta is an Chess Engine written in OpenCL,
it uses an Best-First-Search, MonteCarlo-AlphaBeta,
and reaches on an Nvidia GTX 580 about 1800 Elo points.

Sources
https://github.com/smatovic/Zeta/tree/zeta_cl_097x

Blog
http://zeta-chess.blogspot.com/

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Srdja