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was a chess playing entity based on a [https://en.wikipedia.org/wiki/Myrinet Myrinet] [https://en.wikipedia.org/wiki/Cluster_(computing) computer cluster computer] containing consisting of [[FPGA|Field Programmable Gate ArraysFPGAs]], and [[x86]] PCs.Hydra was the continuous development of the [[ChessBase]] funded FPGA project called [[Brutus]] by [[Chrilly Donninger]] et al. now under the patronage of the ''Pal Group of Companies '' <ref>[http://www.palgroup.com/ Pal Group of Companies]</ref> and [https://en.wikipedia.org/wiki/Sheikh Sheikh] [https://en.wikipedia.org/wiki/Tahnoun_bin_Mohammed_Al_Nahyan Tahnoun Bin Zayed Al Nahyan] <ref>[https://en.wikipedia.org/wiki/Al_Nahyan_family Al Nahyan family from Wikipedia]</ref> <ref>[https://en.wikipedia.org/wiki/Hydra_%28chess%29 Hydra (chess) from Wikipedia]</ref> <ref>[http://gsec.abudhabi.ae/Sites/GSEC/Navigation/EN/ExecutiveCouncil/picture-gallery.html The General Secretariat of the Executive Council - Abu Dhabi - Members' Profiles]</ref> of [https://en.wikipedia.org/wiki/Abu_Dhabi_%28city%29 Abu Dhabi], [https://en.wikipedia.org/wiki/United_Arab_Emirates United Arab Emirates]. Chief programmer of  =Tournament Play=Hydra was had its tournament debut at the [[Chrilly DonningerIPCCC 2004]] who already had experience winning clearly with 6½/7 ahead of [[Fritz]] and [[Shredder]]. Soon later, at the former FPGA[[ICT 2004]], Hydra came in behind Shredder,but taking revanche in August 2004, winning a match with 6½-Project 2½. Also the [[BrutusIPCCC 2005]]was dominated with 8/9, a half point ahead of Shredder. Hydra also achieved strong results versus humans, playing two times the [[Man vs Machine Team Championship]], and in 2005 [[Adams versus Hydra 2005|versus]] [https://en.wikipedia.org/wiki/Michael_Adams_(chess_player) Michael Adams] winning decisively with 6½-½.The chess monster further played [https://en.wikipedia.org/wiki/Advanced_Chess freestyle matches] along with its sponsor, chess lover and chess player under the pseudonym ''Zorchamp'' <ref>[https://en.chessbase.com/post/zor-champ-wins-freestyle-tournament Zor-Champ wins Freestyle Tournament] by [[Arno Nickel]], [[ChessBase|ChessBase News]], April 16, 2006</ref>, and was active on the [[Playchess]] server - its last game in June 2006 <ref>[http://en.chessbase.com/post/who-will-be-the-next-freestyle-champion Who will be the next Freestyle Champion] by [[Arno Nickel]], [[ChessBase|ChessBase News]], July 05, 2006</ref>. In June 2009, Hydra book author [[Christopher Lutz]] stated that "unfortunately the Hydra project is discontinued." The sponsors decided to end the project <ref>[https://en.wikipedia.org/wiki/Hydra_%28chess%29 Hydra (chess) from Wikipedia]</ref>. Hydra was two times winner of the [[IPCCC|International Paderborn Computer Chess Championship]], the [[IPCCC 2004]] and [[IPCCC 2005]], and was runner up at the [[ICT 2004]].

System architecture of Hydra <ref>[https://de.wikipedia.org/wiki/Hydra_(Schachcomputer) Hydra (Schachcomputer) – Wikipedia.de] (German)</ref>ran on a [https://en.wikipedia.org/wiki/Myrinet Myrinet] interconnected [[Linux]] [https://en.wikipedia.org/wiki/Computer_cluster cluster] of four (later eight) dual [[IBM PC|PC]] server nodes able to handle two [https://en.wikipedia.org/wiki/Conventional_PCI PCI] buses, which are conneced to a FPGA card each, simultaneously. The [[Parallel Search|distributed search]] algorithm ran on the [[x86]] nodes as [https://en.wikipedia.org/wiki/Message_Passing_Interface MPI] [[Process|processes]], where the last three [[Ply|plies]] of an n-ply search including [[Quiescence Search|quiescence]] and all [[Evaluation|evaluations]] are delegated to the FPGA card, typically 100.000 times per second and processor. For further information see the [[Brutus#Description|description]] of [[Brutus]].

* '''Cryptic ''' runs on modern high speed multi-processor CPU. It is programmed in mixed [[C]] and [[Assembly]] Language. It is aimed to be the world's top single machine Chess Engine.* '''Shark ''' is network based deep search meta engine. It is based on unique idea by which it reaches to depth of 25+ easily with the help of only 6 CPUs in less than a minute. Currently a dual core CPU takes more than an hour to reach to this depth.

* [[Chrilly Donninger]], [[Ulf Lorenz]] ('''2004'''). ''[http://www.springerlink.com/content/hp9la9pwq0a1cmrp/ The Chess Monster Hydra]''. in [http://www.springerlink.com/content/8grv6pu2e8hd/?p=3037c8af6a0147319f6f5a8e133083dd&pi=0 Field Programmable Logic and Application], 14th International Conference, FPL 2004, Leuven, Belgium, August 30-September 1, 2004[https://en. Proceedings, pp 927-932wikipedia. org/wiki/Springer_Science%2BBusiness_Media Springer Berlin / Heidelberg, ISBN 978-3-540-22989-6], [http://www2.cswww.unitop-paderborn5000.de/cs/ag-monien/PERSONAL/FLULOnl/publicationsps/fpl04The%20chess%20monster%20Hydra.pdf pdf]

* [[Chrilly Donninger]], [[Ulf Lorenz]] ('''2005'''). ''The Hydra project''. Xcell Journal, Issue 53, pp. 94–97, [https://www.xilinx.com/publications/archives/xcell/Xcell53.pdf pdf]

* [https://wwwen.donau-unichessbase.ac.atcom/enpost/aktuell/news/archiv/02436/index.php From Brutus to Hydra nine-headed-monster-wins-paderborn Nine- The mathematician Donninger about the evolution of his chess programheaded monster wins Paderborn], [[ChessBase|ChessBase News]], February 15, 2004* [https://en.wikipediachessbase.orgcom/wikipost/Danube_University_Krems Danube University Kremshydra-shocks-shredder-with-2-0-lead Hydra shocks Shredder with 2-0 lead], [[ChessBase|ChessBase News]], January 19August 16, 2004