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Home * Engines * Stockfish * SugaR

Sugar [1]

a Stockfish derivative by Marco Zerbinati. Its appearance first discussed in CCC in October 2014 [2], SugaR XPrO 1.2 64-bit 4CPU became Stockfish version top contender in the 2017 CCRL 40/40 rating list [3]. As pointed out by Norman Schmidt, SugaR XPrO 1.3, released in September 2017, had additional code not inside the current Stockfish development version, featuring transposition tables with large pages, persistent hash, Cerebellum book, various endgame functions, fortress detection, and various tweaks and UCI options [4].

See also

Forum Posts

Re: SugaR+110317 by Marco Zerbinati, CCC, March 12, 2017

External Links

Chess Engine


feat.: Rich Brown, Larnell Lewis, Ben Wittman, Glenn Patscha, Rob Christian, Michelle Willis & Mike "Maz" Maher


  1. Sugars, clockwise from top left: White refined, unrefined, brown, unprocessed cane, Image by Romain Behar, August 26, 2006, Wikimedia Commons
  2. Sugar 2.0b x 64.0 by Tim Shackel, CCC, October 21, 2014
  3. Stockfish in CCRL 40/40, (Wayback Machine, September 23, 2017)
  4. Re: SugaR XPrO 1.3 by Norman Schmidt, CCC, September 28, 2017

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