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Torch is a closed-source chess engine created by Chess.com. [30] [31] Torch has finished second in several Chess.com Computer Chess Championship events, only behind Stockfish in each case. [32] It initially participated in the tournament under the name "Mystery". [31] [33] It is freely useable through Chess.com's analysis page. [34]
Android app based chess gaming app Droidfish employs both CuckooChess and Stockfish chess engines. [3] Similarly, Kickstarter funded AI based virtual reality chess game Square Off also uses CuckooChess engine. [4] It has an ELO rating of 2583 (as of July 2018) and a rank of 135‑137 in the Computer Chess Rating List. [5]
Most contemporary chess engines are command-line programs which generate chess moves, but which require a separate chess graphical user interface in order to display a chessboard. The main article for this category is Chess engine .
The uci_limitstrength parameter tells engines with this feature to play at a lower level. The uci_elo parameter specifies the Elo rating at which the engine will aim to play. Engines that have implemented uci_elo include Delfi , Fritz , Hiarcs , Houdini , Junior , Rybka , Shredder , Sjeng and Stockfish .
The engine's Elo rating fluctuates at around 1900 when playing orthodox chess in CCRL 40/40 chess engine tournament, which roughly corresponds to class A human player. [ 15 ] The author of the program has said "the goal of Fairy-Max is to make an entertaining but beatable opponent to play against in all kind of chess variants."
Universal Chess Interface (UCI) engines such as Fritz or Rybka may have a built-in mechanism for reducing the Elo rating of the engine (via UCI's uci_limitstrength and uci_elo parameters). Some versions of Fritz have a Handicap and Fun mode for limiting the current engine or changing the percentage of mistakes it makes or changing its style.
Stockfish has been one of the strongest chess engines in the world for several years; [3] [4] [5] it has won all main events of the Top Chess Engine Championship (TCEC) and the Chess.com Computer Chess Championship (CCC) since 2020 and, as of 16 November 2024, is the strongest CPU chess engine in the world with an estimated Elo rating of 3642 ...
The meaning of the term "chess engine" has evolved over time. In 1986, Linda and Tony Scherzer entered their program Bebe into the 4th World Computer Chess Championship, running it on "Chess Engine," their brand name for the chess computer hardware [2] made, and marketed by their company Sys-10, Inc. [3] By 1990 the developers of Deep Blue, Feng-hsiung Hsu and Murray Campbell, were writing of ...