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Leela Chess Zero (abbreviated as LCZero, lc0) is a free, open-source chess engine and volunteer computing project based on Google's AlphaZero engine. It was spearheaded by Gary Linscott, a developer for the Stockfish chess engine, and adapted from the Leela Zero Go engine.
Stockfish is a TCEC multiple-time champion and the current leader in trophy count. Ever since TCEC restarted in 2013, Stockfish has finished first or second in every season except one. Stockfish finished second in TCEC Season 4 and 5, with scores of 23–25 first against Houdini 3 and later against Komodo 1142 in the
Starting from Season 11 however, Stockfish improved at a rate that left its rivals behind, crushing Komodo in Season 12 and 13. The advent of the neural network engine Leela Chess Zero meant Komodo has largely failed to qualify for the superfinal since, with a single exception in Season 22, when it lost to Stockfish. Although Komodo has not ...
After four hours of training, DeepMind estimated AlphaZero was playing chess at a higher Elo rating than Stockfish 8; after nine hours of training, the algorithm defeated Stockfish 8 in a time-controlled 100-game tournament (28 wins, 0 losses, and 72 draws). [2] [3] [4] The trained algorithm played on a single machine with four TPUs.
[4] [5] On 6 August 2020, NNUE was for the first time ported to a chess engine, Stockfish 12. [6] [7] Since 2021, many of the top rated classical chess engines such as Komodo Dragon have an NNUE implementation to remain competitive. NNUE runs efficiently on central processing units (CPU) without a requirement for a graphics processing unit (GPU).
Board representation in computer chess is a data structure in a chess program representing the position on the chessboard and associated game state. [1] Board representation is fundamental to all aspects of a chess program including move generation, the evaluation function, and making and unmaking moves (i.e. search) as well as maintaining the state of the game during play.
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 ...
A typical interface for querying a tablebase. In chess, the endgame tablebase, or simply tablebase, is a computerised database containing precalculated evaluations of endgame positions.