UCI chess engine
Sunfish: a Python Chess Engine in 111 lines of code
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Chess application whichs allows working with chess PDF books and PGNs.
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NetChess to play between two players over net or internet
a UCI chess engine
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Visualizations for machine learning datasets
SJCE - free portable cross-platform graphical chess game, 100% Java.
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An extremely strong chess engine.
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Port of UCI to Javascript
UCI chess engine
Yet Another Chess ENgine