This is a strong open source chess engine which is offered for free, and is available for both desktop and mobile platforms.
Stockfish has consistently ranked number one or near the top of most chess engine rating lists, and is one of the strongest open-source engines worldwide. It uses up to 512 CPU cores in multiprocessor systems, with a maximal transposition table size of 1 terabyte.
Features include an alpha-beta search, bitboards, great search depth because of more aggressive pruning and late move reductions, and support for Chess960, plus much more.
The program comes from the Glaurung, an open-source chess engine released first in 2004, and four years later, Costalba took over and renamed it Stockfish because it was produced in Norway and cooked in Italy Costalba is Italian, and Romstad (creator of Glaurung) is Norwegian.
Stockfish is powerful and much stronger than the best human chess grandmasters. Unlike most chess engines, it is open source (GPL License), so you can read the code, modify it, contribute back and use it in your own projects.
You can also run it anywhere, including Windows operating system and on your smart devices, so you can get world-class chess analysis wherever you are.
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5 best software to analyze chess games in 2019 - WindowsReport.com