Stockfish Chess Engine

Stockfish Chess Engine is an open source chess engine that's designed to provide you with a strong artificial intelligence when it comes to calculating chess moves. In fact, Stockfish is one of the leading algorithms in this field, and it is rated better than most grandmasters out there, which means that it's enough to put your skills to the test without doing silly mistakes in the process.

As you might have guessed, this is merely the engine itself, not an actual game. This means that you cannot play chess by simply downloading Stockfish, which can be a bit of a bother. Instead, this is a tool for developers who want to create their own games and not have to work on an algorithm from scratch, because it's not exactly easy and it takes a lot of work and dedication to match the already existing ones.

On top of that, Stockfish Chess Engine is entirely open source, which means that you are not forbidden from using it in any purpose, including selling applications that use the engine without any modifications. Thus, it's perfect if you want to practice with chess AI, as well as if you want to put forward complex video games that integrate the engine.