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Fornax is a low-rated chess engine, written in C/C++. It supports the main parts of the UCI protocol, so it should work with various chess GUIs and other programs. Version 4.0 of Fornax has an elo rating of ~2500 at CCRL (Computer Chess Rating Lists) Blitz and 40/15 time controls.

It is written from scratch and reuses no code from any other programs. However, most of the ideas and concepts are not my own but taken from other authors and from sites such as chessprogramming.org and talkchess.com/forum3. This includes ideas such as min-max, alpha beta pruning, PVS, transpositions tables, Zobrist hashing, null move pruning, LMR, bitboard representation, piece square tables, pawn evaluation techniques and more.

You can also challenge it on Lichess: lichess.org/@/fornax-engine!