Integral is a UCI-compliant chess engine developed in C++. It is a personal project developed with the goal of meshing my admiration for chess with programming.

Play against Integral on Lichess

Integral supports the following UCI commands:

• uci Prints information about Integral and replies with uciok
• ucinewgame Sets up a new game and clears the transposition table
• isready Replies with readyok
• position startpos Sets the board state and pieces to the starting position
• position fen <string> Sets the board state and pieces to the given FEN string
• position fen <string> moves <e2e4 e7e5 ...> Plays the given moves from the FEN position
• go depth <depth> Searches up to the given depth and replies with bestmove <move>
• go infinite Searches up to the maximum search depth (100) and replies with bestmove <move>
• go wtime <time> btime <time> winc <inc> binc <inc> Searches for and replies with the best move given within the time/increment allotted. The amount of time used is managed by an internal time management system to ensure the engine doesn't run out of time.
• go movetime <time> Searches for the best move using the full time allotted.

To compile Integral, enter the following commands in a terminal:

git clone https://github.com/aronpetko/integral
cd integral
cmake .
make

Integral is estimated to be around 2700 CCRL Blitz. Unfortunately, there is no accurate way to translate chess engine ratings to human ratings. A very rough estimate would be that Integral can consistently beat 2400 FIDE-rated players.