Lise is Beginner chess engine re-written in Dart which uses mixture of opening book + negamax + minimax. Lise can play well known opening pawn structures/ piece placement and plays intermediate middlegame/opening play and beginner endgame play.

Engine uses Dart chess library for legal chess move generation, chess rules checks, etc.

• Beating Stockfish level 1

• drawing 3 times to beginner trained Maia Chess engine

Lise is a beginner engine, who has some sense of opening pawn structures and plays middlegame/endgame like a beginner to intermediate player.

Algorithms

LiseChessEngine uses Minimax, Negamax and Opening book

Opening Book

White openings:

• Queens Gambit
• Kings Gambit
• g3 system
• london

Black Openings:

• French
• Caro can
• Slav
• KID
• Ownes Opening

Negamax Algorithm Chessprogramming.org

• runs on depth 3, more the depth better move but slower search
• functions with eval function

Eval function

• takes account of chess board area and all legal moves
• gives white double the advantage compared to black to play as a defensive player as black, attacking player as white.

anyone who would like to work on this, please do

Lise is still being worked on, with intentions to add

• A full tablebase support for better endgame play
• more opening support
• support for playing white side
• support for tactics creation
• transition to NN for dynamic piece values

• make sure to have dart installed
• git clone
• cd chess_enginelise
• enter command dart run

you will see lise playing itself a sample game of 4 moves.

this is remake of older version of Lise chess engine which was written in Java, can more learn about Java version here

This engine is not supported any more by me as its a very basic chess engine, Liquid (one written in Java) gets active contributions which is runnable as UCI command line engine.