Jet5 Chess plays quick random moves biased towards captures, queening, castling and good chess positions. It will grab a mate-in-one. Crazy, blitz chess—fun!
The famous Stockfish 10 engine. Contempt 50 (max). Movetime and aggressiveness are randomised per move. Small opening book.
Stockfish on Github
Engine coded by Colin Jenkins, and based on Fabien Letouzey's "Fruit".
Small opening book.
Samey ... so I tried randomising Lozza's movetime/depth in an attempt to provide some variation in play.
Lozza on Github