They say about it

Stefano Cardanobile, Stockfish community

• Ho dato una scorsa al tuo repository su github, e devo ammettere che hai fatto un gran lavoro!

ICCF GM Fabio Finocchiaro, 25th World Correspondence Chess Champion (2009–2013)

• ho utilizzato il tuo motore assieme a Stockfish per analizzare le mie partite. Ambedue i motori fanno le stesse mosse. Però il tuo per 2 volte è stato più veloce,complimenti.

Marc Casale (entraîneur d'échecs au club du Val d'Yerres 91, France)

• ShashChess était inconnu de moi et il a obtenu 100% en tactique, 100% en positionnel et 100% en finales...The best engine ! Meilleur que Komodo, Houdini, sugar ou stockfisch développement...moteur dont je ne peux plus me passer !

Eduard Nemeth

• I'm very surprised about the strength. Personally, I'm more interested in analysis. And here I really liked ShashChess. The evaluation of ShashChess is really good! Thanks for this wonderful engine. It will be very useful to me in analyzing.

ICCF GM Matjaž Pirš

• Your way is correct: very good. All best form Germany for your work! Your engine is very good.