In gnubg-cli doesn't work command "set player gnubg chequerplay evaluation plies 4" and/or "set player gnubg cubedecision evaluation plies 4". When I use that option in gnubg I must wait because computer compute. Using gnubg from command line it's so fast like without that option (I'm also try to use option "set player gnubg chequerplay evaluation plies 5" and I have this same effect in gnubg-cli). I played a lot with computer using command line. It's the reason why I thought that computer isn't so good :).