I try to use option "set thread x" and I didn't see any diffrents in speed of computing. For example I write
set threads 2 new game set board AQAADAAAAAAAAA set turn gnubg set player gnubg chequerplay evaluation plies 4
set dice 3 6 play show board
and I have this same time of execute when I run with options new game
set board AQAADAAAAAAAAA
set turn gnubg
set player gnubg chequerplay evaluation plies 4
set dice 3 6
play
show board