The endgame is a forced win for White, as follows: the White king moves to d3 then c3, then stair-step-escorts the b-pawn to b7; the White king eventually lands on b6, stalemating the Black king on b8; Black is then in zugzwang, forced to play either g6 or g5, whereupon White advances f6-7-8 (Q or R)#. Black resigned 1 - 0