It was 14 wins for leela and 7 wins for sf, which is pretty large for the level they are playing at. Anyway people have thought about using GPU for chess engine but it was difficult to make work. (https://chess.stackexchange.com/questions/9772/cpu-v-gpu-for...). GPU and CPU have fundamentally different architecture and comparing them using just ops per second without taking into account their capabilities is missing the point.