you have this distribution at the end of the tree search you have a distribution where you say okay this move right here is clearly the best move i'm going to play this however if this is one of the first 20 moves of the game they say no we need a bit of diversity uh so we're going to sample according to this distribution rather than just play the best one now this number 20. it's just sort of decided arbitrary right and if you consider something like torpedo it's a faster game so you're faster in opening faster make