Hello, all,

I have a question from the code of leela-zero:

https://github.com/gcp/leela-zero

In UCTSearch.cpp, function play_simulation:

When we have two consecutive passes to end the game, the final node (a
second pass) will not create any new child, and the result.valid() will be
always return false. In this case, all of the parent nodes during the MCTS
process will get invalid result, and hence their node status will not be
updated.

My question is how can we update the node status here if we always get
invalid result after game finished?

Thanks!

Best,

Chao
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