But I would still like to know how many MC evaluations it would take
until all corners look at least somewhat similar... I bet that is many
more than we see used currently - if it ever gets there.
The approach I take in Valkyria is radically different. I simply prune all
symmetric moves. For example on 9x9 without a book, Valkyria will only
evaluate
5 moves 3-3, 3-4, 3-5, 4-4, 4-5, and 5-5. But even doing so the real
difference
between these moves if ther is any is so small it is a waste of time trying to
find it out so when the book is used any of these moves are played with equal
probability.
I added this feature to increase the opening strength in 7x7, but although it
helps it still just fraction what is necessary to actually find the best line
of play for sure.
-Magnus
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