Some quick comments:
I did store the search tree with early versions of Valkyria, but then
I gave it up.
Problems:
1) Searching deeper did not seem to overcome inherent fuseki weaknesses
2) The memory cost became too high
Advantage:
1) Playing fast in the opening saves time. This is very good on small boards.
Currently, I am thinking of doing something similar to a normal
opening book but with winrate statistics from played games that are
updated online. The idea is to bias search towards known good moves,
but avoid:
1) Memory costs
2) The problem of overfitting weak and strong opponents if only the
most played moves are stored and no search is done in the positions
found in the opening book.
-Magnus
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