Before the MCTS-era my program Viking used pattern matching against a
database of games by pros, amatuers and manually added openings. From
a cosmetic point of view it played more reasonable, but I never felt
it had any impact on the playing strength itself. This was before
MCTS-search so the program was very weak in the middle game and how
the opening moves were played did not matter much.
Also even if my system of imitating pro moves might had surprised a
pro, most human opponents would deviate from the databse so early that
it would have little effect. I tried to solve that by making partial
board matches to the database, but inevitably this did not take it far.
Opening books are very useful for 9x9 but I think it will take a long
time before anyone has a book that win games without searching with a
strong program.
I guess the best approach for 19x19 is local pattern matching that
also can handle large joseki patterns, but still use full board search
to verify all "likely" local moves.
Best
Magnus
Quoting Aja <[email protected]>:
Hi Hendrik,
In the Olympiad last year in Kanazawa, I noticed that Fuego was using a
small 19x19 opening book. It successfully forced Fuego to play at the
corner in the beginning.
In Erica, I never tried using a book in 19x19 board. As far as I know,
Many Faces is not using a book. pachi is apparently without a book
either.
Aja
----- Original Message ----- From: "Hendrik Baier"
<[email protected]>
To: <[email protected]>
Sent: Monday, July 11, 2011 8:13 PM
Subject: [Computer-go] 19x19 opening books
Good morning,
I'm sorry I have to repeat my question: Can anyone point me to a
paper on opening books in 19x19 Go? Or have you seen only cosmetic
improvements by using them, but no strength improvements?
It would be great if some of you program authors could give a
one-line answer on that.
best regards,
Hendrik Baier
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