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I assume Alpha Go has been trained using a large number of games played by Go masters so the games it played itself probably won't provide much more information, unless it can learn its own weaknesses from those games.

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They said it was trained with the games of 5 dan and stronger players from KGS, plus self playing. No professional games and no training with the games of a specific player, because there so few of them (60-70 per year).

Although this is not the main reason, there is also a matter of intellectual property of Go game records. The official position of Korea Baduk Association is that Go game records are copyrightable.

On the other hand, it is not recognized as such in Korea, let alone in other countries. There has been multiple attempts to change the Korean copyright law to explicitly list Go game records as an example of work that can be copyrighted. All such attempts failed so far.

The official position of Korea Baduk Association is that Go game records are copyrightable.

Who owns the copyright?

Presumably, it'd be a joint copyright. When two people write a book together, both hold the copyright.

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