Later in the game, 1620-00-00ap, between Nakamura Doseki (W) and Yasui Santetsu.

White to play.

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[go]$$Bcm23 White to play. Which way?
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How should White reply to the press, ? Should White push through and cut, or should White crawl on the 3d line? Nakamura chose one, but the other was 12% better, according to Elf (assuming komi, which the game did not have, OC).

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

I love this series, but I always wonder why not using katago with 0 or 0.5 komi? Why o ly Elfv2?

Because the GoGoD Elf commentaries have already done the heavy lifting, with a large number of rollouts per move. I don't have to spend any time waiting for results.

As for 0 or 0.5 komi, that would be valuable, but I am interested here in how to play under modern conditions.

Edit: And why bother with pre-komi games? First, because human opening theory is largely based upon best play in the late 19th century, and a lot of ideas go back even further. And, surprisingly, AI often endorse those plays in those games, komi or no komi. Second, because these games and their mistakes are easier to explain. For me, anyway. But that is because I learned 20th century opening theory, which overestimated side extensions from the 4-4. From AI I have learned that they are mistakes, but I really can't explain why. Now, in the 17th century top players may have made mistakes by playing on the side, but those mistakes I can explain.

For example, in this game may be considered as a refutation of White's extension to C-11. It's not, but it's a good try. If White plays the jump attachment at E-16, C-11 becomes a good play. (Not that Santetsu thought that C-11 was a mistake, but he knew that E-16 would have been a good followup for White.) These are things that I learned at Mother Takagawa's knee.

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

With two stones in support no doubt AI will cut

I recall that there's a theme with this side shape that Black can't find a good time to stop pushing White. If he pushes once or twice, hane is severe, three times and the hane is a tiger's mouth, but the fourth push is gote. Also White's push damages the pincer stone, which is unpleasant with the top right shape. I think the computer will crawl.

You mean with that extra stone that will become overconcentrated after pushing and cutting gives black momentum to damage the other one?

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.