Tewari Example 5

   

From this [ext] Asahi newspaper site. Black played B1 - B3, allowing White to play the big point at W4.

Ishida Akira, commenting on the game, said that if Black had not played B1, but had taken a big point himself, for White to play at 1 would have been absolute. He appealed to the following tewari diagram.

[Diagram]

Tewari

In this position the exchange, B1 - W2, is bad for Black.

This example is also present in Ishida Yoshio's Dictionary of Basic Joseki, vol.3.



LZ does not agree with Ishida's analysis

[Diagram]

Leela Zero's analysis

Before B1, LZ estimates Black's chances at 40%. After this exchange they drop to 30%. Most likely this is because Black sacrifices the corner, while living there is more to LZ's liking.

[Diagram]

Leela Zero's preference

LZ wants to force at B1 first, then make sabaki in the corner

[Diagram]

Leela Zero's preference (ctd)

And then it unfolds like this.


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