BillSpightsElfPositionalJudgmentExercises/Game 6 ELF's Solution

[Diagram]

Maeda Nobuaki, 7 dan (W) - Kitani Minoru, 8 dan, Feb. 1, 1951

GoGoD 1951-02-01a, 4½ pt. komi

Assuming area scoring and 7½ pt. komi, after B37 Elf reckons White to be ahead (87½% winrate, 36.6k playouts). However, Black, Kitani, won by resignation.

[Diagram]

Elf's recommended continuation

In the actual game Maeda played W40 at a. Elf prefers the 3d line side attachment by 1% (attachment for sabaki, 66.9k playouts). Black plays the hane, B41, and White :42: replies with the 2d line counter-hane. B43 plays the two step hane and W44 connects.

[Diagram]

Elf's continuation, continued

W50 is a kind of driving tesuji. W54 switches to the top right corner, preventing Black from playing the jump attachment at a.

[Diagram]

Elf's continuation, continued. Black sabaki

Black makes sabaki in the top right, starting with the top attachment, B57.

Black's early errors

[Diagram]

Crosscut loses 18½%

68 years ago, Kitani played B11, the "AI attachment". ;) But then, after the hane, W12 , he played the crosscut, losing 18½% by comparison with the counter-hane at a.

[Diagram]

Counter-hane variation

black+circle = B23

After B13 White plays W14 and sacrifices two stones.

[Diagram]

Actual game continuation

B19 loses 11½%.

[Diagram]

Elf's variation for Black 19

W20 stands. Then Black makes four stones and sacrifices them. Then B27 starts to make sabaki for Black in the top right corner.

[Diagram]

Variation for Black 19, continued

B23 switches to the 4th line side attachment against the top left enclosure.

[Diagram]

Variation for Black 19, continued

After the exchange in the top left, B47 runs out.


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