BillSpightsElfPositionalJudgmentExercises/Game 8 ELF's Solution

Sakata Elo, 9 dan (White) vs. Iwamote Kaoru, 8 dan, 1956. GoGoD 1956-00-00c.sgf. Komi = 4½ pts.

After W30 White has a winrate estimate of 93½% (17.9k playouts). However, Black, Iwamoto, won by resignation.

[Diagram]

White is ahead.

[Diagram]

Elf's main continuation (43.9k playouts)

B31 cuts two White groups apart. Then White has many options. W32 is Elf's top choice, but it has only 8.3k playouts. After W34 I guess the number of playouts dropped below 1.5k, which is why Elf stops there.

[Diagram]

Jump to the 3-3 loses 14%

Elf reckons that B9 loses 14% by comparison with the approach to the top left corner at a.

[Diagram]

Joseki play loses 19½%

W16 @ black+circle

According to Elf B13 loses 19½% by comparison with connecting at 14. At the time B13 was considered to be joseki, the connection was not.

[Diagram]

Elf's mainline variation for B13

B15 is an interesting sacrifice. After W18 B19 approaches the top left corner. Then W20 captures B17. B21 makes a base with sente. OC, Elf does not consider this result as good as approaching the top left corner with B9.

[Diagram]

Sagari loses 13½%

B29 secures the corner, but Elf thinks it loses 13½% by comparison with the attack at a on the white+circle stones.

[Diagram]

Elf's mainline variation for B29

After B29 White makes eye shape.


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