BillSpightsElfPositionalJudgmentExercises/Game 13 ELF's Solution

Lee Changho, 7 dan (W) - Choe Myeonghun, 4 dan 1995-11-13c

After W30 Elf gives White a winrate of 88½% (30k playouts). White, Lee Changho, won by resignation.

[Diagram]

Elf's continuation.

[Diagram]

Elf's mainline continuation

B31 - B33 were played in the game, as well as Elf's top choices. W34 - B39 are Elf's mainline variation.

Earlier in the game.

[Diagram]

Boshi loses 17%

B17 was totally off Elf's radar.

Elf's mainline variation for B17.

[Diagram]

Elf's mainline for B17

With a winrate estimate of 58% (27.7k playouts), B17 is an example of the importance of occupying the last open corner. W18 makes a double approach, leading to a typical joseki.

[Diagram]

Elf's mainline for B17, continued

Game continuation.

[Diagram]

B21 loses 15½%

B21 loses 15½% by comparison with a (30.4k playouts).

[Diagram]

Elf's mainline variation for B21

After B21 W22 pushes out with a kosumi, then B23 pincers the white+triangle stone in the bottom right. White presses from the outside and then W26 attacks the black+circle stone and Black pushes into the center.

[Diagram]

Elf's mainline continuation after W22

white+circle indicates W22 in the actual game. The rest is Elf's mainline variation. B23 jumps out into the center, then W24 makes a hanging connection. After B25 makes a table shape, White plays hane and connect with sente against the corner. Then White encloses the black+circle stone.

Game continuation.

[Diagram]

The cut, :b29, loses 11½%

W26 forces B27 to connect with bad shape. B29 loses 13½% by comparion with the fifth line push at a (61.9k playouts).

Elf's mainline variation for B29

[Diagram]

Elf's mainline for B29

B29 presses along the 5th line with sente and then B31 makes a one space jump from the black+circle stone, also with sente. B33 connects along the fifth line with sente, and later B37 makes a two space jump into the center.


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