The value of two moves in a row

  Difficulty: Advanced   Keywords: Opening, MiddleGame, Strategy

There is a pro game with an unusual situation in which for some time white can play two moves in a row and can choose any time during the game to do it.

Game featured in an article "The Value Of Two Moves In A Row" by Matthew Macfadyen in the British Go Journal, number 90, 1993. It's "one of (his) favourite professional games". I (Malcolm) don't know if we can reproduce Macfadyen's comments, but the game itself should be OK.

The game is Okumura Yasushi (Black I think) vs Omori Yasushi, in the final of the Shodan section of the 1987 Kisei.

[Diagram]

Moves 1 to 10

[Diagram]

Moves 11 to 20

[Diagram]

Moves 21 to 30

[Diagram]

Moves 31 to 40

[Diagram]

Moves 41 to 50

[Diagram]

Moves 51 to 60

[Diagram]

Moves 61 to 70

[Diagram]

Moves 71 to 77

Black has killed the white stones, but has the threat of two moves in a row to deal with. White ends up resigning at move 252. For the complete game, the sgf is [ext] here.


Tasky: why did W never use his 2-moves-in-a-row-privilege? couldn't he have killed the black group in bottomright and doing so saved his group?

MrTenuki: My guess is that White's "2 moves in a row" actually refer to the mannen-ko in the corner-- namely, in the form of a ko threat and its follow-up.


This is a copy of the living page "The value of two moves in a row" at Sensei's Library.
(OC) 2014 the Authors, published under the OpenContent License V1.0.
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