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MiaiValue

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Sente
BasicEndgameTheory
ValueOfAMonkeyJump
DeiriCounting
SenteGote
TedomariSolution
Chilling
AmbiguousPosition
BasicKofightExample
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Miai Counting
    Keywords: EndGame

Miai Counting is a method to assess the value of a move.

[Diagram]
Diag.: Example diagram

Miai counting assigns a count to the position, and a value to a play in the position. In this example, the count is 2 (Black has 2 points more than White) and the miai value is 1 (Black's hane-connect shifts the count to 3, while White's shifts it to 1).

An example of miai counting is given in Value of a Monkey Jump.

Comment: You can compare miai values directly. In general, you make the play with the largest miai value. Also, miai values add and subtract like ordinary numbers. Neither is true of deiri values. -- Bill Spight



Question: Do miai values take sente/gote into account?

Answer Bill Spight: Yes. You do not have to make any alterations to compare the sizes of sente and gote plays using miai values.

The example is not a full board, but part of a board. The stones framing the example are alive. That is a convention started in Mathematical Go, by Berlekamp and Wolfe.


[Diagram]
Diag.: Clearly living

By placing two extra black and white stones, the example is clearly living, though this is unnecessary by the assumptions of yose problems. Black a and White b make the neutral position from which the differential counts can be compared


[Diagram]
Diag.: White -1

Black moving first costs White one point of territory and is minus one for White.


[Diagram]
Diag.: Black -1

White moving first costs Black one point of territory and is minus one for Black.



The Japanese amateur Sakauchi Jun'ei is credited with some of the development of miai counting.



This is a copy of the living page "Miai Counting" at Sensei's Library.
(C) the Authors, published under the OpenContent License V1.0.