Keywords: Theory

Chinese: 手割 (shou3 ge1)
Japanese: 手割り (tewari)
Korean: 수나누기 (su nanugi)

Tewari is a heuristic to see whether stones are working well together. The method is believed to have been developed in Japan in the late 1600s.

There are two approaches to the concept of tewari. Either way, tewari analysis should be done after the local situation settled.

  1. Take away an equal number of (superfluous) stones of both colors from a position. Then evaluate whether the remaining stones are working efficiently, in order to decide which side made the better moves.
  2. Invert or permute the order of moves, also called transposition, to see whether one would still have responded so that the actual position results. If this is not the case, that tells something about the previous moves.

For limitations see how to lie with tewari.

Sorin Gherman has written an [ext] article about tewari at this site: 361 Points.[1]


More examples in forum postings:

[1] fractic: This example looks a lot like lying with tewari.

Tewari last edited by on June 11, 2023 - 11:34
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