# Forum for Hane tsugi

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# three stones -> ko? [#1268]

xela: three stones -> ko? (2008-01-26 00:33) [#4223]

Looking at this diagram and comment:

Three stones (5 at 2)

With three stones, there are some problems. An attempt by white to hane-tsugi may be met by a throw-in (a liberty stealing tesuji) where white expects to play . The ko that results if white does not connect with does not help white. Therefore at is often correct (a case of One-Two-Three).

I don't understand the remark "the ko... does not help white". It looks to me like black has a lot to lose in such a ko, so it's a picnic for white. Instead, black can play at a, then white can't play at , right?

MrTenuki: ((no subject)) (2008-01-26 13:53) [#4224]

Here's my 3k guess:

I assume that this is your reasoning? (" and get captured because white cannot play at . In fact, at a is gote.")

But...

What happens if = tenuki? Well, Black can certainly play at b, and white can tenuki again. But compare this with the following diagram:

This seems slightly better than the result above... although I can't give an exact number in miai counting terms (Bill Spight, are you there? ;-) If is played elsewhere, white can play at for an even bigger reduction.