Authors:
Main line: Hashimoto Utaro 9p
Variations: unkx80, Dieter Verhofstadt 1k
White is tesuji.
Later, if , then
captures the
stone and lives.
Leaving out the hane enables Black to play hane himself. The most White can get out of it is to starting a (terribly disadvantageous) ko at a.
The throw-in at and the atari at
will throw the entire black group into a ko.
If White connects the ko at , the atari at
blows the eyeshape away. If White doesn't, a black capture at
continues the ko.
White here doesn't threaten anything, giving Black the time to make an eye false at
.
Go to Problem 18
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