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MostDifficultProb...

 

MostDifficultProblemEver/Solution1
Sub-page of MostDifficultProblemEver

[Diagram]
solution (1)

First moves are reasonably easy (white W9 at W7)


[Diagram]
solution (2)

Next, the ko under the stones (W6 is the first incredible move; W8 takes back the ko at W2)


[Diagram]
solution (3)

It is a two-stage ko, so the fight spread to the edge... (B5 takes back W2); W8 is an inner ko threat


[Diagram]
solution (4)

B4 takes back W1, W7 takes back. Is Black out at last?


[Diagram]
solution (5)

W5 is the last important twist : if played one point left, Black can escape


[Diagram]
solution (6)

All those antics won't save Black now


[Diagram]
solution (7)

Moves B4, W5 and W7 under the black stones (this is a two stones edge squeeze)


[Diagram]
solution (8)

A fitting conclusion



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(OC) 2004 the Authors, published under the OpenContent License V1.0.