Beginner Exercise 85 / Solution

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The toughest resistance from Black  

B2 must be answered by W3 - and certainly not W4 or W5. One suffers from shortage of liberties, and the other lets Black kill at W3.


If B2 here, W3 is the only play that secures life.

Failure 1  

W1 looks like making two eyes, but due to the descent at black+circle, Black can play B2. Now White can only live by a ko at W3.

Note that W3 at a is wrong - see below.

Failure 2  

If W1 here, then B2 hits the critical spot, and White is dead.

Double ko death  

If White throws in with W1, B2 takes one of the kos. Now if White plays at a or b, Black fills with black+circle, holding White to one eye.

Double ko death (ii)  

If White later takes the ko back with W5, B6 takes the other ko. Now if white+square, black+circle kills.

Another solution?  

Wind: Does this work?


Superdave: No.

lavalyn, Dansc, Bill Spight, unkx80.

Beginner Exercise 85 / Solution last edited by on December 23, 2015 - 06:11
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