Spot the Atari / Solutions

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Spot the Atari! solutions

 Table of contentsSpot the Atari! solutions Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Exercise 7 Exercise 8 Exercise 9 Exercise 10

Exercise 1

Exercise 2

Exercise 3

Exercise 4

Exercise 5

Exercise 5

Remark: Stronger players will note that White can also play elsewhere, since the Black stones are already dead.

Exercise 6
Exercise 6
Exercise 6

Exercise 7

Exercise 7
Exercise 7
Exercise 7

is not the best way to capture. can capture a white stone and save four black stones.

Exercise 8
Exercise 8
Exercise 8

Exercise 9

Exercise 9
Exercise 9

For this problem, black a or black b can be considered to be a solution.

Exercise 9

in this diagram is a failure. The result is a snapback, at will capture black.

Exercise 10

Exercise 10
Exercise 10
Exercise 10

Remark: For the purpose of this exercise, here may be considered to be a solution. But it is inferior to the previous solution of capturing the three outside Black stones.

Exercise 10

Notice now that white has made her group alive, and black cannot cut the marked stones. Also White has captured three more stones and lost one. White may make one additional point of territory with , but this also does not represent optimal play. Let's review why.

With , White forces Black to connect at captured . White can then play at A to force Black to connect at B, then create a tiger's mouth at C. White can meet the Black extension at D with E, forming another tiger's mouth; but Black could produce Atari by a play to the right of E, forcing White to close at F. Black could then play the diagonal and attempt to escape White's thickness; with friendly stones nearby, Black can succeed. Without, future play may make the position more favorable to Black.

Exercise 10

In this sequence, White has forced with . White then creates atari with , forcing Black to connect at . White can now play at A; B becomes a net by the marked point, and C becomes a tiger's mouth. Black can Tenuki or try to reduce White's territory by 1 point; Black tenuki gains the opportunity to threaten to cut White as a Ko threat, so White should connect when possible. White should give priority to extending influence out towards the center, if possible, using the White group to the right.

Spot the Atari / Solutions last edited by 176.145.10.149 on March 15, 2016 - 19:09
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