Spot the Atari

  Difficulty: Introductory   Keywords: Tactics, Problem

Spot the Atari!

Here are some exercises for entry-level players to learn how to see which stones are in atari, i.e. with only one liberty remaining. When stones are in atari, they can be captured at the next move.

Table of contents


Example

[Diagram]

Example

Here is an example exercise.

[Diagram]

Example

This is the solution to the example exercise. Notice that the white+circle stone is under atari and B1 can capture it.


For Exercises 1 to 5, some stones of one colour will be under atari, and there is exactly one point where a capture can be made. Your task is to find the stones under atari, and spot the point that captures these stones.

The link to the solutions can be found at the bottom of this page.

Exercise 1

[Diagram]

Exercise 1



Exercise 2

[Diagram]

Exercise 2



Exercise 3

[Diagram]

Exercise 3



Exercise 4

[Diagram]

Exercise 4



Exercise 5

% ambiguous exercise, should be replaced
% unkx80: I wanted an exercise that shows that a capture can be made at a point that looks like suicide, but no good problem can be made that fits the requirement of "exactly one point where a capture can be made". Some of the later exercises actually build upon this idea.
[Diagram]

Exercise 5


For Exercises 6 to 10, one or more groups from either colour may be under atari. For each colour, determine the best point for capturing stones from the opposite colour, if such a point exists.

The link to the solutions can be found at the bottom of this page.

Exercise 6

[Diagram]

Exercise 6



Exercise 7

[Diagram]

Exercise 7



Exercise 8

[Diagram]

Exercise 8



Exercise 9

[Diagram]

Exercise 9



Exercise 10

[Diagram]

Exercise 10


Solutions

Here are the solutions to the exercises.


This is a copy of the living page "Spot the Atari" at Sensei's Library.
(OC) 2009 the Authors, published under the OpenContent License V1.0.
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