Beginner Exercise 130 / Solution

Sub-page of BeginnerExercise130

Solution 1

[Diagram]
Solution 1.  

This is the most direct solution. W1 and W3 reduces black's liberties and forces B2 and B4 to capture the four white stones.

[Diagram]
Solution 1.  

Although black wins the capturing race, the resultant eye shape is a farmer's hat, which is killed by W5.



Solution 2

[Diagram]
Solution 2.  

W1 is yet another solution. After W3, if black plays at a, black puts himself into self-atari. (It is also possible to reverse the order of W1 and W3 to kill, but B2 will be postponed in practice).

[Diagram]
Solution 2.  

After B4, W5 directly occupies the vital point. Even when B6 desperately tries to create the second eye, W7 is an atari on four black stones including B6. Now if black connects at a, then he dies in gote.

Comparison: The marked stone may have some good effect to the right. On the other hand, this line gives Black an additional ko threat.



Additional Remark

[Diagram]
Remark.  

If black+circle was a black stone, then in Solution 2, it is not possible for white to play W7 at a.

[Diagram]
Remark.  

However, W5 directly kills. B6 and W7 are now miai. In the end, whether black+circle is a white stone or a black stone, we still have at least two solutions.



Beginner Exercise 130 / Solution last edited by hnishy on September 10, 2024 - 03:49
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