Beginner Exercise 21 / Solution

Sub-page of BeginnerExercise21

KarlKnechtel:

[Diagram]

White escapes!

Black is caught in a connect-and-die. If Black a, White b captures. Otherwise, White captures at a, and is connected to the outside and escapes, thus living (by tsumego convention).

[Diagram]

White failure

The double atari is wrong here: Black chooses which group to sacrifice, preventing White from connecting and escaping. Note the the bottom row of four is good for at most one eye. After White captures (perforce: if White tries to start making an eye below, Black will capture and White only gets one eye), Black reduces that to no eyes with the double hane:

[Diagram]

White failure (con't)

This shows that White has only the one eye.


[Diagram]

White failure (con't)


Wauske: If white were to play 5 wouldn't it mean that, if used correctly, it would live? Meaning that black can respond at a or b white would respond at the other and that c would be followed up by d?

[Diagram]

White failure (con't)

unkx80: Are you saying that B6 may be answered by W7? Then B8 can capture the W7 stone.

(Note: B8 is not neccessary.)

[Diagram]

White failure (con't)

This is the end result. Is White alive, i.e. does White have two eyes?


See also:



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