Beginner Exercise 235 / Solution

Sub-page of BeginnerExercise235
black lives  

zinger If black goes first, he obviously lives, so the question is what happens if white starts. If W1, B2 makes a and b miai, so black lives.


So that only leaves W1. Black lives in seki up to B6. So it seems black is alive.

ProtoDeuteric: B4 and W5 are also miai. If they were switched, B6 would connect black at the top insead of the bottom.

White kills  

Bill: If White plays first, you cannot assume that White will get one and Black the other, since White kills. (W2 would also kill.)

But as ProtoDeuteric points out, if Black plays first, if he plays B1 White will play W2, and vice versa, for sente seki.

White kills  

ProtoDeuteric: Notice that W1 means death for black even if we disregard the "false miai" set up by the previous sequences. B2 at "c" produces W3 at "a", B2 at "b" forces black into a classically dead shape without white needing to respond, and B2 at "d" only serves to physically connect two parts of a dead group, as does a black play at "a". The problems for black with this eye space is that the internal white stones occupy the vital points for the potential shapes of the eye. Perhaps white does not need to respond to any black moves in this situation until white is captured, in which case she would need to play on the bending point of the bent three to kill black.

Beginner Exercise 235 / Solution last edited by Unkx80 on July 8, 2008 - 10:53
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