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Big Question Mark Problem 8
Keywords: Life & Death
Killing Sequence 1 (The Easy One)
Looks are very deceiving... It looks as if black is unconditionally alive. However, the hane at 1 and 3 kills unconditionally.
Notice that black can't play at 5 at 6.
Killing Sequence 2 (The Harder One)
The placement at white 3 works, too. The aji caused by the marked stone becomes apparent and black is now unconditionally dead.
If black connects at 1, white can play the hane at 2 to kill. After black 3 and white 4, black can't play at a because of damezumari. So if he captures the two stones, White kills him at a.
Playing white 2 in the previous diagram at 1 here is wrong. Black sagaris at 2, and then makes a seki with 4.
Black 1 tries to expand the eye space, but with the ataris at 2 and 4...
...white continues his atari sequence, and occupies the vital point of 4. Black dies of a bulky five shape.
Connecting at 1, and white responds with 2. Then 3 and 4 are also miai.
Capturing a white stone at 1 is also useless. White can cut at 2, black 3, and white 4, and black is again given the death sentence. If black 3 plays at 4, and white can atari at 3, reverting to Variation 1.
Maybe this variation is not needed? In response to black 1, white cuts at 2 and ataris at 4, capturing the three marked stones. Other Variations
We shall now consider black's other answers to the hane (the marked stone). Black 1 is a possible move, but white 2 reduces black to a bulky five. If black plays 3, white plays at 4 and a and b are miai. Well, white 4 must never play at a, or else black ataris three stones at c, white d, and black 4 makes two eyes.
If black plays 1, white makes a placement at 2 and black suffers the fate of a bulky five.
This way of resistance is also useless. Perhaps the other variations are unnecessary? This page was WikiMasterEdited by unkx80. The old page can be found here. Contributors: This is a copy of the living page "Big Question Mark Problem 8" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |