BQM 8
Problem
Killing Sequence 1 (The Easy One)
Looks are very deceptive... It looks as if Black is alive. However, the hane at , and
, kill unconditionally.
Killing Sequence 2 (The Harder One)
The placement at works, too. The aji caused by
becomes apparent and Black is now unconditionally dead.
If Black connects at , White can play the hane at
to kill. After
and
, Black can't play at a because of shortage of liberties. So if he captures the two stones, White kills him at a.
...White continues his atari sequence, and occupies the vital point of . Black dies with a bulky five shape.
Capturing the white stone at is also useless. White can cut at
,
, and
: and Black is again given the death sentence. If
plays at
, and White can play atari at
, reverting to Variation 1.
Maybe this variation is not needed? In response to , White cuts at
and plays atari at
, capturing the
stones.
Other Variations
We shall now consider Black's other answers to the hane (the marked stone). is a possible move, but
reduces Black to a bulky five. If Black plays
, White plays at
; and a and b are miai.
Well, must never be played at a, or else Black plays atari on three stones at c, White d, and
makes two eyes.
See also: