EVENT
BOARDSIZE 19
SETUP W D16 C15 B15 D14 E14 C13 C12 B5 C5 D4 F4 O3 L3 Q2 R18 R17 Q18 Q16 Q15 K16 
SETUP B C17 D17 F17 C14 B14 B13 B12 C10 D12 D13 B6 C6 E6 R3 Q4 Q6 R11 Q17 P17 R16 
COM
Problem 112. Black to play.  

How can Black take the initiative at the top ? 
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B 1 G14
USER
CORRECT ANSWER
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COM
Correct Answer.

The sequence ...
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W 2 E16
B 3 G18
W 4 E12
B 5 F15
COM
... to Black 5 severely attacks the white stones in the upper
left.
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W 6 G12
COM
After White escapes to 6 ...
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B 7 N16
COM
... Black jumps to 7, forcing ...
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W 8 R14
MARK A@R15
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... White to defend at 8 (Black is threatening to play A). Next,
...
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B 9 L15
COM
... Black attacks the lone white stone at the top with 9.
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W 10 J12
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White now needs to defend her stones in the center with 10.
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  VAR
  W 10 J14
  COM
  Variation.

  If White runs away by jumping to 10 here, ...
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  B 11 H13
  COM
  ... Black keeps the white stones on the left separated from its
  allies at the top with 11.
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  W 12 L14
  B 13 M14
  W 14 L13
  B 15 K15
  W 16 J15
  B 17 L16
  W 18 K17
  B 19 M13
  W 20 L12
  B 21 N11
  MARK A@K14
  COM
  After Black 21, White's stones on the left and at the top are
  under attack. The defect in White's shape at A will be a burden.
  <=
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  ENDVAR
B 11 H11
COM
After exchanging 11 ...
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W 12 H12
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... for 12, ...
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B 13 J14
COM
... Black secures the top with 13.
<=
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