EVENT
BOARDSIZE 19
SETUP W D17 E17 C16 C14 C13 R17 P17 S15 R4 Q3 O4 S6 R6 Q6 P6 P7 N6 N7 N8 O8 M9 M10 L8 Q8 
SETUP B D13 D14 D12 E16 F17 G16 N17 O15 Q15 E4 K4 Q5 R5 O7 M8 M7 L7 N9 O9 P9 P8 Q9 R9 Q7 R7 S7 
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Problem 83. White to play.  

That is the position reached in the game of Problem 73. How should
White attack the three black stones ? 
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W 1 K7
USER
CORRECT ANSWER
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COM
Correct Answer.

White should play a two-step hane with 1.
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  VAR
  W 1 K10
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  Failure.

  White 1 is a slack move.
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  B 2 K8
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  Black gets a good position at the bottom with 2.
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  W 3 L12
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  White jumps to 3, ...
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  B 4 L14
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  ... but Black answers with 4, mapping out territory at the top.
  White is under attack.
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  W 5 O12
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  She expands to the right, but ...
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  B 6 Q12
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  ... Black defends and takes more territory there. White's stones
  are still vulnerable, so Black can look forward to an interesting
  game.
  <=
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  ENDVAR
B 2 K8
W 3 L9
B 4 K6
W 5 J7
B 6 L5
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After the sequence to Black 7, ...
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W 7 J9
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... White secures her stones in the center with 7. These stones
aim at the bottom and the top. White is now ahead, so she doesn't
have to do anything drastic.
<=
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