EVENT
BOARDSIZE 19
SETUP W B16 C14 C11 J16 K17 M16 R14 Q10 
SETUP B C17 D16 F16 K16 J17 N15 O16 Q16 
MARK 5@J16 4@J17 3@K17 2@N15 1@M16
COM
Problem 58. Black to play.  

Black 2 gives White the chance to attach and cut with 3 and 5
on the left. With good play, however, Black can come out of this
position with an advantage. How should Black play ? 
ENDCOM
B 1 L17
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black should atari with 1 ...
ENDCOM
  VAR
  B 1 K18
  USER
  CORRECT ANSWER
  ENDUSER
  COM
  Correct Answer.

  Black could also play 1 ...
  ENDCOM
  W 2 L17
  B 3 H17
  COM
  ... and 3.
  ENDCOM
  W 4 K15
  B 5 H16
  W 6 J15
  B 7 L18
  W 8 M18
  B 9 N17
  W 10 M17
  B 11 H15
  COM
  After 11, White's group is still not alive , so Black can make
  further gains by attacking it.
  <=
  ENDCOM
  ENDVAR
W 2 K18
B 3 H17
COM
... and extend to 3.
ENDCOM
W 4 L16
COM
After 4, ...
ENDCOM
B 5 K15
W 6 M17
B 7 L14
COM
... Black confines White to the side with 7.
ENDCOM
  VAR
  B 7 J18
  MARK @@L14
  COM
  Instead of 7 at @, Black could play here.
  ENDCOM
  W 8 L18
  B 9 N18
  COM
  <=
  ENDCOM
  ENDVAR
W 8 O18
COM
White lives with 8.
<=
ENDCOM