EVENT
BOARDSIZE 19
SETUP W D17 F17 C16 C15 D4 
SETUP B D15 D14 C14 Q16 Q4 
MARK 4@D4 1@Q16 3@Q4 2@D17 5@D15 6@C15 7@C14 8@C16 9@D14 10@F17
COM
Problem 5. Black to play.  

After the sequence to White 8, 9 is the usual way for Black to
play. After White settles her position at the top with 10, where
should Black play ? 
ENDCOM
B 1 D10
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Black should play the high extension at 1.
ENDCOM
W 2 R10
COM
If White plays 2 on the right side, ...
ENDCOM
  VAR
  W 2 C8
  COM
  Variation.

  White could also strike at Black's weak underbelly by extending
  to 2. Although this seems to be a severe move, Black has adequate
  countermeasures.
  <=
  ENDCOM
  ENDVAR
B 3 C6
COM
... the approach move at 3 gives Black an ideal position on the
left side.
<=
ENDCOM