EVENT
BOARDSIZE 19
SETUP W C17 D3 S2 R2 R3 R6 P5 P4 P3 Q4 
SETUP B S3 R4 R5 Q5 Q6 P6 R8 O5 Q3 R16 P17 
MARK A@K17 B@C10 C@C5
COM
Problem 114. White to play.  

In the joseki played in the lower right, White ended in sente.
Of the three moves indicated, which one would you choose for
White ? 
ENDCOM
W 1 K17
USER
CORRECT ANSWER
ENDUSER
COM
Correct Answer.

Extending to 1 at the top is the right direction for White to
play. This move will make it hard for Black to complete his moyo
on the right side.
<=
ENDCOM
  VAR
  W 1 C5
  COM
  Failure.

  Making a corner enclosure with 1 on the left is not good.
  ENDCOM
  B 2 J16
  COM
  Black will be able to expand the scale of his moyo with 2, giving
  him the advantage.
  <=
  ENDCOM
  ENDVAR