(;
GM[1]
SZ[19]
AW[cd][ed][hc][ch][qf][pf][qi][qc]
AB[jc][cj][nd][pd][qd][qe]
LB[qd:2][qc:1]
C[Problem 138. White to play.  

How does White respond to Black 2 ? ]
(;W[pb]
TE[2]
C[Correct Answer.  

The diagonal move of 1 gives White good shape. ]
;B[pc]
C[If Black 2, ... ]
;W[rb]
C[... White plays 3, easily making life in the corner. <= ]
)
(;W[pc]
C[Failure.  

White 1 is a bad move. ]
;B[oc]
C[Black plays 2 and gets a solid shape. ]
;W[rd]
C[After this, White must play 3, ... ]
;B[re];W[rb];B[sd];W[sc]
C[... and she can only live in the corner by winning a ko. <= ]
)
)