(;
GM[1]
SZ[19]
AW[cd][ed][hc][ch][qf][pf][qi][qc]
AB[jc][cj][nd][pd][qe][rd]
LB[rd:2][qc:1]
C[Problem 137. White to play.  

This time Black responds with the diagonal move of 2. What should White do in this case ? ]
(;W[ob]
TE[2]
C[Correct Answer.  

In this case, the knight move of White 1 is the only way. This move was criticised in Problem 125, but in this case it is good. <= ]
)
(;W[oc]
C[Failure.  

If White plays 1 ... ]
;B[od];W[nb]
C[... and 3, ... ]
;B[pc];W[pb];B[nc];W[ob];B[rb]
C[... the sequence continues up to 8. ]
(;W[qb]
C[If White connects at 9, ... ]
;B[rf]
C[... Black plays 10. <= ]
)
(;W[lc]
C[If White 9 here, ... ]
;B[qb]
C[... Black takes the corner with 10. Either way, Black ends up with a thick position. <= ]
))
)