(;
GM[1]
SZ[19]
AW[fc][fd][jc][qd][rd][re]
AB[dd][ec][df][mc][pd][qc][rc][qe][qj]
LB[rd:2][rc:3][qc:1]
TR[re]
C[Problem 142. White to play.  

Black takes the corner with 1 and 3. What should White do ? ]
;W[pe]
TE[2]
C[Correct Answer.  

White should cut with 1, ... ]
;B[qf];W[pc]
C[... then atari with 3. ]
;B[od];W[rf]
(;B[oc]
C[After Black takes the corner with 6, ... ]
;W[qg];B[pf];W[og]
LB[qg:7]
C[... White makes sabaki with 7 and 9. <= ]
)
(;B[qg]
C[Variation.  

Black extends to 6, aiming to get thickness in the center. ]
;W[pb]
C[However, White takes the corner with 7. <= ]
)
)