(;
GM[1]
SZ[19]
AW[fc][fd][jc][qd][qe][pf][of]
AB[dd][ec][df][mc][pd][pe][qc][rc][qf][qj]
LB[qf:3][pf:2][pe:1]
TR[of]
C[Problem 127. White to play.  

After White plays the marked stone, Black pushes down and cuts with 1 and 3. What should White do ? ]
;W[qg]
TE[2]
C[Correct Answer.  

White should atari with 1, ... ]
;B[rf];W[od]
C[... then attach at 3. ]
(;B[pc];W[rg];B[re]
C[After Black 6, ... ]
;W[oh]
C[... White makes shape with 7. <= ]
)
(;B[re]
LB[od:3]
C[Failure.  

If Black ignores White 3 and immediately goes after the two white stones with 4, ... ]
;W[oe];B[pc];W[oc]
LB[od:5]
C[... White plays 5 and 7, isolating the black stone at the top. <= ]
)
)