(;
GM[1]
SZ[19]
AW[dc][de][cj][hc][he][qc][qd][re]
AB[jc][je][pc][pd][qe][rf][pj]
LB[rf:3][re:2][qe:1]
C[Problem 86. White to play.  

Black aggressively blocks with 3. How should White respond ? ]
(;W[qf]
TE[2]
C[Correct Answer.  

White should atari with 1 ... ]
;B[pe];W[rg]
C[... and 3. This is the same as the Failure Diagram in Problem 83. <= ]
(;B[rd];W[sf];B[rc]
LB[rd:4]
C[Black captures two stones with 4 and 6. <= ]
)
(;B[pf]
C[Black could also atari at 4. Either way, White will have no problems. <= ]
))
(;W[pb]
TE[2]
C[Correct Answer.  

White could also play 1 here, but this is a difficult variation. <= ]
)
)