(;
GM[1]
SZ[19]
AW[dc][de][hc][he][cj][qc][qd][re][sf][qf][pf][og][rg]
AB[jc][je][pc][pd][pe][qe][rd][rc][of][ng]
LB[ng:3][og:2][of:1]
C[Problem 92. White to play.  

Black 3 is an overplay. How does White take advantage of it ? ]
;W[qb]
TE[2]
C[Correct Answer.  

White should descend to 1. ]
(;B[pb]
C[If Black 2, ... ]
;W[rb]
C[... White will play 3, capturing two stones in the corner. <= ]
)
(;B[rb]
C[Failure.  

If Black saves his corner with 2, ... ]
;W[pb]
C[... White turns at 3. ]
;B[ob]
C[After 4, ... ]
;W[oe]
LB[oc:B][nf:A]
C[... White ataris at 5, threatening to capture one stone at A or four stones at B. <= ]
)
)