(;
GM[1]
SZ[19]
AW[de][dc][hc][he][cj][qc][qd][qe][rf][qg][rh]
AB[jc][je][pc][pd][pe][qb][rg][qf][pf][pj]
LB[qb:1][re:B][rb:A]
C[Problem 101. White to play.  

After White 3 in the Correct Answer of Problem 98, Black 1 is the vital point. If White blocks at A, Black will atari at B. What should White do ? ]
(;W[sg]
TE[2]
C[Correct Answer.  

Capturing with 1 leaves White with good aji. ]
;B[rc];W[rd];B[sd]
LB[rc:2]
C[Black gets to play forcing moves with 2 and 4, ... ]
;W[re]
C[... but that cannot be helped. <= ]
)
(;W[rd]
C[Failure.  

White could also respond with 1, ... ]
;B[pg]
C[... but Black ataris with 2. Black is putting all his stones to good use. <= ]
)
)