(;
GM[1]
SZ[19]
AW[dd][fc][qf][pi][ej][gj][ck][dm][dn][cp][dq][cr][lo][ln][qo][mp][mq][lq][mr][fq][hq][gp][gq][gr][iq][ip]
AB[jd][pd][rf][re][dr][eq][fr][ep][fp][em][el][go][ho][hp][io][ko][kp][lp][mo][no][np][po][pm][qp][pq]
TR[pi][qf]
C[Problem 79. Black to play.  

How should Black attack the marked white stones ? ]
(;B[ni]
TE[2]
C[Correct Answer.  

Capping with Black 1 is best. ]
(;W[qk]
C[If White defends with 2, ... ]
;B[og]
C[... Black plays 3 and a moyo begins to appear at the top. <= ]
)
(;W[og]
C[If White 2 here, ... ]
;B[qk]
C[... Black plays 3 here and White's stones will come under attack. <= ]
))
(;B[qg]
C[Failure.  

Black 1 has no strategic significance. ]
;W[pg];B[qh];W[ni]
C[White lightly jumps to 4 and Black no longer has an attack. <= ]
)
)