(;
GM[1]
SZ[19]
AW[dg][fj][cn][dn][fo]
AB[jp][jd][pj][dj][dp][pd][pp][dd][jj][fc][dm][em][fp]
LB[fc:4][dg:3][fj:5][cn:1][fp:2][fo:9][dn:7][dm:6][em:8]
C[Problem 28. Black to play.  

Black 6 and 8 are strong counters to the cap of White 5. But how should Black answer to White 9 ? ]
(;B[en]
TE[2]
C[Correct Answer.  

Cutting through with Black 1 ... ]
;W[eo];B[do]
C[... and 3 is severe. ]
;W[ep];B[eq];W[fq]
LB[dq:B][go:A]
C[Because of the ladder at A, White can't cut at B. ]
;B[dq];W[gp];B[cm]
C[Black gets a lot of profit in the corner with the sequence to 9. <= ]
)
(;B[fn]
C[How the game continued.  

Black clamped with 1, hoping to link up with his stones below. ]
;W[eo]
C[But White's stones were quite flexible ... ]
;B[gp];W[go];B[cp];W[ep];B[eq];W[hp];B[hq];W[fl]
C[... Black's stones on the left side became a liability after White 10. This was a success for White. See Problem 36 for the continuation. <= ]
)
)