(;
GM[1]
SZ[19]
AW[cd][ic][nc][nd][ne][ng][ph][li]
AB[ie][le][lc][oc][pd][pf][re][dp][pp]
TR[ic]
C[Problem 75. Black to play.  

How should Black attack the marked white stone at the top ? ]
;B[hc]
TE[2]
C[Correct Answer.  

Black's three stones are thin, so he should strengthen them by attacking the white stone at the top. ]
(;W[hb];B[hd];W[gb];B[ed];W[fc];B[fd];W[dc]
C[The sequence to 8 is the best both sides can hope for. ]
;B[df]
C[Finally, Black plays 9 and he has built a wall that will later be effective in attacking the six white stones in the top right. Next ... ]
;W[pn]
C[The game continued with White mapping out a moyo on the right side with 10 ... ]
;B[np];W[nn]
C[... and 12. ]
;B[lp];W[cn];B[dk];W[fq];B[dn];W[cq];B[co];W[dq];B[bn];W[bf]
C[After the joseki in the lower left corner, White slides to 22 to prevent Black from making territory on the left side. See Problem 130. <= ]
)
(;W[hd]
C[Variation.  

If White hanes on the outside with 2, ... ]
;B[id]
C[... Black cuts with 3. White's stones are too week to fight and ... ]
;W[gc];B[hb];W[ib];B[gb]
C[... her position collapses after Black 7. <= ]
)
(;W[id]
C[Variation.  

White might play 2 here ... ]
;B[hd];W[je]
C[... and 4, but ... ]
;B[jd]
C[... Black cuts with 5. ]
(;W[kd]
C[If White sacrifices two stones by playing 6 ... ]
;B[jc];W[kc]
C[... and 8, ... ]
;B[ib]
LB[kb:B][ke:A]
C[... Black captures with 9 and dominates the top. Next, the points A and B are miai. <= ]
)
(;W[hb]
LB[jd:5]
C[If Black cuts at 5, White can't hane at 6. ]
;B[ib];W[jc];B[jb];W[kd];B[kc];W[jd];B[jf];W[if];B[he];W[kf];B[jg];W[ke];B[kg]
C[Black squeezes with the sequence to 19, then ... ]
;W[lf];B[fc]
C[... settles his stones at the top by jumping to 21. <= ]
))
)