(;
GM[1]
SZ[19]
AW[fc][cn][dm][co][cj]
AB[dp][pd][pp][dd][cf][dn][en][cp]
LB[fc:1][cf:2][cn:3][dn:4][dm:5][en:6][co:7][cp:8][cj:9]
C[Problem 101. Black to play.  

White extended to 9. Where should Black play next ? ]
(;B[jq]
TE[2]
C[Correct Answer.  

Black should take the big point at the bottom by extending to 1. ]
(;W[do]
C[You might be afraid of White cutting through with 2 ... ]
;B[eo];W[ep]
C[... and 4, ... ]
;B[bp];W[cm];B[fp];W[eq];B[fq];W[dr];B[fr];W[br];B[dq]
C[... but when Black plays 13 ... ]
;W[er];B[cr]
C[... and 15, White's stones in the corner are dead. <= ]
)
(;W[db]
LB[do:@]
C[Instead of @, White might play ... ]
;B[cc];W[ic]
C[... the sequence to 4 at the top. ]
;B[qj]
C[Black would then take another big point on the right side around 5. <= ]
))
(;B[db]
C[How the game continued.  

Black enclosed the corner with 1, but ... ]
;W[nq]
C[... this let White take the initiative in the lower right with the approach moves of 2 ... ]
(;B[jq];W[qn]
C[... and 4. ]
;B[pn]
C[Next, Black should attach at 5. <= ]
)
(;B[pn]
C[Black should not play at 3 here, ... ]
;W[jq]
C[... because White would take the point 4 and neutralise Black's influence on the left. Don't be afraid of double approaches against your handicap stone. If you are, it will be easy for White to gain the advantage. <= ]
))
)