(;GM[1]
FF[4]
AP[Hibiscus:2.1]
SZ[19]
ST[3]
;C[Black to play the best extension.]
PL[B]
LB[yy:1][jq:A][kq:B][lq:C][mq:D][jp:E][kp:F][lp:G][mp:H]AB[pq][qo]
AW[dp][hn][ho][hp][hq]
(;B[mq]
C[RIGHT
This is a solid move that denies white
any severe attack on any of the black
stones.]
MN[1]
)(;B[lq]
LB[lq:1][nq:A]C[This is too close to the white
thickness. If white invades at A,
black 1 will have trouble connecting to
the black corner.]
)(;B[kq]
C[This is too close to the white
thickness. If white invades at A,
black 1 will come under a severe
attack.]
LB[kq:1][mq:A])(;B[jq]
C[This is too close to the white
thickness. If white invades around A,
black 1 will come under a severe
attack.]
LB[jq:1][mq:A])(;B[mp]
LB[mp:1][mr:A]C[White has a nice move at A.]
)(;B[lp]
C[White has a nice move at A or he
might cause some trouble by attaching
at B. Black played too loose.]
LB[lp:1][lr:A][oq:B])(;B[kp]
C[This is too close to the white
thickness. If white invades at A, black
1 will come under a severe attack.]
LB[kp:1][mp:A])(;B[jp]
C[This is too close to the white
thickness. If white invades around A,
black 1 will come under a severe
attack.]
LB[jp:1][mp:A][mq:A]))