(;GM[1] FF[4] AP[Hibiscus:2.1] SZ[19] ST[3] ;C[Black played A, how to answer?] PL[W] LB[yy:0][oh:A]AB[bd][be][bf][bh][cb][ce][cg][cl][cm][cq][dg][dh][dp][eh][ep][fd][fe][gb][gc][ge][gf][gg][jb][kc][kd][oc][od][oh][pd][pi][qc][qd][qj][rb][rc] AW[bb][bc][bi][cd][cf][ch][ci][ck][cp][dc][de][df][di][dl][ed][ef][fb][fc][ff][jq][ka][kb][lc][mc][ob][og][pb][pc][pq][qb][qh][qo][ra] (;W[pf] MN[1] (;B[ng] ;W[nf] ;B[mf] (;W[mg] ;B[nh] ;W[me] ;B[lf] ;W[ne] ;B[pg] (;W[of] ;B[qg] ;W[qf] ;B[rg] (;W[re] C[RIGHT] )(;W[rf] C[Please see the next problem for why this is wrong.] ))(;W[qf] ;B[of] ;W[oe] ;B[pe] C[This ko will be a lot of trouble for white.] ))(;W[ph] ;B[nh] ;W[ne] ;B[me] ;W[nd] ;B[rf] C[Black can't be killed because of the weakness at A.] LB[rf:11][nc:A]))(;B[pg] ;W[ph] ;B[ng] ;W[of] (;B[nf] ;W[re] C[Black needs 2 moves on the outside so he's in trouble.] )(;B[nh] ;W[nf] C[This fight will be too much for black.] )))(;W[pg] ;B[ng] ;W[nf] ;B[of] ;W[oe] ;B[ne] ;W[pf] ;B[mf] C[White is in trouble as he can't play the ko.] )(;W[ph] (;B[ng] ;W[nh] ;B[oi] ;W[nf] ;B[mg] ;W[pf] ;B[mf] ;W[ne] ;B[me] ;W[nd] ;B[rf] C[Black can't be killed because of the weakness at A.] LB[rf:13][nc:A])(;B[pg] ;W[pf] ;B[ng] ;W[of] (;B[nf] ;W[re] C[Black needs 2 moves on the outside so he's in trouble.] )(;B[nh] ;W[nf] C[This fight will be too much for black.] )))(;W[ng] ;B[pg] ;W[pf] ;B[qf] C[White can't do anything.] )(;W[nf] ;B[pg] ;W[pf] ;B[qf] ;W[qg] ;B[ph] ;W[qe] ;B[rf] ;W[re] ;B[pe] ;W[of] ;B[se] )(;W[of] ;B[qf] ;W[pg] C[Bad shape for white.] ))