(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00] PW[White]PB[Black]AW[pb][qb][nc][qc][dd][ne][qe][re][jm][cn][jn][rn][io][ro][dp][qp][qq][pr][qr]AB[ob][oc][pc][pd][le][nf][pf][pj][qm][qn][fo][jo][qo][jp][pp][fq][nq][pq][or]LB[hm:A][im:D][hn:B][in:E][ho:C]TR[jm][jn][io]C[how can black best attack the shape of the marked white stones?]PL[B] (;B[hm]CR[hm] ;W[hn]CR[hn]C[though this is often the key point, here white gets good shape]) (;B[hn]CR[hn] ;W[in]CR[in]C[good start. how to complete the shape?] (;B[hm]CR[hm]C[RIGHT the white stones are heavy]) (;B[ip]CR[ip] ;W[hm]CR[hm]C[white gets good shape]) (;B[hp]CR[hp]C[weak]) (;B[ho]CR[ho] ;W[ip]CR[ip]C[this helps white do what he wants to do anyway])) (;B[ho]CR[ho] ;W[in]CR[in]C[not bad, but white's shape is better than it could be]) (;B[im]CR[im] ;W[in]CR[in]C[no way jose]) (;B[in]CR[in] ;W[hn]CR[hn]C[black captured in a ladder. terrible for black.]))