(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[13]KM[0.50]PW[White]PB[Black]C[I didn't get much sleep, If I made a mistake in reading, please tell me:S](;AW[ek][gk][hk][ik][el][jl][fm][jm]AB[dj][ej][fj][gj][ij][jj][kj][kk][cl][dl][kl][em][km](;B[il];W[hl];B[fl];W[fk];B[gm])(;B[hm]C[seems wrong];W[fk];B[jk];W[il];B[gl];W[dm]))(;AW[dk][fk][gk][hk][bl][cl][hl][im]AB[bh][ci][gi][bj][dj][ej][fj][ij][jj][ak][bk][al][il][jl][am];B[cm];W[bm];B[dl];W[dm];B[el];W[ek];B[ck])(;AW[ai][bj][ck][cl][dl]AB[ah][bh][ci][cj][fj][dk][el][fl](;B[bm];W[bl];B[ak];W[al];B[bi])(;B[dm]C[wrong];W[ak]C[looks like ko]))(;AW[hj][fk][hk][ik][dl][fl][il][dm]AB[gi][hi][ii][cj][ej][fj][ij][dk][jk][bl][cl][jl][kl](;B[im];W[hm];B[gl];W[gk](;B[fm];W[ek];B[cm];W[el];B[jm])(;B[ek]C[wrong];W[el];B[fm];W[jm]))(;B[hm]C[seems wrong];W[im];B[gl];W[gk];B[ek];W[hl];B[gm];W[fm]))(;AW[cj][dj][ek][bl][dl]AB[bi][ci][di][ei][fj][fk][el][fl](;B[al];W[bk];B[ak];W[aj];B[bj];W[am];B[cm];W[dm];B[ak])(;B[ak];W[al]C[looks at least ko])(;B[cm];W[bj]C[alive, right?]))(;AW[dj][ej][fj][gj][ij][jj][ck][cl][jl][kl][cm][fm][hm]AB[ek][fk][gk][hk][dl][il][im];B[dm]C[(A few weeks ago some people tried to kill a group like this, but it didn't work.)];W[dk];B[gm];W[gl];B[fl];W[el];B[hl])(;AW[ej][ck][ek][gk][bl][cl][gl][hl]AB[ch][dh][bi][ei][cj][fj][gj][hj][ak][bk][hk][al][il][jl](;B[bm];W[em];B[cm];W[dm];B[fk];W[fl];B[dk];W[dl];B[dj])(;B[hm]C[the solution shows the other hane, so maybe this is wrong, but I don't know why, so you get your point x.X]))(;AW[db][fb][cc][gc][bd][cd][gd][ce][de][ee][fe][ge]AB[ca][ga][ab][cb][gb][ib][bc][hc][ad][dd][hd][be][he][cf][df][ef][ff][gf][bg];B[eb];W[ea];B[ec];W[fc];B[ed];W[dc];B[fa];W[fd];B[da])(;AW[hh][ih][gi][ji][ki][ej][fj][gj][kj][ek][kk][mk][dl][fl][il][ml][gm][im]AB[hi][ii][hj][jj][fk][gk][ik][jk][gl][jl][kl][ll];B[hm];W[hk];B[fm];W[ij];B[jm])(;AW[bb][db][bc][cc][ec][fc][ee][ef][eg][bh][dh][bi][di]AB[ab][dc][bd][cd][dd][de][df][bg][cg][dg];B[cb](;W[ba]C[official solution];B[be];W[ad];B[cf];W[af];B[ag];W[ae];B[ac])(;W[ca];B[ac];W[ag];B[ba]C[(it's supposed to be a ko)])))