(;AP[goproblems]AW[fe]AW[ef]AW[ff]AW[gf]AW[eg]AW[eh]AW[he]AW[ie]AW[je]AW[ke]AW[le]AW[jd]AW[mf]AW[kg]AW[jg]AB[kf]AB[jf]AB[if]AB[hf]AB[hg]AB[gg]AW[ig]AB[df]AB[dg]AB[dh]AB[ee]AB[ed]AB[ec]AB[eb]AW[de]AW[dd]AW[dc]AW[db]AB[ge]AB[gd]AB[hd]AB[id]AB[hc]AB[hb]AB[ia]AB[jb]AB[jc]AB[kb]AW[md]AW[lf]AB[lg]AB[lh]AB[mh]AW[ih]AW[hi]AB[fh]AW[gj]TR[fh]TR[gg]TR[hg]TR[hf]TR[if]TR[jf]TR[kf]C[white to kill marked black stones](;W[fi];B[ei](;W[gh];B[fd](;W[hh];B[fg])(;W[fg];B[fh]))(;W[di];B[ej];W[gh];B[fd];W[fg];B[fh]))(;W[ei]C[well done!!! f11 was forbiddenRIGHT])(;W[fg];B[ei])(;W[gh];B[ei](;W[hh]C[well done!!! f11 was forbiddenRIGHT])(;W[fg];B[fd])(;W[fi];B[fd];W[fg];B[fh])(;W[fd];B[fc]))(;W[fd];B[ei](;W[fc];B[fb])(;W[fb];B[fc])(;W[gh];B[fc])(;W[fi];B[fc])))