(;SZ[13]AB[ae]AB[bd]AB[bc]AB[cc]AB[ah]AB[ai]AB[bi]AB[ch]AB[dh]AB[dg]AB[eg]AB[ef]AB[fh]AB[gh]AB[gg]AB[hh]AB[ih]AB[ig]AB[jg]AB[jf]AB[je]AB[ie]AB[jd]AB[jc]AB[kc]AB[lc]AB[jb]AB[ib]AB[ia]AB[ha]AB[ic]AB[hc]AB[kg]AB[kh]AB[jh]AB[ii]AB[ij]AB[ik]AB[jl]AB[jm]AB[im]AB[hl]AB[gk]AB[ck]AB[dj]AW[db]AW[dd]AW[cd]AW[be]AW[af]AW[ag]AW[bg]AW[bh]AW[cg]AW[cf]AW[df]AW[ff]AW[fg]AW[gf]AW[hf]AW[hg]AW[if]AW[he]AW[hd]AW[id]AB[gd]AW[gc]AW[fc]AW[gb]AW[ga]AW[hb]AW[ja]AW[ka]AW[kb]AW[lb]AW[mc]AW[ld]AW[kd]AW[ke]AW[kf]AW[lg]AW[lh]AW[li]AW[ki]AW[ji]AB[jj]AB[kj]AW[lj]AW[kk]AW[jk]AW[kl]AW[km]MA[ef]C[White to successfuly defend against the invasion in the simplest way and win the game]AP[goproblems]
(;W[ee];B[fe];W[fd];B[ge])
(;W[de];B[fe])
(;W[ed];B[fe])
(;W[fd];B[fe])
(;W[ge];B[fe])
(;W[fe];B[ee]
(;W[ed]C[RIGHT])
(;W[fd];B[ed])
(;W[de];B[ed])))