(;SZ[13]AB[bb]AB[cb]AB[eb]AB[ec]AB[ed]AB[dc]AB[fc]AB[gb]AB[hb]AB[ib]AB[ic]AB[jc]AB[kc]AB[lc]AB[kb]AW[da]AW[db]AW[ab]AW[bc]AW[cc]AW[dd]AW[ee]AW[ce]AW[fd]AW[gc]AW[hc]AW[ge]AW[id]AW[jd]AW[kd]AW[ld]AW[md]AW[mc]AW[mb]AW[lb]AW[ja]AW[jb]AW[ia]AW[ka]C[black play an survive]AP[goproblems] (;B[ha];W[ea];B[la];W[ja];B[fb];W[fa] (;B[ba];W[ac];B[ga];W[aa];B[ca];W[ea] (;B[ka];W[db];B[fa];W[da];B[cb]C[Black play and survive !RIGHT]) (;B[fa];W[da];B[ka];W[db];B[cb]C[Black play and survive !RIGHT])) (;B[ga];W[ba];B[ca];W[ea] (;B[ka];W[db] (;B[fa];W[da]) (;B[aa]C[Just ko])) (;B[db];W[ka]) (;B[aa]C[Just ko]))) (;B[fa];W[ha];B[ea];W[la];B[ca];W[ga]) (;B[ea];W[ga] (;B[ca];W[ha]) (;B[fa];W[fb])) (;B[la];W[ea];B[ha];W[ja];B[fb];W[fa] (;B[ba];W[ac];B[ga];W[aa];B[ca];W[ea] (;B[ka];W[db];B[fa];W[da];B[cb]C[Black play and survive !RIGHT]) (;B[fa];W[da];B[ka];W[db])) (;B[ga];W[ba];B[ca];W[ea] (;B[ka];W[db] (;B[fa];W[da]) (;B[aa]C[Just ko])) (;B[db];W[ka]) (;B[aa]C[Just ko]))))