(;SZ[19]AW[ca]AW[da]AW[cb]AW[fb]AW[hb]AW[dc]AW[gc]AW[hc]AW[dd]AW[ed]AW[fd]AB[ba]AB[ha]AB[ia]AB[bb]AB[ib]AB[cc]AB[ic]AB[cd]AB[gd]AB[hd]AB[id]AB[ce]AB[de]AB[ee]AB[fe]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]PW[White]PB[Black]
(;B[fa];W[eb])
(;B[ga];W[eb])
(;B[ea];W[eb]
(;B[db];W[ga])
(;B[ga];W[fa])
(;B[fc];W[fa])
(;B[fa];W[ga]))
(;B[eb]
(;W[db]
(;B[ga]C[RIGHT])
(;B[fa];W[ga]C[ko is not the best black can do.])
(;B[ea]
(;W[fa]C[CHOICE];B[ga];W[ec];B[gb]C[RIGHT])
(;W[ga];B[fc]C[RIGHT]))
(;B[ec];W[ga]))
(;W[ea];B[ga]C[RIGHT])
(;W[fa];B[ga];W[gb]
(;B[ec]C[RIGHT])
(;B[ea]C[RIGHT]))
(;W[ga];B[ea];W[db];B[fc]C[RIGHT]))
(;B[fc];W[eb]
(;B[fa];W[gb])
(;B[ga];W[fa])
(;B[gb];W[fa])))