(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[9]KM[0.00]
PB[Noir]AW[cc][dc][ec][cd][fd][gd][ce][ee][ge][cf][ef][gf][bg][cg][fg][gg][bh][gh][bi][fi][gi]AB[fc][gc][hc][dd][ed][hd][de][he][df][hf][dg][eg][hg][ch][dh][fh][hh][ci][ei][hi]
(;B[ff]C[Forced, else]
(;W[eh]C[else...]
;B[fe]
;W[di]
;B[eb]C[Not a ko threat, but...]
(;W[ef]C[forced for the same reason: ]
;B[ei]
;W[ee]
;B[fh]
;W[db]C[And so on]
;B[ff]
;W[eh]
;B[fe]
;W[di]
;B[fb]
;W[ef]
;B[ei]
;W[ee]
;B[fh]
;W[ea]
;B[ff]
;W[eh]
;B[fe]
;W[di]
;B[fa]
;W[ef]
;B[ei]
;W[ee]
;B[fh]
;W[da]
;B[ff]
;W[eh]
;B[fe]
;W[di]C[Now, we enter the real complications. If Black passes]
(;B[]
;W[ef]
;B[ei]
;W[ee]
(;B[fh]C[this move becomes illegal, as the position was already seen at move 30l. Therefore
a) With Japanese rulles, the game ends (mushobu, it is void and must be replayed) , so White had better pass immadiately (at move  36) , winning on the board (but Japanese pros don't seem to agree on this result)

b) With AGA rules : Black *must* play elsewhere  (superko rule), and loses immadiately (see next variation), which explains variations at move 35

c) if the superko rule is modified  (the  Bill Spight proposal), it becomes a true infinite repetition, and probably will be counted as mushobu])
(;B[bb]
;W[di]))
(;B[hb]
;W[ef]
;B[ei]
;W[ee]
;B[fh]
;W[bc]
;B[ff]
;W[eh]
;B[fe]
;W[di]
;B[ha]C[etc. This line of play leads to Black failure, as she will have to fill her own eyes long before White does.But...])
(;B[bb]
;W[ef]
;B[ei]
;W[ee]
;B[fh]
;W[bc]
;B[ff]
;W[eh]
;B[fe]
;W[di]
;B[ab]C[This other line of play  is completely unclear. I let the reader try to solve it  (it is called a pass fight), but be warned that the present theory (and of course the players' experience)  is probably much too incomplete to get a definitive conclusion...]
(;W[ac]C[I dont show the cycle any longer (but it must still be played at *each* outside move, of course)]
;B[ae]
;W[be]
;B[ad]
;W[af]
;B[ah]
;W[bd]
;B[ae]
;W[ad]
;B[ag]
;W[ai]
;B[ag]
;W[ah]
;B[cb]
;W[ca]
;B[hb]
;W[ba]
;B[ha]
;W[aa]
;B[bb]
;W[cb]
;B[gb]
;W[ab]
;B[ga]
;W[bb]
;B[ia]
;W[bf]
;B[ic]C[Just for the fun, to show that if White dont mimic Black, he loses heavily])
(;W[hb]C[I dont show the cycle any longer (but it must still be played at *each* outside move, of course)]
;B[ac]
;W[ad]
;B[ib]
;W[ha]
;B[ae]
;W[bd]
;B[af]
;W[if]
;B[ie]
;W[ic]
;B[id]
;W[ag]
;B[ah]
;W[ba]
;B[cb]
;W[ca]
;B[ig]
;W[aa]
;B[ab]
;W[bb]
;B[gb]
;W[bf]
;B[ga]
;W[be]
;B[ae]
;W[ac]
;B[ia]
;W[hb]
;B[ha]
;W[ih]
;B[ii]
;W[af]
;B[hb]
;W[ai]C[Here, White wins (by only two moves)])))
(;W[db]
;B[ei]
;W[fb]
;B[fh]))
(;W[fe]
;B[ff]))
(;B[eb]
;W[eh]
;B[db]
;W[di]))
