(;
AW[mb][nc][nd][od][qd][oe][pe][of][qf][pg]
AB[lb][nb][mc][oc][pc][pd][rd][qe][re]TR[pg]
LB[of:1][rd:2][nc:3][nb:4][mb:5][mc:6][nd:7][lb:8]PL[W]
C[Black played tenuki after the marked white move. Then white proceeds with 1 to 7. Black 8 is an overplay. White to play.
]
(;W[ob];B[ma]
(;W[qc];B[pb]
(;W[qb];B[oa]
(;W[rc];B[sb]
(;W[rf];B[sc]
(;W[sd];B[se];W[sf];B[sd];W[rb]C[RIGHT
])
(;W[se];B[sd])
)
(;W[sd];B[sc];W[rf];B[se];W[sf];B[sd];W[rb]C[RIGHT
])
(;W[sc];B[qa];W[ra];B[sd]
C[Ko. Since black could have captured white without ko I count this ko as wrong even it is very troublesome for black.
])
)
(;W[rb];B[sb]
(;W[sc];B[rc];W[sa];B[sd]C[Only ko.
])
(;W[rc];B[sc]C[White looses the capturing race.
])
(;W[rf];B[rc]C[White looses the capturing race.
])
)
(;W[sc];B[rc];W[rb];B[sb];W[sa];B[sd]C[Ko.
])
)
(;W[rc];B[qb];W[rb];B[ra];W[sb];B[sc];W[sd];B[se]C[Only ko.
])
)
(;W[pb];B[qc])
)
(;W[qc];B[pb]C[White looses the capturing race.
])
(;W[pb];B[qc])
)
