(;AW[qf]AW[rf]AW[sf]AW[qe]AW[rd]AW[qc]AB[qd]AB[pd]AB[od]AB[pe]AB[pf]AB[qg]AB[rg]AB[qi]AW[pg]AW[md]AW[kd]C[Capture the cutting stone]AP[goproblems]
(;B[oh]
(;W[og]C[CHOICE];B[ng];W[ph]
(;B[oi]C[RIGHT])
(;B[pi];W[nh]
(;B[oi];W[nf];B[mg];W[of])
(;B[nf];W[oi])
(;B[of];W[oi])
(;B[qh];W[oi])))
(;W[ph]C[CHOICE]
(;B[pi];W[og];B[ng])
(;B[oi]C[RIGHT])))
(;B[og];W[ph]
(;B[oh];W[pi])
(;B[oi];W[oh];B[nh];W[ng]
(;B[of];W[ni];B[mh];W[pi])
(;B[pi];W[of];B[qh];W[og]))
(;B[ni];W[pi];B[pj];W[oj];B[oi];W[qj];B[pk];W[qh];B[ri];W[rh]))
(;B[ph];W[og]
(;B[nh];W[ng])
(;B[ng];W[oh];B[oi];W[nh])))