(;AB[qf]AB[rf]AB[pd]AB[pc]AW[pb]AW[qc]AW[qd]AW[rb]AW[nc]AW[kc]AB[pg]AB[ph]AW[pf]AB[mg]AW[qg]AW[rg]AW[pi]AW[qi]TR[pf]MA[qf]MA[rf]MA[pd]MA[pc]MA[pg]MA[ph]AP[goproblems]
(;B[oe];W[of]
(;B[nf];W[og]
(;B[oh]C[The stone was captured using chin strap.RIGHT])
(;B[ng];W[oh])
(;B[nh];W[oh])
(;B[pe];W[oh]))
(;B[og];W[nf]MA[oe]MA[pd]MA[pc]MA[qf]MA[rf])
(;B[ng];W[nf])
(;B[mf];W[ne])
(;B[ne];W[qe])
(;B[oh];W[ne])
(;B[nh];W[ne])
(;B[pe];W[nf]))
(;B[of];W[pe]
(;B[oe];W[qe]MA[qf]MA[rf])
(;B[qe];W[oe]MA[qe]MA[qf]MA[rf]MA[pd]MA[pc]))
(;B[pe];W[of]
(;B[oe];W[nf])
(;B[ne];W[nf]TR[mf]TR[oh])
(;B[nf];W[oe])
(;B[me];W[oe])
(;B[mf];W[oe])
(;B[ng];W[oe])
(;B[og];W[oe])
(;B[nh];W[oe])
(;B[oh];W[oe])
(;B[nd];W[mf]C[The　pivotal stone has escaped.
]))
(;B[nd];W[pe])
(;B[qe];W[of])
(;B[od];W[of])
(;B[ne];W[of])
(;B[me];W[oe])
(;B[mf];W[oe])
(;B[nf];W[oe])
(;B[ng];W[oe])
(;B[og];W[oe])
(;B[nh];W[oe])
(;B[oh];W[oe]))