(;AB[qa]AB[qb]AB[qc]AB[qd]AB[qe]AB[re]AB[se]AW[rb]AW[rc]AW[oa]AW[ob]AW[pd]AW[oc]AW[pc]AW[pe]AW[pf]AW[qf]AW[rf]AW[sf]C[Igowin neglected its stones in the corner. White to punish black.]AP[goproblems]
(;W[pa];B[sb]
(;W[sc];B[ra]C[An interesting ko.])
(;W[ra];B[sc]))
(;W[pb]C[NOTTHIS])
(;W[ra];B[sc]
(;W[rd];B[sd])
(;W[sb];B[rd]C[Bad ko for white.]))
(;W[rd];B[sb]
(;W[sc];B[sd];W[sa];B[ra])
(;W[ra];B[sd])
(;W[sd];B[ra]))
(;W[sd];B[sb]
(;W[sc];B[rd];W[sa];B[ra])
(;W[rd];B[ra])
(;W[ra];B[rd]))
(;W[sa];B[sc]
(;W[sb];B[ra];W[sd];B[rd])
(;W[rd];B[ra])
(;W[ra];B[rd]))
(;W[sc];B[ra]
(;W[sb]C[Seki.])
(;W[sa]C[An interesting ko.])
(;W[rd];B[sb];W[sa];B[sd])
(;W[sd];B[sb];W[sa];B[rd]))
(;W[sb];B[ra]C[Do you need to respond to S19? Play (T)enuki if not.]LB[nf:T]
(;W[nf]C[Well done!RIGHT])
(;W[rd];B[sc]C[You brought black back to life! :(])
(;W[sc]C[You brought black back to life in gote! :O])
(;W[sa];B[sc]C[You brought black back to life! :(];W[sd];B[rd])
(;W[sd]C[Black was already dead. -1 pt in gote. :(])
(;W[pa]C[Black was already dead. -1 pt in gote. :(])
(;W[pb]C[Black was already dead. -1 pt in gote. :(])))