You are black. Once you were playing a good game and then, suddenly, you saw a nice piece of white territory. "Ha!" you said for yourself, "I will turn this territory into neutral points!" You made a perfect plan and started. But your opponent was smart and the territory turned to be a trap. Your stones got surrounded and cut from their friends on the left.
Once more, the game depends on your calm mind and ability to solve this uneasy position!
(;AB[rb]AB[pb]AW[ob]AW[oc]AB[qc]AW[pd]AW[pc]AW[pe]AB[mb]AB[lc]AW[rd]AW[pf]AW[sf]C[Consider the two black stones on the left alive :)]AP[goproblems]
(;B[oa];W[na]
(;B[qa]
(;W[rc];B[nb]C[Good, ko for connection!RIGHT])
(;W[nb];B[rc];W[pa]C[Ko for life!RIGHT]))
(;B[pa];W[nb]
(;B[rc];W[ra]C[White is happy with this])
(;B[ra];W[rc]MA[qb]MA[sb]C[Black cannot make two eyes now])))
(;B[qa];W[oa]MA[pa]MA[rc]C[The marked points are miai and black corner is dead])
(;B[rc];W[oa]
(;B[qa];W[pa]C[You got killed :(])
(;B[pa];W[ra]C[Dead unconditionally]))
(;B[sc];W[oa]C[The corner is dead])
(;B[pa];W[oa]
(;B[rc];W[ra]C[Dead unconditionally])
(;B[ra];W[rc]MA[qb]MA[sb]C[Black is dead here])))