(;AP[goproblems]AW[sb]AW[rb]AW[qb]AW[qa]AW[oa]AW[ob]AW[pc]AW[pd]AB[rd]AB[qd]AB[qf]AB[pe]AB[oe]AB[od]AB[oc]AB[nb]AB[na]AB[mc]C[Black to kill.](;B[pb]C[];W[pa](;B[qc]C[Good Job! White is dead. This is called a throw-in. You're sacrificing a stone to create a false eye. White would only make further plays as ko threats.RIGHT])(;B[rc];W[qc])(;B[sc];W[qc])(;B[ra];W[qc])(;B[sa];W[qc]))(;B[pa];W[pb]C[Two eyes. Three points.])(;B[qc]C[];W[pb]C[Your last play is where White would have liked to have moved in order to increase his territory by 1 point. Play at T16 to see how.White lives. Two eyes. Three points.])(;B[sd]TR[qc]C[];W[qc]C[I included this move just to show how White gains a point by playing at the marked point.](;B[pb];W[pa]C[Two eyes. Three points, one capture.])(;B[pa];W[pb]C[Two eyes. Three points, one capture.]))(;B[rc];W[qc])(;B[sc];W[qc])(;B[ra];W[qc])(;B[sa];W[qc]))