1. Rc8 Qxc8 2. Qh8+, followed by Qxc8.
Similarly to the previous examples, white uses a tactical idea (The pin by 1.Rc8) to prepare another tactical idea (a skewer by 2.Qh8+)
The key to finding the tactic here, is to realize that the c8-square is “indirectly defended” due to the possible skewer–Qh8+