This one is tougher because at first glance the idea of a skewer probably wouldn't suggest itself at all. White’s king is two ranks away from its queen. More likely you would have to experiment with checks and see that one of them, Qh1, causes White's king to squirt down and over onto g3. The idea of the skewer should begin to come into view then, as the position starts to look like the previous ones. Might Black force the king further down and over onto f2? It seems hard because Black’s queen doesn’t have a bishop this time to furnish cover as it delivers close-up checks. But remember that other pieces can chip in with checks of their own. Other pieces—or pawns. Black plays h5-h4+, and this time the queen is the piece providing cover. White's king is forced to f2. The usual pattern for the skewer has been perfected. Black plays Qh2+ and wins the queen next move.