As usual in these positions, you likely wouldn't be thinking of a skewer right away; you would be worrying about White’s threat of Qxg7#. No matter how dire the threat, however, remember: inspect your own checks; so long as you are playing checks your opponent probably will be kept busy and won't be able to play threats of his own. It doesn’t always take long to inspect those checks, either. Here Black has just one—Qh1+. White’s only move is Kg3. Now it starts to get interesting, as White’s king is pushed toward the f-file where his queen sits. What checks then would be possible? The appealing one is Qxh3+, where the bishop serves its familiar dual purpose of protecting the queen against KxQ and also limiting the king’s flight squares. The king has to go to f4. The kernel of the skewer is in place, and invites one last check: Qf3+, made safe by the protection still supplied by the bishop. White’s king moves and his queen then comes off the board.