Many, many opening traps involve a surprise queen check that picks up an errant piece. This includes the shortest decisive master game in history (apart from no-move forfeits, 1.c4 Resigns and such), given below. Black's 3...Qa5+ forks White's king and bishop, winning the latter. If you look at big databases, you'll see that this trap has also occurred a number of times since. Occasionally White has even drawn the game, despite dropping a clear piece on move 3! The website 365chess.com (highly recommended; it allows you free access to a 3.5 million game database) has seven games with this trap, two of which ended in draws!! The Black players who only drew were rated 2259 and 2199. These games provide further proof of the truth of the adages, "You can't win [or even draw] by resigning." and "The hardest thing in chess is to win a won game."