Counter-check
From our UK edition
For a chess player, delivering a check to the king always feels like asking a question, as if to say, ‘What are you going to do about that?’ And I was instructed as a child: ‘Don’t answer a question with a question!’ So naturally, I get an impish thrill from those rare occasions where a check is met by a move which simultaneously delivers a check to the opponent. Such a counter-check could even be mate. That circumstance is vanishingly rare in practical play, but composers of chess problems have often toyed with the idea. One shining example is the position in the first diagram, a mate in three composed by Sam Loyd in 1903.