I'm playing as white against a cpu. Black has a knight on A7, which he moved to D4 to capture my queen. How is this possible? I've been playing chess for almost 20 years and I have never seen ir heard of this move. Is this a special knight move? What is it called?
3Na7xd4 is not a legal move. What chess engine? Do you have the PGN?– intx13Jun 18, 2015 at 22:59
It's called a double jump. Oops, wrong game...– Pete BeckerJun 19, 2015 at 0:29
Indeed, that is not a legal move. Are you sure it wasn't a bishop instead of a knight, going from a7 to d4?– Maxwell86Jun 19, 2015 at 6:17
From A7, the only possibilities for knight are jumping to C file (C8, C6) or to B5. The rest are not possible. Seems like a computer bug!! What software are you using?– pbuJun 22, 2015 at 13:10
Without further context, I can simply say that the move you described is not a legal knight move in any position or circumstance. It is, however, a legal move for a bishop. Perhaps you mistook the bishop for a knight.
If you could supply the PGN of the game, it would clear up some confusion.