A mysterious mate in one Here's a question that's a little off the usual format, but problem questions like this have been done before and are on topic, so here we go!
Question: Can you find the mysterious mate in one? The trick is not board rotation, removing a piece, retracting any moves, completing a move, or an illegal move-there is but one solution. Have fun solving!
 [Title &quot;White checkmates Black in one move&quot;]
 [FEN &quot;5nRQ/6PR/1p6/p2P4/p1B5/3Pp3/8/1b1K4 w - - 0 1&quot;]
Looking at the problem as if the black King is currently invisible...

gxf8=Q#
All squares are now covered. So where ever the black King is hiding, the game is over.