Solution
1… Qd1+ 2. Kc3 Rxd8 wins material since the black queen and rook will defend one another through the X-ray effect.
Exercise #69
Structured Chess Training
1… Qd1+ 2. Kc3 Rxd8 wins material since the black queen and rook will defend one another through the X-ray effect.
Notice that 1…Rd8+ is mistake because, white takes the rook with check 2.Qxd8+ winning a tempo, Kh7, and white queen moves away from the d-file, and black queen can’t win the white queen with Qd1+