Solution
1. Qxe4!
White realised he can safely capture the black knight and rely on the X-ray effect of the c1-rook to defend the back-rank.
1. Qxe4 Qd1+ 2. Qe1
Note that 1. Qxe4 Qd1+ 2. Rxd1?? Rxd1+ and white loses.
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1. Qxe4!
White realised he can safely capture the black knight and rely on the X-ray effect of the c1-rook to defend the back-rank.
1. Qxe4 Qd1+ 2. Qe1
Note that 1. Qxe4 Qd1+ 2. Rxd1?? Rxd1+ and white loses.