Solution
1… Qxc4 makes use of the X-ray effect of the c8-rook to win the white bishop.
Notice that 1… Qxc4 allows 2. Qxe7+, but after 2… Kg8, black is fine and won a piece in the process.
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1… Qxc4 makes use of the X-ray effect of the c8-rook to win the white bishop.
Notice that 1… Qxc4 allows 2. Qxe7+, but after 2… Kg8, black is fine and won a piece in the process.