
Solution

1. Bc4! bxc4 2. bxc4 traps the black queen.
Once you notice that the black queen was very limited in her mobility, then finding the idea of Bc4 is not that hard.
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1. Bc4! bxc4 2. bxc4 traps the black queen.
Once you notice that the black queen was very limited in her mobility, then finding the idea of Bc4 is not that hard.