Your description of the computer's suggestions doesn't quite match the position, but if you mean the computer suggests Nxe5, that is correct, as Bxe1 leads to a variation of [Legal's Mate][1]. 1. Nxe5 Bxe1 2. Bxf7+ Ke7 3. Nd4# [1]: https://en.wikipedia.org/wiki/L%C3%A9gal_Trap