White to move - mate in 3

Erhard Bernhoeft vs E Svedenloef, corr., 1964

[FEN "r3kb1r/1b1n2pp/pq1pN3/1p1Q2B1/4P3/8/PPP2PPP/R4RK1 w kq - 1 0 KQkq - 0 1"] [NAVIGATION "0"] [CUSTOM_MOVE "1"] 1.Nc7+ Qxc7 2.Qe6+ Be7 3.Qxe7#