1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6 *

The Mortimer Trap is a variation of the Berlin Defense in the Ruy Lopez played with the Black pieces. The exact sequence of variations goes as follows, including the ECO:
C65: Ruy López Opening: Berlin Defense, Mortimer Variation, Mortimer Trap
Main Line
Example
I hope this guide on the Mortimer Trap helped you. If you liked this post, you may want to learn other Chess Traps like the Halosar Trap and Magnus Smith Trap.