Final position — White delivers mate
The moves
| 1. | e4 | e5 |
| 2. | Nf3 | Nc6 |
| 3. | Bb5 | Nf6 |
| 4. | d3 | Ne7 |
| 5. | Nxe5 | c6 |
| 6. | Nc4 | cxb5 |
| 7. | Nd6# |
How the Mortimer Trap works
The Mortimer Trap is a classic chess opening trap arising from the Ruy Lopez. In this line White delivers checkmate on move 7, punishing a natural-looking but losing idea from Black.
The full sequence runs 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Ne7 5.Nxe5 c6 6.Nc4 cxb5 7.Nd6#. Each move looks reasonable, which is exactly why the trap is so effective over the board — Black walks into it while trying to play "normal" developing moves.
Recognising this pattern early lets you either spring it as White or calmly sidestep it when you are Black.
Practice this trap move-by-move
Open the Mortimer Trap in the Trapsterapp to play it out on a live board, drill it in practice mode, and learn how to avoid it when it's set for you — along with the full library of chess traps and gambits, fully offline.