Kf1 → Qe1# mate: Traxler Counterattack line

White hides the king in the corner. The corner turns out to be a trap.

1. e4
2. e5
3. Nf3
4. Nc6
5. Bc4
6. Nf6
7. Ng5
8. Bc5
9. Nxf7
10. Bxf2+
11. Kxf2
12. Nxe4+
13. Kf1
14. Qh4
15. Qf3
16. Nd4
17. Qe3
18. Nxc2
19. Qf3
20. Qe1#