Chess Online

In the alternative solution

1. ... Qf6
2. Ng4 Kh8
3. Nxf6 Rxf6

and then instead of 4. Rg6 (rated 14.91)

the alternative (rated 10.82) continues

4. Re1 Bc6
5. Rb1 Re2
6. Kf1 Bd7
7. Qg4 Rxf2+
8. Kg1 g5
9. Bxd7 Nd3
10. Be6 Nb4
11. Rh3 Ra2
12. Qxg5 Rxe6
13. Rxb4

but then black can mate with

Re1#