How good is your chess?

[FEN "2r4k/4RRp1/7N/p7/Pp1r4/1P6/1P3PPP/1K6 w - - 0 1"]

1. Nf5 Rg4 2. Nd6 Rd8 3. Re8+ Rxe8 4. Nxe8 Rxg2 5. Rxg7 {Black decides not to go into a lost ending.} 5... Rxf2 6. Rg1 {This has a cunning point.} 6... Rxh2 7. Nf6 {And mate on on g8 cannot be stopped and Black does not have the Rh1+ Ka2 Ra1+ idea,} 7... Rxb2+ {Arghhhhhh......................} 8. Kc1 Rc2+ 9. Kd1 Rd2+ 10. Ke1 Re2+ 11. Kf1 Rf2+ 12. Ke1 Re2+