This game concludes with one of my favorite mating patterns. I had seen it in puzzles before, but this was the first time I've actually had it happen in a game. Enjoy!
1. e4 e5 2. Ng1f3 Nb8c6 3. Bf1c4 Ng8f6
Two Knights' Defense - a playable defense but full of possibilities for missteps. I enjoy playing white against it, unless black plays really well - and then it's not much fun, as white loses time while black develops and gains space.
4. Nf3g5 d5 5. exd5 Nc6a5 6. Bc4b5 Bc8d7
?! More common is 6. ... c6 7. dxc6 bxc6.
7. Qd1e2
White's position is already all attack: e5, a5, d7, and f7 are all contested squares/pieces. That's the danger of the Two Knights' Defense - it's got to be a strong defense.
7... Bf8d6 8. d4 O-O 9. dxe5 Rf8e8
This counter-pin is a good idea, now that the pressure on the king has been alleviated. Except...
10. e6
The best defense is a good offense, right? Black may be able to back out of this by trading bishops and defending f7, but black's next move opens the floodgates.
Now the mating pattern is set up. Black still can't take on e6 without losing material.
13... Qd8c8
Attack the pinned pawn, right? But remember, it's confined to the e-file but isn't immobile...
14. e7 Kg8h8
?? After 14. ... Be6, black will be down a piece for a pawn, and white's knight will be in jeopardy on e6. That's certainly playable, but this move loses immediately.
15. Ng5f7
Black resigns. After 15. ... Kg8, a smothered mate follows quickly via a queen sacrifice: 16. Nh6+ is a double check that forces the king to move. Then 16. ... Kh8 17. Qg8+ Rxg8 (or Nxg8) 18. Nf7++.
