I think it was this game.
White (Carlsen) drops his Queen on move 10.
Black (Snoopy) screws up the ending.
[Event "Mini Banded Octet"]
[Site "http://www.redhotpawn.com"]
[Date "2011.07.13"]
[EndDate "2011.08.07"]
[Round "1"]
[White "Kimo Sabie"]
[Black "The Dark Knight 777"]
[WhiteRating "1030"]
[BlackRating "1333"]
[WhiteElo "1030"]
[BlackElo "1333"]
[Result "1/2-1/2"]
[GameId "8559626"]
1. e4 c5 2. d4 cxd4 3. Qd1xd4 Nb8c6 4. Qd4e3 e5 5. a3 Nc6d4 6. Bf1d3 Ng8f6 7. h3 b6 8. Ng1f3 Bf8c5 9. Nf3xe5 Nd4xc2 10. Bd3xc2 Bc5xe3 11. Bc1xe3 O-O 12. O-O Rf8e8 13. f4 Bc8b7 14. Nb1c3 d5 15. Ra1d1 Qd8c8 16. exd5 Re8d8 17. g4 Nf6xd5 18. Be3d4 Nd5xc3 19. Bd4xc3 Rd8xd1 20. Rf1xd1 f6 21. Ne5d3 Qc8c6 22. Rd1d2 Ra8e8 23. Bc3d4 Qc6e4 24. Rd2f2 Qe4xd4 25. Kg1h2 Bb7a6 26. Rf2f3 Ba6xd3 27. Bc2xd3 Qd4xb2 28. Kh2g3 Re8c8 29. Kg3h4 Rc8c3 30. Bd3e4 Rc3xf3 31. Be4xf3 Qb2xa3 32. Bf3d5 Kg8f8 33. f5 g5 34. fxg6 hxg6 35. g5 fxg5 36. Kh4xg5 Qa3c5 37. Kg5xg6 Qc5xd5 38. h4 Qd5g8 39. Kg6h6 b5 40. h5 b4