Where Did I go wrong?

I played as black in this game, I thought I had it wrapped up, can anyone explain where I went wrong? Thanks..

1. e4  e5 2. Qg4  Nh6 3. Qf4  exf4 4. Bb5  c6 5. Bc4  d5 6. exd5  cxd5 7. Bb3  Bc5 8. d4  Bxd4 9. Ne2  Be5 10. Nd2  Be6 11. Nc3  Qf6 12. Nf3  O-O 13. Nxe5  Qxe5+ 14. Kd1  d4 15. Na4  Rd8 16. Bd2  Bf5 17. Bb4  Nc6 18. Bd2  Rd7 19. Re1  Qf6 20. Nc5  Rd6 21. Nxb7  d3 22. cxd3  Bxd3 23. Re3  fxe3 24. Bxe3  Rb8 25. Kd2  Ne5 26. Rc1  Qxf2+ 27. Bxf2  Rxb7 28. Rc8+  Rd8 29. Rxd8#   1-0

Well,if you want my opinion,your start was a very nice developing,using nice strategy.White on the other hand,played extremely poorly and using total amateur developing,don't know where to start from.I will only mention that the second move was Qg4??(ouch) and the third Qf4,unbelievable.

But,talking about the part that went wrong,as it is written in the annotations,your move 26.Qxf2 was unacceptable since you had many useful choices.That was not an option at all.Moreover,when you decided to capture the knight by using the rook,27.Rxb7, it was too late and in the worst timing.

Last,it worths to mention that besides your wrong move that it was fatal,i think that if you play with the same player ten times,you won't loose a single game since it requires a lot of time for this player to reach a basic knowledge.

I believe that although you made bad choices and in total your game wasn't good enough,the result was very unfair.

1. d4  d5 2. e3  c6 3. a4  Nd7 4. h4  e5 5. Nc3  e4 6. f3  Ngf6 7. fxe4  dxe4 8. g3  Bb4 9. Qd2  h5 10. Bh3  O-O 11. Bxd7  Bxd7 12. Qe2  Rc8 13. Nh3  a5 14. Nf2  Bg4 15. Qd2  Re8 16. Rf1  g6 17. b3  Nd5 18. Bb2  b6 19. Nxg4  hxg4 20. Rf4  Nxf4 21. exf4  c5 22. Ba3  cxd4 23. Bxb4  axb4 24. Ne2  Rc7 25. Qxb4  d3 26. Nd4  Rxc2 27. Nxc2  dxc2 28. Rc1  Qc7 29. Kd2  Rc8 30. Qxe4  f5 31. Qd3  b5 32. Rxc2  Qxc2+ 33. Qxc2  Rxc2+ 34. Kxc2  bxa4 35. bxa4  Kf8 36. a5  Ke8 37. a6  Kd8 38. a7  Kc8 39. a8=Q+  Kc7 40. Qa7+  Kd6 41. Qb8+  Ke6 42. Qg8+  Kf6 43. Qh8+  Ke6 44. h5  gxh5 45. Qxh5  Kf6 46. Qg5+  Ke6 47. Kd3  Kd5 48. Qxf5+  Kd6 49. Qxg4  Kd5 50. f5  Ke5 51. Qe4+  Kf6 52. g4  Kg5 53. Kd4  Kh4 54. f6  Kg5 55. f7  Kf6 56. f8=Q+  Kg5 57. Qef5+  Kh4 58. Qh8+  Kg3 59. g5  Kg2 60. g6  Kg3 61. g7  Kg2 62. g8=Q#   1-0
another lost game....

I cant understand how I dont see checkmate options easier and how I keep blowing these games...

imo You really went wrong when you check him and consequently lost your queen.

When ahead in material, especially by such a large margin, trade down at every opportunity even if it involves giving some of that material back. Like 15./16. Bxb3 would be better as suggested previously. Enough has been said about 26. Qxf2+.

You missed 25.Qxb2+ and win his rook.

You need to watch out for back-rank mates.

ok, what do you mean by trade down?

When you have more pieces you just trade pieces of equal value: by this I mean eat an enemy knite with your knite or a bishop with your bishop ect.

Here's some analisis for your other game:

After 35. bxa4, your king has no chance to get to where the passed pawn is. An easy way to figure out if your king can cover the distance in time is to draw a diagonal line from where the pawn is to the last row. In this case, that square is e8. Now look at that triangle-shaped territory from e8 to a4. If your king is not in that area, he will never get to the pawn before it promotes.

Just something to keep in mind. You should have resigned at 35.

You should think to start with some piece counting! This may look dumb but even stroong players miss this! its quite simple you count how many pieces attack and hoe many defend X square if you can take it! I think at your level you should play throug games from masters and blitz a lot you seem to be just starting right?

if you are winning by a large margin and they have a rook then take one move to fix back row mating threats.  that game was still won after the bishop took the queen.

There are 2 main problems I see with your play, one is easily fixed, the other comes through experience. They are as follows;

1) You missed some obvious things such as, in the 2nd game, the opportunity to pin the Queen to the KIng with the Rook, winning the Queen for the Rook. These things will become more and more obvious as you play more so my advice here is to practice lots on live chess, unrated if you fear for your rating. Practice will also help you blunder less.

2) When your opponent blundered his Queen in the first game, and after you got a Rook for a Knight in the second you were winning in material. In such situation always look to simplify to the endgame by trading off. Remember, when you are up in material, trade off evenly whenever you can, the closer you get to the endgame, with that material advantage still in hand, the more chance you have of winning.

For example, if your opponent goes a minor piece down at the beginning of the game, due to many pawns on the board and the other pieces, through a good move or a pin etc. it is very easy for him to regain the material. However, if you trade off as much as you can after his loss and get to an endgame where you are a whole piece up, you will rarely lose this kind of endgame (provided you don't blunder!!)

Keep up the good work!