Oh, it happens to me all the time, trust me. I'll have a winning position against a 1700 and then inexplicably drop a rook.
I've found the only way to cure this is to force yourself to do a "blunder check" every time you make a move until it becomes second-nature - Silman says in The Amateur's Mind that at the end of your analysis of a move, you should just go back and make sure that it doesn't leave anything hanging or fall into a simple tactic.
I think a blunder check is a smart thing to do. I was playing this game on the train on my phone and obviously not giving it my full attention. My opponent is going to have a nice surprise when he goes to make his next move. Ugh. I'm such a doofus.
Have you ever been winning a game, and then gave the game away by playing the most mind numblingly stupid move you could have played? Sigh. I want to cry or bang my head against the wall.
It typically happens when I play on my phone.
Yes I see what you mean. I have done the same, and worse. So have we all. As you play more, you will make less of these, and your rating will go up. As you play against better players, they will make less blunders - so will you. If it makes you feel any better, one of my opponents a week ago, left his Q hanging. His rating was 1800 ish and he resigned forthwith. I have done the same, and it's an awful feeling. Try to put it behind you, and get on with the game
I once dropped my queen in an attack, resigned and had a stronger player say that I had a mate in 3. Taking my queen was the blunder lol
Have you ever been winning a game, and then gave the game away by playing the most mind numblingly stupid move you could have played? Sigh. I want to cry or bang my head against the wall.
Have you ever been winning a game, and then gave the game away by playing the most mind numblingly stupid move you could have played? Sigh. I want to cry or bang my head against the wall.
I was playing a 5 hours game otb. 2 hours 40 moves and + 30 minutes after that.
I think it was around 2 hours and 15 of my time and I had a winning position. I must have been tired cause I think I had a tactic winning the undefended queen the first move was a sacrifice of my calculation.
after I sacrified the piece I noticed to my horror that the queen was defended.
my mind must have played a trick on me.
I felt like Kasparov on the clip where he shakes his head.
I once had an opponent resign in a blitz game when he had mate on the move on the opposite side of the board to where all the action was. He just missed it, as did I until I looked at the game afterwards.
I have very commonly played a good game and gradually accrued advantages to get a winning position, then thrown it away with one terrible move. This is the most annoying blunder.
I also once thought I had plyed a neat sacrifice to get a bishop and queen mate, until I discovered the queen would have to execute a Rivelino style curve to reach the required square. And it all looked so good in my head.
I once dropped my queen in an attack, resigned and had a stronger player say that I had a mate in 3. Taking my queen was the blunder lol
That sucks! I once went pawn hunting after grabbing the queen only to be mated because one of the pawns I took freed up their piece. Never again!
two players played a game one offered draw and the other accepted, the only "problem" was that neither player saw that the one player just mated the other.
however as he offered draw and the other accepted the result was a draw.
I thought mate would automatically end the game.
Have you ever been winning a game, and then gave the game away by playing the most mind numblingly stupid move you could have played? Sigh. I want to cry or bang my head against the wall.
I could write a book on how to blow a won game.
I thought mate would automatically end the game.
I thought so too. however the arbiter ruled that the draw was the result of the game. He is sometimes arbiter at important games so I guess he knows the law.
I could write a book on how to blow a won game.
I think everyone under master level could.
found the game:
[Event "Lxgumkloster 2008"] [Site "Lxgumkloster"] otb 2 hours each. [Date "2008.04.22"] [Round "2"] [White "NN"] [Black "NN"] [Result "1/2-1/2"] [WhiteElo "1428"] [BlackElo "1464"] 1. e3 d5 2. d4 c5 3. c3 e6 4. Nf3 Nf6 5. Be2 Be7 6. O-O O-O 7. Nbd2 a6 8. b3 Nc6 9. Bb2 Bd7 10. a3 Qc7 11. c4 Rfe8 12. cxd5 exd5 13. Rc1 Qb6 14. dxc5 Qa7 15. b4 Bd8 16. Nb3 Qb8 17. Bxf6 Bxf6 18. Qxd5 Be6 19. Qd1 Bb2 20. Nbd4 Rd8 21. Qc2 Bxc1 22. Rxc1 Bd5 23. Bd3 h6 24. Nxc6 Bxc6 25. Nd4 Bd5 26. Qc3 Qe5 27. Bc4 Bc6 28. Qb3 Qf6 29. Nxc6 bxc6 30. g3 Rd2 31. Rf1 Rad8 32. Qa4 Qf3 33. Bb3 Re8 34. Bc4 Rxe3 35. Qxa6 Kh7 36. Qb7 f6 37. Qf7 Rxa3 38. Qg8+ Kg6 39. Qf7+ Kg5 40. Qxg7+ Kf5 41. Qh7+ Ke5 42. Qe7+ Kd4 43. Qd7+ Kc3 44. Rc1+ Kb2 45. Qxd2# 1/2-1/2
notice even though # it is a draw.
Silman has the IM next to his name (which comes from a lifetime of work at it) but his thoughts are the most bland, uninteresting, and unexplored drivel I've ever read, not to mention his atrocious metaphors: "Pretend you're a spider wrapping up your prey" Pee-U, his stuff stinks to high heaven. Oh to have back the bucks I wasted on that dude. For pure hilarity, read his stuff on the Grob: defend the g pawn with 2. h3. Lord, it's the essence of why he's not a GM, because he's a defeatist. Stop reading his drivel and write your own destiny.
It can be also nice to miss games won, think about how your opponent will be happy! In life we have to do charity sometime. 
Bobby: What happens if I keep on moving after being mated? Can i just refuse the result and keep on playing? I know in golf, once the ball is in the cup, the hole is over.
Have you ever been winning a game, and then gave the game away by playing the most mind numblingly stupid move you could have played? Sigh. I want to cry or bang my head against the wall.