Our 64 most memorable blunders

@kyanh said ^

Ke8?? going for the win

Oof. Added.
You can't win a game if you acquiesce to a perpetual...

@Craze said ^

[Event "Asian Nations (Regions) Men Online Cup"]
[Site "Chess.com"]
[Date "2020.10.25"]
[Round "6.3"]
[White "Ganguly, Surya Shekhar"]
[Black "Illingworth, Max"]
[Result "1-0"]
[Annotator "might"]
[ECO "A00"]
[WhiteElo "2646"]
[BlackElo "2498"]
[WhiteFideId "-1"]
[BlackFideId "-1"]
[PlyCount "117"]
[GameId "384535834052"]
[EventDate "2020.10.23"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "UAE"]
[Source "Max Illingworth"]
[WhiteTeam "India"]
[BlackTeam "Australia"]
[WhiteTeamCountry "IND"]
[BlackTeamCountry "AUS"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Nc6 6. g3 Qb6 7. Ndb5 Ne5 8. Bg2 a6 9. Qa4 Rb8 10. Na3 Qb4 11. Bf4 Qxa4 12. Nxa4 d6 13. Nb6 Bd7 14. Nxd7 Nfxd7 15. Rc1 Be7 16. O-O O-O 17. Be3 Rbc8 18. Rc2 Rc7 19. Rfc1 Rfc8 20. h3 g5 21. Bd2 Kf8 22. Ba5 b6 23. Bb4 f5 24. b3 h5 25. Rd1 Nc5 26. Rcd2 Kf7 27. Nc2 g4 28. Nd4 Ned7 29. Bc3 Nf6 30. f3 Rg8 31. hxg4 hxg4 32. Kf2 b5 33. cxb5 Nxb3 34. axb3 Rxc3 35. bxa6 d5 36. Rc2 Rxc2 37. Nxc2 Bc5+ 38. Ke1 gxf3 39. Bxf3 Rxg3 40. b4 Ba7 41. Kd2 Rg8 42. Na3 Rb8 43. Rc1 Ne8 $4 44. Bh5+ Kf6 45. Bxe8 Rxe8 46. Rc7 Ra8 47. b5 Ke5 48. Rc6 Rb8 49. Kc3 f4 50. Kb4 Be3 51. Ka5 Bd2+ 52. Ka4 Be3 53. Nc2 d4 54. Nb4 Rh8 55. b6 Kf5 56. Nd3 e5 57. b7 e4 58. a7 exd3 59. exd3 1-0

Is it fine if I use the examples (citing the original source) in the blunders course I'm creating?

Thanks Max, a really nice Hedgehog game! Surya has beaten up many Australians (including myself twice)...
Yes, feel free - you can use mine at least :)

I have one, it remained unseen by us both though. I can post it later if I don't forget

@Jisu101 said ^

I have one, it remained unseen by us both though. I can post it later if I don't forget

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. Nc3 Qd6 5. Bc4 c6 6. d3 Bg4 7. Be3 e6 8. d4 Be7 9. h3 Bh5 10. Qe2 O-O 11. g4 Bg6 12. Ne5 Nbd7 13. Nxg6 hxg6 14. h4 Nd5 15. Ne4 Qb4+ 16. c3 Qa5 17. g5 f5

And here... 18. h5??
But my opponent played 18...Kf7?? (Capturing the sacrificed knight was correct because black has ...Rf3!! blocking off the white queen's path)

19. Bxd5 Qxd5 20. Ng3 Bd6 21. Rh4 Rh8 22. O-O-O gxh5 23. g6+ Kxg6 24. Rxh5 Nf6 25. Rg5+ Kf7 26. Nh5 Nxh5 27. Rxh5 g6 28. Rg5 Be7 29. Rgg1 Rag8 30. Bg5 Bxg5+ 31. Rxg5 Rh1 32. Rxh1 Qxh1+ 33. Kc2 Kf6 34. f4 Qe4+ 35. Qxe4 fxe4 36. Re5 Rh8 37. Kd2 Rh2+ 38. Ke3 Rxb2 39. Ra5 a6 40. Kxe4 Rb5 41. Ra4 Rh5 42. Rc4 Ra5 43. a4 b5 44. axb5 cxb5 45. Rc6 Ra1 46. Rb6 Ke7 47. d5 Re1+ 48. Kd4 Rd1+ 49. Ke4 exd5+ 50. Ke5 Rd3 51. Rxa6 Rxc3 52. Kxd5 Rf3 53. Rxg6 Rxf4
    Draw agreed.

@datajunkie

i was winning higher rated player and i played h5
i have had much worse losses this was just the beginning and the only one i could find there are blunders i have made and regretted for 2 years (till now) (i am only 12 and started chess 2.5 years ago)so 2 years is a long time got a chance to win and blundered a bishop lost

i dont remember the exact position it was something like this higher rated player best in my academy rated tournament imagine the rating i would have got 2 years ago i got a tactic and got this position (similar) and here i played Rc2 he took my bishop and won easily 2 pawns up .
otb fide and more than the rating the proud feeling that i can tell anyone that i beat him

@Jisu101 said ^

I have one, it remained unseen by us both though. I can post it later if I don't forget

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. Nc3 Qd6 5. Bc4 c6 6. d3 Bg4 7. Be3 e6 8. d4 Be7 9. h3 Bh5 10. Qe2 O-O 11. g4 Bg6 12. Ne5 Nbd7 13. Nxg6 hxg6 14. h4 Nd5 15. Ne4 Qb4+ 16. c3 Qa5 17. g5 f5

And here... 18. h5??
But my opponent played 18...Kf7?? (Capturing the sacrificed knight was correct because black has ...Rf3!! blocking off the white queen's path)

19. Bxd5 Qxd5 20. Ng3 Bd6 21. Rh4 Rh8 22. O-O-O gxh5 23. g6+ Kxg6 24. Rxh5 Nf6 25. Rg5+ Kf7 26. Nh5 Nxh5 27. Rxh5 g6 28. Rg5 Be7 29. Rgg1 Rag8 30. Bg5 Bxg5+ 31. Rxg5 Rh1 32. Rxh1 Qxh1+ 33. Kc2 Kf6 34. f4 Qe4+ 35. Qxe4 fxe4 36. Re5 Rh8 37. Kd2 Rh2+ 38. Ke3 Rxb2 39. Ra5 a6 40. Kxe4 Rb5 41. Ra4 Rh5 42. Rc4 Ra5 43. a4 b5 44. axb5 cxb5 45. Rc6 Ra1 46. Rb6 Ke7 47. d5 Re1+ 48. Kd4 Rd1+ 49. Ke4 exd5+ 50. Ke5 Rd3 51. Rxa6 Rxc3 52. Kxd5 Rf3 53. Rxg6 Rxf4
    Draw agreed.

@datajunkie

Thanks, I added to the study. Pretty cool that Black's only move is ...Rf3, otherwise White wins!

Hi!I have a game where I made 2 brilliant moves and my most memorable blunder ever(my elo is pretty low,this explains the crazy amount of mistakes.Although there are many mistakes made by both players,move Here is the commented PGN:
[Event "?"]
[Site "?"]
[Date "2026.03.06"]
[Round "5"]
[White "NN"]
[Black "David Weisberg"]
[Result "1-0"]
[Link "https://www.chess.com/analysis/collection/oyunlarim-3BBvSkVr6/4hX2gJ23GA/analysis?move=38"]

1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 e6 5. Nc3 Bb4 $6 6. Nf3 d5 7. e5 Nge7 8. a3
   Ba5 9. Be2 $6 O-O 10. O-O f6 $2 11. exf6 Rxf6 12. Bg5 Rf8 13. Qc2 $2 Qe8 14. Bd3 $2 Qh5
   $9 15. h3 $9 Rxf3 $3 {First brilliant move.Both brilliants have the same logic:Two light figures are
   stronger than the rook} 16. Bxe7 Rxd3 $3 17. Qxd3 Nxe7 18. Rfe1 Bd7 19. b4 Bb6
2. a4 a6 21. a5 Ba7 22. b5 Rc8 23. b6 Bb8 24. Na4 Qf5 $6 25. Qxf5 Nxf5 26. Nc5
   Bc6 27. Nxe6 Bd7 28. Rad1 Bxe6 29. Rxe6 Nxd4 $2 (29... Kf7 30. Rde1) 30. Re7 $9 Nb3
   $9 (30... Nc6 31. Rxb7 d4 32. Rc1 (32. g3) 32... d3 33. g3 d2 34. Rd1) 31. Rxb7
   Nxa5 $2 {My most memorable blunder:Either Rd8 or Nc5 saves the game.} 32. Rd7 Be5 $2
3. R7xd5 Nc6 34. Rb1 $2 Rd8 $2 35. Rc5 $1 Rd6 36. b7 Rf6 37. Rxe5 1-0

@kalsontil213 said ^

i dont remember the exact position it was something like this higher rated player best in my academy rated tournament imagine the rating i would have got 2 years ago i got a tactic and got this position (similar) and here i played Rc2 he took my bishop and won easily 2 pawns up .
otb fide and more than the rating the proud feeling that i can tell anyone that i beat him

Hello, thanks for sharing, I've added both to the study.
You are still very young, just keep playing strong tournaments and work on your chess and these should become memories you can smile at.

@Weisberg3811 said ^

Hi!I have a game where I made 2 brilliant moves and my most memorable blunder ever(my elo is pretty low,this explains the crazy amount of mistakes.Although there are many mistakes made by both players,move Here is the commented PGN:
[Event "?"]
[Site "?"]
[Date "2026.03.06"]
[Round "5"]
[White "NN"]
[Black "David Weisberg"]
[Result "1-0"]
[Link "https://www.chess.com/analysis/collection/oyunlarim-3BBvSkVr6/4hX2gJ23GA/analysis?move=38"]

1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 e6 5. Nc3 Bb4 $6 6. Nf3 d5 7. e5 Nge7 8. a3
   Ba5 9. Be2 $6 O-O 10. O-O f6 $2 11. exf6 Rxf6 12. Bg5 Rf8 13. Qc2 $2 Qe8 14. Bd3 $2 Qh5
   $9 15. h3 $9 Rxf3 $3 {First brilliant move.Both brilliants have the same logic:Two light figures are
   stronger than the rook} 16. Bxe7 Rxd3 $3 17. Qxd3 Nxe7 18. Rfe1 Bd7 19. b4 Bb6
2. a4 a6 21. a5 Ba7 22. b5 Rc8 23. b6 Bb8 24. Na4 Qf5 $6 25. Qxf5 Nxf5 26. Nc5
   Bc6 27. Nxe6 Bd7 28. Rad1 Bxe6 29. Rxe6 Nxd4 $2 (29... Kf7 30. Rde1) 30. Re7 $9 Nb3
   $9 (30... Nc6 31. Rxb7 d4 32. Rc1 (32. g3) 32... d3 33. g3 d2 34. Rd1) 31. Rxb7
   Nxa5 $2 {My most memorable blunder:Either Rd8 or Nc5 saves the game.} 32. Rd7 Be5 $2
3. R7xd5 Nc6 34. Rb1 $2 Rd8 $2 35. Rc5 $1 Rd6 36. b7 Rf6 37. Rxe5 1-0

Thanks for sharing, interesting game - added to the study.
To be fair your ...Nxa5 looks pretty natural, not easy to find the best moves around there!