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Compiled by Korora

Someone loses the game because they made a slip, had distractions to deal with, or otherwise goofed. Most (but by no means all) of the games here are short.

See also Game Collection: Oops! and Game Collection: What in the foggy blue morning?

Greco vs NN, 1620 
(D20) Queen's Gambit Accepted, 6 moves, 1-0

Even when playing against NN, don't check reflexively.
J Wilson vs NN, 1795 
(C37) King's Gambit Accepted, 11 moves, 0-1

The immortal patzer NN blunders into a Q-sac mate.
NN vs Du Mont, 1802 
(A02) Bird's Opening, 6 moves, 0-1

The Immortal Patzer basically ceded R & B when given Q-odds.
Cochrane vs NN, 1832 
(000) Chess variants, 14 moves, 1-0

29 ... Black to move and grab defeat from the jaws of victory.
Staunton vs Anderssen, 1851 
(C54) Giuoco Piano, 30 moves, 1-0

7. ...Qd7?? 8. Qxb7 ZIP-POW!
Kolisch vs E Geake, 1860 
(C41) Philidor Defense, 9 moves, 1-0

Touch-move trouble
Wiede vs A Goetz, 1880 
(C33) King's Gambit Accepted, 7 moves, 0-1

In that position, pinning the Q was a TERRIBLE idea.
Tarrasch vs B Richter, 1883 
(A84) Dutch, 20 moves, 0-1

4 ...Qh4 and 5 ...Nf6?
P Frazer vs Taubenhaus, 1888 
(C45) Scotch Game, 8 moves, 1-0

The winner is the one who blunders second-to-last.
J M Hanham vs Chigorin, 1889  
(C53) Giuoco Piano, 30 moves, 0-1

32. Bb4?? blunders the match away.
Chigorin vs Steinitz, 1892 
(C34) King's Gambit Accepted, 32 moves, 0-1

Illegal move by accident? Make a King move, then.
Lindemann vs Echtermeyer, 1893  
(B01) Scandinavian, 3 moves, 0-1

"Oh Minty, Minty, Minty!"
Pillsbury vs E Chatard, 1900 
(B02) Alekhine's Defense, 16 moves, 1-0

Next time try d4, THEN f3!
B R vs A Wagner, 1902 
(C33) King's Gambit Accepted, 5 moves, 0-1

Resigning when on the verge of winning
Von Popiel vs G Marco, 1902 
(C41) Philidor Defense, 36 moves, 1-0

Don't go poaching crows while leaving the King unprotected.
Rodzynski vs Alekhine, 1913 
(C41) Philidor Defense, 15 moves, 0-1

Who are you and what have you done with Capablanca!?
Capablanca vs A Kramer, 1914 
(C26) Vienna, 9 moves, 0-1

And another King-move-for-illegal-move sub.
L Palau vs S Kalabar, 1927 
(E11) Bogo-Indian Defense, 5 moves, 1-0

Single-P-pushing w/out piece development is wood-pushing.
F Bethge vs Legal, 1930 
(C21) Center Game, 12 moves, 1-0

Don't get your Queen trapped like this!
J Cukierman vs NN, 1934 
(B00) Uncommon King's Pawn Opening, 6 moves, 1-0

E Pedersen vs A Zografakis, 1950 
(B71) Sicilian, Dragon, Levenfish Variation, 10 moves, 1-0

5 ...Nd7?????
Keres vs E Arlamowski, 1950 
(B10) Caro-Kann, 6 moves, 1-0

Crazy Horse
V Borsony vs A Laustsen, 1956 
(B70) Sicilian, Dragon Variation, 7 moves, 1-0

8. ...c6? Did you forget to say "J'adoube"?
N Speijer vs Couvee, 1955 
(C14) French, Classical, 15 moves, 1-0

Falling for blatant sacs
Reshevsky vs Z Margalit, 1958 
(E42) Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein), 9 moves, 0-1

Abracadabra--Q disappears!
Korchnoi vs Bronstein, 1959 
(D51) Queen's Gambit Declined, 32 moves, 1-0

Borg Defense, Butterfingers Variation
W T Mayfield vs W R Trinks, 1959 
(B00) Uncommon King's Pawn Opening, 3 moves, 1-0

Win the Bishop, lose the King.
Filip vs K Darga, 1961 
(A14) English, 33 moves, 0-1

Playing the Stonewall? Guard h5, lest your stone be 100% talc!
G Pfeiffer vs S Batlouni, 1960 
(D31) Queen's Gambit Declined, 8 moves, 1-0

I'll take with the Q; it's not like that P's guarded or--Oops!
S Noorda vs Timman, 1964 
(C02) French, Advance, 9 moves, 1-0

Yes, your opponent blundered, but still, not everything wins.
J Emma vs Stein, 1966 
(B50) Sicilian, 48 moves, 1/2-1/2

NN commits identity theft against Bobby Fischer.
Najdorf vs Fischer, 1966 
(E75) King's Indian, Averbakh, Main line, 31 moves, 1-0

Missed the forced mate needed to escape one
M Burkett vs D Fritzinger, 1969 
(C23) Bishop's Opening, 27 moves, 0-1

Unguarding the checkmate square
Barney vs Mccrum, 1969 
(A02) Bird's Opening, 5 moves, 0-1

Forgot he didn't have to worry about his opponent castling.
Tal vs Larsen, 1969 
(B04) Alekhine's Defense, Modern, 50 moves, 0-1

Don't lead with the lady in the Ruy!
D Smith vs B Wall, 1971 
(C65) Ruy Lopez, Berlin Defense, 12 moves, 0-1

If that was checkmate, I'm Bobby Fischer!
Reshevsky vs Savon, 1973 
(A77) Benoni, Classical, 9...Re8, 10.Nd2, 40 moves, 0-1

Queen moved too soon
K Kusin vs J Varfolomeev, 1973 
(A00) Uncommon Opening, 4 moves, 0-1

"You! Didn't! Even! Show! UP!"
K Grigorian vs Savon, 1973 
(A00) Uncommon Opening, 1 moves, 1-0

Get the Q out of danger; don't just guard her!
Chaos vs Bs6676, 1977 
(D08) Queen's Gambit Declined, Albin Counter Gambit, 24 moves, 1-0

The OTHER castle!
G Morrison vs G Chandler, 1978 
(A01) Nimzovich-Larsen Attack, 16 moves, 0-1

Don't castle onto a pawnless side!
Carta vs Cassano, 1980 
(C35) King's Gambit Accepted, Cunningham, 7 moves, 0-1

Don't P-grab with a piece already moved 2x in the opening!
Carta vs Scarpata, 1980 
(B50) Sicilian, 8 moves, 1-0

34. ... Black to play and get his own Q ensnared
S Polgar vs Z Kiss, 1980 
(E87) King's Indian, Samisch, Orthodox, 36 moves, 1-0

Grob Opening, Oops Variation.
L Darling vs R Wood, 1983 
(A00) Uncommon Opening, 2 moves, 0-1

External distractions!
K Shirazi vs J Peters, 1984 
(B20) Sicilian, 5 moves, 0-1

b4 the storm
Short vs Chiburdanidze, 1985 
(B72) Sicilian, Dragon, 31 moves, 0-1

This was an easy win, right?
Kasparov vs K Georgiev, 1988 
(A29) English, Four Knights, Kingside Fianchetto, 78 moves, 1/2-1/2

5 ...Bf5??
A Zapata vs Anand, 1988 
(C42) Petrov Defense, 6 moves, 1-0

Snatch a Pawn, lose pieces.
J Gallagher vs Miles, 1990 
(C28) Vienna Game, 11 moves, 0-1

Really shouldn't have pushed the g-Pawn there.
Van Kessel vs Rensen, 1990 
(A03) Bird's Opening, 3 moves, 0-1

Walked into a family fork
B Wall vs K Saint Amant, 1991 
(B21) Sicilian, 2.f4 and 2.d4, 10 moves, 1-0

An error even the Immortal Patzer knows how to exploit
NN vs E Fossan, 1991 
(C42) Petrov Defense, 5 moves, 1-0

Lost on time just as he was reaching to deliver mate.
A Ivanov vs Yermolinsky, 1993 
(B57) Sicilian, 37 moves, 0-1

Make sure you read the correspondence correctly.
P A Boll vs F Baumbach, 1994 
(B32) Sicilian, 10 moves, 1-0

That P and that N were both poisoned!
P Dosoudil vs J Kuchta, 1995 
(C56) Two Knights, 11 moves, 0-1

Got too greedy on the 28th move
P Kubala vs J Stocek, 1997
(B51) Sicilian, Canal-Sokolsky (Rossolimo) Attack, 28 moves, 0-1

See footage of Kasparov reacting after his blunder on move 33.
Anand vs Kasparov, 1996 
(B90) Sicilian, Najdorf, 54 moves, 1-0

Fingerfehler costs Q and R
M Mankinen vs J Gronemann, 1999 
(B01) Scandinavian, 9 moves, 1-0

Throwing away the B that guarded against mate.
M Gurevich vs Serper, 2000 
(A21) English, 47 moves, 1-0

Misses a chance to mate in 1, then loses game.
Z Gofshtein vs M Gurevich, 2001 
(C11) French, 39 moves, 1-0

Repeating a classic blunder move-for-move
O Bjarnason vs V Dittler, 2001 
(A00) Uncommon Opening, 7 moves, 1-0

7. ... Kg8??
R Maidana vs P Goette, 2001 
(C57) Two Knights, 10 moves, 1-0

Leaving the Q hanging
Pg Hj Jaafar Pg Omar Baki vs M Ismail, 2001 
(D06) Queen's Gambit Declined, 8 moves, 1-0

Move your PAWNS!
I Penko vs Jernej Novak, 2001 
(A04) Reti Opening, 10 moves, 0-1

Pawn-snatching again
G Putzbach vs M Kopylov, 2001 
(B05) Alekhine's Defense, Modern, 36 moves, 1-0

69. Kf4?????
Beliavsky vs L E Johannessen, 2002 
(D58) Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst, 69 moves, 0-1

Overlooked PxQ
Topalov vs Karpov, 2002 
(B17) Caro-Kann, Steinitz Variation, 29 moves, 0-1

Walking into a catastrophic fork of loose pieces
R Sander vs Carlsen, 2002 
(C01) French, Exchange, 29 moves, 0-1

Pawn-grabbing the Queen and King away
S Titova vs D Koveshnikova, 2002 
(B21) Sicilian, 2.f4 and 2.d4, 10 moves, 1-0

Both sides missed 51. Qh7#
F Bellini vs V Gashimov, 2002 
(B30) Sicilian, 75 moves, 1/2-1/2

Mouse malfunction on move 20
M Pavlovic vs M Umansky, 2003 
(B00) Uncommon King's Pawn Opening, 20 moves, 0-1

Blowing the chance to stop passed Pawns.
B Finegold vs Kaidanov, 2003 
(D45) Queen's Gambit Declined Semi-Slav, 54 moves, 0-1

Remember to turn off your cellphone before the game!
E Agrest vs Ponomariov, 2003 
(A15) English, 28 moves, 1-0

Throwing the Rook away in the endgame
Short vs Krasenkow, 2004 
(B33) Sicilian, 122 moves, 0-1

That Knight was pinned!
J Radovanovic vs M Quinn, 2004 
(B23) Sicilian, Closed, 40 moves, 0-1

19. ... Rfd8? "Really sophisticated idiots," as Thete said.
P Lafuente vs Shredder, 2005 
(E32) Nimzo-Indian, Classical, 52 moves, 1-0

Another case of moving the Q into the line of fire.
L Bruzon Batista vs Krasenkow, 2005 
(B40) Sicilian, 64 moves, 1-0

When pushing the passed Pawn is woodpushing
Carlsen vs M Gagunashvili, 2006 
(B48) Sicilian, Taimanov Variation, 65 moves, 0-1

Blundering away the Queen and King
Aronian vs Svidler, 2006 
(D80) Grunfeld, 24 moves, 0-1

Q chases Q to checkmate
Deep Fritz vs Kramnik, 2006 
(D20) Queen's Gambit Accepted, 35 moves, 1-0

I'll just give a check. What could go wrong?
K Urban vs Naiditsch, 2007 
(A15) English, 50 moves, 1-0

King Bluebeard?
D Reinderman vs C S Matamoros Franco, 2008 
(C25) Vienna, 37 moves, 1-0

Shouldn't have accepted that Q sac.
O C Moen vs A Livner, 2008 
(B48) Sicilian, Taimanov Variation, 24 moves, 1-0

"Why don't you use your Horse sense?"
A Accouche vs S Howell, 2008 
(C45) Scotch Game, 7 moves, 0-1

Can't identify just one blunder here.
Niloofar Nayab vs C Carrero, 2008 
(A40) Queen's Pawn Game, 29 moves, 0-1

Upstairs, downstairs, and on my lady's flight square.
Shulman vs B Savchenko, 2009 
(E15) Queen's Indian, 25 moves, 0-1

Blundered into a K & Q fork
A Deviatkin vs V Meijers, 2009
(E00) Queen's Pawn Game, 39 moves, 1-0

So much time on early moves that time panic set in 22 moves in.
Grischuk vs Gelfand, 2010 
(D44) Queen's Gambit Declined Semi-Slav, 32 moves, 0-1

"I just don't know what went wrong!"
S van de Venter vs A Kromhout, 2011 
(A40) Queen's Pawn Game, 5 moves, 0-1

44. QxB??
M Pichette vs M Leutschaft, 2011 
(A58) Benko Gambit, 44 moves, 0-1

Should have played 9. Re1
Bill Gates vs Carlsen, 2014 
(B00) Uncommon King's Pawn Opening, 9 moves, 0-1

87. ... Ke7 illegal move forfeit
Nakamura vs B Savchenko, 2014 
(C00) French Defense, 87 moves, 1-0

White proceeded to blunder the Q away instead of 57 b6#.
D Daulyte-Cornette vs M Socko, 2015 
(C03) French, Tarrasch, 56 moves, 0-1

Hung the Knight out to dry
Kasparov vs So, 2016 
(B40) Sicilian, 41 moves, 0-1

The Q was right to retreat, but not to there!
Nakamura vs Carlsen, 2016 
(E15) Queen's Indian, 22 moves, 0-1

Not as far as intended.
R Antonio vs A Reprintsev, 2017 
(B01) Scandinavian, 3 moves, 1-0

Must have dropped the Bishop by accident.
E Abdrlauf vs K Holm, 2018 
(B27) Sicilian, 14 moves, 0-1

Throwing away a Knight right off the bat
Sigurdur Eiriksson vs E Fjallheim, 2018 
(D02) Queen's Pawn Game, 6 moves, 1-0

11. ... Qe7?
V Fedoseev vs Bologan, 2018 
(E12) Queen's Indian, 23 moves, 1-0

100 games

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