100...Kg5??? And what about the rook on a1?

P H Nielsen vs Karjakin, 2005

(D44) Queen's Gambit Declined Semi-Slav, 101 moves, 1-0

Spassky losing his knight by Scholar´s Mate threat

H Lieb vs Spassky, 1979

(C26) Vienna, 24 moves, 1-0

Bb4? Self-mate by Chigorin.

Chigorin vs Steinitz, 1892

(C34) King's Gambit Accepted, 32 moves, 0-1

Trapped Queen

Nunn vs Kiril D Georgiev, 1988

(B17) Caro-Kann, Steinitz Variation, 42 moves, 1-0

S*** happens - particularly if the game is blindfolded

Karpov vs Sadler, 1998

(A06) Reti Opening, 13 moves, 0-1

Again Chigorin!

Chigorin vs Steinitz, 1889

(C52) Evans Gambit, 26 moves, 0-1

One more self-mate

Karpov vs Bareev, 1994

(C07) French, Tarrasch, 36 moves, 1-0

Karpov in a bad mood

L Christiansen vs Karpov, 1993

(E12) Queen's Indian, 12 moves, 1-0

Mate?No, just a queen loss

Reshevsky vs Savon, 1973

(A77) Benoni, Classical, 9...Re8, 10.Nd2, 40 moves, 0-1

One more queen

Kramnik vs Shirov, 2001

(E94) King's Indian, Orthodox, 14 moves, 1-0

Was Anand drunk?????

A Zapata vs Anand, 1988

(C42) Petrov Defense, 6 moves, 1-0

And Short self-mates himself

Short vs Beliavsky, 1992

(C48) Four Knights, 58 moves, 0-1

Three big blunders in one game between two great players

Kramnik vs Topalov, 2005

(B80) Sicilian, Scheveningen, 34 moves, 0-1

24..cxd5?, 25..bxd5?

Karpov vs Kasparov, 1990

(E87) King's Indian, Samisch, Orthodox, 29 moves, 1-0

Missed fork

Adams vs Leko, 1996

(A45) Queen's Pawn Game, 31 moves, 1-0

Poor Katy... :-(

Lagno vs Areshchenko, 2003

(B90) Sicilian, Najdorf, 30 moves, 0-1

Wth happened to Karjakin here?

Karjakin vs T L Petrosian, 2005

(B09) Pirc, Austrian Attack, 21 moves, 0-1

Qf8?? Probably the most fatal blunder in Carlsen's career

Carlsen vs Bareev, 2005

(B12) Caro-Kann Defense, 46 moves, 0-1

A one-move-blundered Queen at GM level? Yes!!!

L Bruzon Batista vs Krasenkow, 2005

(B40) Sicilian, 64 moves, 1-0

Magnus? It can't be true!

Carlsen vs M Gagunashvili, 2006

(B48) Sicilian, Taimanov Variation, 65 moves, 0-1

Petrosian

Petrosian vs Bronstein, 1956

(E66) King's Indian, Fianchetto, Yugoslav Panno, 36 moves, 0-1

Qxa2??

Larsen vs Najdorf, 1968

(A01) Nimzovich-Larsen Attack, 39 moves, 0-1

Qf8??

Kasparov vs Kramnik, 1994

(B33) Sicilian, 36 moves, 1-0

24.exd4??

Aronian vs Svidler, 2006

(D80) Grunfeld, 24 moves, 0-1

Mate in ONE

Deep Fritz vs Kramnik, 2006

(D20) Queen's Gambit Accepted, 35 moves, 1-0

Ehrm, Pari, wasn't it mate? And what did Rg1 mean at all?

Negi vs Lagno, 2006

(C78) Ruy Lopez, 39 moves, 1/2-1/2

Lost Draw

Carlsen vs Topalov, 2007

(D45) Queen's Gambit Declined Semi-Slav, 64 moves, 1-0

Rf1??

K Urban vs Naiditsch, 2007

(A15) English, 50 moves, 1-0

Bent Larsen

S Giardelli vs Larsen, 2004

(A47) Queen's Indian, 21 moves, 1-0

A mistake which he won't make in the next 70 years?

Portisch vs Spassky, 2007

(A95) Dutch, Stonewall, 25 moves, 1-0

Spassky III

Spassky vs Karpov, 1988

(B17) Caro-Kann, Steinitz Variation, 22 moves, 0-1

Mate in 1 missed by both players.

F Bellini vs V Gashimov, 2002

(B30) Sicilian, 75 moves, 1/2-1/2

Bd6??

Motylev vs Carlsen, 2007

(C95) Ruy Lopez, Closed, Breyer, 35 moves, 0-1

Qxh5 makes it complete

D Donchev vs Topalov, 1989

(C04) French, Tarrasch, Guimard Main line, 19 moves, 1-0

Kasparov

Anand vs Kasparov, 1996

(B90) Sicilian, Najdorf, 54 moves, 1-0

Kamsky vs Shirov, 2007

(D00) Queen's Pawn Game, 29 moves, 0-1

Short vs Chiburdanidze, 1985

(B72) Sicilian, Dragon, 31 moves, 0-1

stalemate

Kasparov vs Kiril D Georgiev, 1988

(A29) English, Four Knights, Kingside Fianchetto, 78 moves, 1/2-1/2

stalemate 2

Karpov vs Judit Polgar, 1998

(E60) King's Indian Defense, 75 moves, 1/2-1/2

Blundering Thrice (black 28, white 30, white 37)

Ivanchuk vs Aronian, 2008

(C84) Ruy Lopez, Closed, 60 moves, 0-1

Ke5?? Some say worst, but game #1 is much worse:)

Carlsen vs Shirov, 2008

(C78) Ruy Lopez, 80 moves, 1-0

Queen

Bacrot vs E Inarkiev, 2008

(C69) Ruy Lopez, Exchange, Gligoric Variation, 23 moves, 0-1

Morozevich vs Gelfand, 2009

(C24) Bishop's Opening, 31 moves, 1-0

Helpmate in one

Beliavsky vs L E Johannessen, 2002

(D58) Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst, 69 moves, 0-1

A blunder by a computer!

P Lafuente vs Shredder, 2005

(E32) Nimzo-Indian, Classical, 52 moves, 1-0

Moves 59+

J Zawadzka vs E Paehtz, 2010

(B12) Caro-Kann Defense, 64 moves, 1/2-1/2

One-move blunder on move 11

Stripunsky vs Onischuk, 2012

(B11) Caro-Kann, Two Knights, 3...Bg4, 11 moves, 0-1

One-move blundered queen (black's 34th, the opponent misses it)

J Emma vs Stein, 1966

(B50) Sicilian, 48 moves, 1/2-1/2

Mate in two missed by both

Rubinstein vs Nimzowitsch, 1912

(A55) Old Indian, Main line, 50 moves, 1-0

Szabo vs Reshevsky, 1953

(D42) Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3, 27 moves, 1/2-1/2

Kramnik vs Wang Hao, 2013

(D16) Queen's Gambit Declined Slav, 26 moves, 1-0