Here are two examples from games with slow time controls (90 minutes initially + 30 seconds per moves). Therefore I guess the moves in question are not a result of time trouble. I can't deny that the PGN is confused, but see yourself:

- Code: Select all
`[Event "XXXV Open"]`

[Site "La Roda ESP"]

[Date "2008.03.22"]

[Round "6"]

[White "Sanchez, Joseph"]

[Black "Corrales Jimenez, F"]

[Result "0-1"]

[WhiteElo "2492"]

[BlackElo "2509"]

[ECO "B80"]

[EventDate "2008.03.19"]

[Annotator " Glaurung 2.0.1"]

[TimeControl "5400+30"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e6 7.Qd2 b5 8.O-O-O

{ Move out of book ( f3 100%)}

8...b4 9.Na4 Qa5 10.b3 Nxe4 11.Qd3 Bb7 12.f3 Nc3 13.Nxc3 bxc3 14.Kb1 Nd7

15.Ne2 Rc8 16.Bd4 Ne5 17.Bxe5 $201 dxe5 $4 $18 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-1.66 / +327.00}

( 17...Qxe5 18.f4 Qc5 19.Qd4 d5 20.h4 a5 21.Qxc5 Rxc5 22.Rd3 Bd6 23.

Rhh3 Ke7 24.Rxc3 Rxc3 25.Rxc3 h5 26.g3 $17 )

18.g3 $4 $17 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

+327.00 / -2.45}

( 18.Qd7# $18 )

18...Be7 $4 $18 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-2.45 / +3.86}

( 18...Bd5 19.Qe3 Bb4 20.Rd3 f6 21.h4 O-O 22.Bh3 Rfd8 23.Rhd1 Rc6 24.

Bg4 Bc5 25.Qc1 Bd6 $17 )

19.Bh3 $4 $17 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

+3.86 / -2.88}

( 19.Qd7+ Kf8 20.Qxb7 Re8 21.Rd3 h5 22.h4 g5 23.hxg5 Bxg5 24.a4 Rd8

25.Rxd8+ Bxd8 26.Qc8 Qc7 27.Qxa6 Bg5 28.Qa8+ Kg7 $18 )

19...Qc5 $4 $18 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-2.88 / +3.29}

( 19...O-O 20.Qe3 Bd8 21.Rhf1 Bb6 22.Qg5 Rfd8 23.Rxd8+ Bxd8 24.Qe3 Bb6

25.Qg5 Qa3 26.Qc1 Qe7 27.Bg4 $17 )

20.Rhe1 $4 $17

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

+3.29 / -2.49}

( 20.Qd7+ Kf8 21.Qxb7 Qc6 22.Qxc6 Rxc6 23.Rd3 f5 24.Nxc3 Kf7 25.Kb2

Rhc8 26.Re1 Bb4 27.Ree3 Rd6 28.a3 Rxd3 29.Rxd3 $18 )

20...O-O $201 21.Ka1 $2 $19

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-2.88 / -4.58}

( 21.Qxc3 Qf2 22.Qxe5 Bf6 23.Qf4 Qxh2 24.Qb4 Bxf3 25.Bg4 a5 26.Qf4 Bc6

27.Qe3 Rcd8 28.Bf3 $17 )

21...Qa3 $201 22.Rb1 $2 $19

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-3.43 / -5.84}

( 22.Nxc3 Rfd8 23.Qe3 Qb4 24.Kb2 Rd4 25.Na4 Bxf3 26.Bxe6 Qa3+ 27.Kb1

Rxa4 28.bxa4 Qxe3 29.Rxe3 Rb8+ 30.Kc1 Bxd1 31.Kxd1 fxe6 32.Rxe5 $19 )

22...Rc5 $201 23.b4 $2 $19

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-5.07 / -6.96}

( 23.Nc1 Bg5 24.f4 exf4 25.b4 Rd5 26.Rb3 Qa4 27.Qf3 Rb5 28.Qg4 fxg3

29.Qxg3 Bd2 30.Rf1 Rxb4 $19 )

23...Bd5 0-1

[diag]2r1kb1r/1b3ppp/p3p3/q3p3/8/1PpQ1P2/P1P1N1PP/1K1R1B1R w k - 0 18[/diag]

2r1kb1r/1b3ppp/p3p3/q3p3/8/1PpQ1P2/P1P1N1PP/1K1R1B1R w k - 0 18

after 17...dxe5??

Is that usual that two players of that level don't see a mate in one?

Here anthoer games with a a whole series of blunders in a row:

- Code: Select all
`[Event "31st San Sebastian Open"]`

[Site "Donostia ESP"]

[Date "2008.03.22"]

[Round "8"]

[White "Mateo, Ra"]

[Black "San Segundo Carrillo, P"]

[Result "0-1"]

[WhiteElo "2484"]

[BlackElo "2542"]

[ECO "B14"]

[EventDate "2008.03.16"]

[Annotator " Glaurung 2.0.1"]

[TimeControl "5400+30"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Bf4

{ Move out of book ( Nf3 97% c5 1% cxd5 1% a3 1% Bg5 0%)}

6...Bb4 7.Bd3 dxc4 8.Bxc4 O-O 9.Ne2 a6 10.a3 Be7 11.Qd3 b5 12.Qf3 Ra7 13.

Bd3 Rd7 14.Rd1 Bb7 15.Qh3 Nc6 16.O-O g6 17.Be5 Nxe5 18.dxe5 Nd5 19.Nxd5

Bxd5 20.Nd4 $201 Bc4 $2 $10 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-1.60 / +0.19}

( 20...Bxg2 21.Qxg2 Rxd4 22.Be2 Bh4 23.b3 Qb6 24.Qf3 Rxd1 25.Rxd1 f6

26.Qf4 Bg5 27.Qd4 Qxd4 28.Rxd4 fxe5 $17 )

21.Qf3 $4 $19 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

+0.19 / -4.68}

( 21.Nc6 Rxd3 22.Rxd3 Qxd3 23.Nxe7+ Kg7 24.Qxd3 Bxd3 25.Rd1 Be2 26.Rd6

Re8 27.Nc6 Ra8 28.Nd4 Bc4 29.f4 Bd5 30.Kf2 $10 )

21...Bb3 $4 $18 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-4.68 / +4.09}

( 21...Rxd4 22.Bxc4 bxc4 23.Qe2 Bc5 24.Rxd4 Bxd4 25.Qxc4 Bxe5 26.b4

Qd6 27.g3 Rd8 28.Re1 Bd4 29.Rc1 Qb6 30.Qe2 $19 )

22.Rc1 $4 $19 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

+4.09 / -5.19}

( 22.Nxb3 Qc7 23.Qg3 Rfd8 24.Rc1 Qb7 25.Be2 Rc7 26.Rxc7 Qxc7 27.Rc1

Qb6 28.Bf3 b4 29.axb4 Bxb4 $18 )

22...Bg5 $4 $17 $201

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-5.19 / -1.86}

( 22...Rxd4 23.Be2 Bd5 24.Qc3 Rf4 25.Rfd1 Qb6 26.Qe3 Qxe3 27.fxe3 Re4

28.Bf3 Rxe5 29.Bxd5 exd5 30.Kf2 Kg7 $19 )

23.Be4 $4 $19

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-1.86 / -5.68}

( 23.Rc3 Bd5 24.Qg4 Bxg2 25.Nxe6 fxe6 26.Kxg2 Bd2 27.Qxe6+ Kh8 28.Be4

Bxc3 29.bxc3 Re8 30.Qxa6 Qg5+ 31.Kh1 Qxe5 $17 )

23...Rxd4 24.Rfe1 $201 Bd5 $19

{ Glaurung 2.0.1: -8.27 (-5.86)}

( 24...Bxc1 25.Rxc1 Qg5 26.Re1 Qxe5 27.Qe3 Bd5 28.Bf3 Qxe3 29.fxe3 Rd2

30.Re2 Rxe2 31.Bxe2 Kg7 32.Kf2 Kf6 $19 )

25.g3 Bxe4 26.Rxe4 $201 Qa8 $19

{ Glaurung 2.0.1: -13.70 (-6.01)}

( 26...Bxc1 27.Re2 Rd2 28.Rxd2 Qxd2 29.b4 Qe1+ 30.Kg2 Qxe5 31.Kg1 Qa1

32.Qd1 Qxa3 33.Qd4 Bb2 34.Qe4 Qa1+ 35.Kg2 Bd4 $19 )

27.Rce1 Rc8 $201 28.h4 $2 $19

{ Glaurung 2.0.1: Analysis reports blunder, with score change from/to:

-5.05 / -6.66}

( 28.Kg2 Qd5 29.R4e2 Qd7 30.h4 Bc1 31.Kh2 a5 32.Kg2 h6 33.Qf6 Rd3 34.

Kg1 Rd1 35.Rf1 $19 )

28...Rcc4 29.hxg5 Rxe4 30.Qg2 $201 Qc6 $19

{ Glaurung 2.0.1: -22.25 (-9.50)}

( 30...Rxe1+ 31.Kh2 Qxg2+ 32.Kxg2 b4 33.axb4 Rxb4 34.b3 Rxb3 35.Kh3 a5

36.Kg2 a4 37.f4 a3 38.Kf2 Ree3 39.Kg2 Rxg3+ 40.Kf2 $19 )

31.Rd1 Rxe5 0-1

Regards

Volker

BTW: Does someone have an idea what this $* output in the PGN means? In Scid annotation symbole are visible instead.