According to SF only human perfect Chess Game ?

[Chessqueen]

There might be other perfect games played by GMs, but I was searching to see if in any world chess championship any game has been played perfectly without any Blunders, but I encounter this on and according to Stockfish and I also replayed it with Komodo Dragon 2.6.1 this game is as close as perfect that you can get played by any Human.

[Ajedrecista]

Hello:

That video features two chess novelties in 1977:

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a) Toth 0 — 1 Perenyi

[pgn][Event "HUN"]
[Site "HUN"]
[Date "1977.??.??"]
[EventDate "?"]
[Round "?"]
[Result "0-1"]
[White "Bela Toth"]
[Black "Bela Perenyi"]
[ECO "C91"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "74"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3
O-O 8.d4 d6 9.c3 Bg4 10.Be3 d5 11.exd5 exd4 12.Bg5 Nxd5
13.Bxd5 Qxd5 14.Bxe7 Bxf3 15.Qxf3 Qxf3 16.gxf3 Rfe8 17.cxd4
Nxe7 18.Nd2 Nf5 19.Nb3 Nh4 20.Rxe8+ Rxe8 21.Rc1 g5 22.f4 gxf4
23.Kf1 Re7 24.Rc3 Kg7 25.Nc5 a5 26.Na6 f3 27.Nxc7 b4 28.Rc1
Re2 29.d5 Nf5 30.Nb5 Rd2 31.a3 Rxd5 32.Nc7 Rd2 33.axb4 axb4
34.Rb1 Nd6 35.Na6 Ne4 36.Nxb4 Rxf2+ 37.Kg1 Rg2+ 0-1[/pgn]

The video says that the novelty is 12. ... Nxd5. In fact, this move is listed with one exclamation mark ('a very good move') at the Fifth Edition of Volume C (year 2006) of the Encyclopedia of Chess Openings (note 42 under ECO C91):

Code: Select all

12. Bg5 Nxd5! 13. Bxd5 Qxd5 14. Bxe7 Bxf3 15. Qxf3 Qxf3 16. gxf3 Rfe8∓ {black has upper hand} J. Tóth — Perényi, Magyarország 1977 — 23/305

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b) Vitolinsh ½ — ½ Gavrikov

[pgn][Event "Ch URS (Farmers)"]
[Site "Kalinin URS"]
[Date "1977.??.??"]
[EventDate "?"]
[Round "?"]
[Result "1/2-1/2"]
[White "Alvis Vitolinsh"]
[Black "Viktor Gavrikov"]
[ECO "B97"]
[WhiteElo "?"]
[BlackElo "?"]
[Source "Rusbase"]
[PlyCount "63"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4
Qb6 8.Qd2 Qxb2 9.Rb1 Qa3 10.f5 Nc6 11.Nxc6 bxc6 12.fxe6 fxe6
13.e5 dxe5 14.Bxf6 gxf6 15.Ne4 Be7 16.Be2 h5 17.Rb3 Qa4
18.Nxf6+ Bxf6 19.c4 Bh4+ 20.g3 Be7 21.O-O Ra7 22.Rb8 Rc7
23.Qd3 Bc5+ 24.Kh1 Ke7 25.Qg6 Kd6 26.Qf6 Re8 27.Bxh5 Rce7
28.Rd1+ Bd4 29.Rxd4+ exd4 30.Qxd4+ Kc7 31.Qb6+ Kd7 32.Qd4+
1/2-1/2[/pgn]

This game is the so claimed 'perfect game according to SF'. The First Edition of Volume B of the Encyclopedia of Chess Openings is from 1975, this is before the game. Let's see how theory of the line looked then:

ECO B97 covered by Efim Geller:

11. Nxc6 was considered 'a mistake' according to note 36:

Code: Select all

11. Nxc6? bxc6 12. fxe6 Bxe6!

12. ... Bxe6 is also mentioned in the video and preferred over the played move 12. ... fxe6.

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OTOH, 11. fxe6 is recomended by this ECO edition and the path of the game is still followed with a transposition:

Code: Select all

10. ... Nc6 11. fxe6 {note 36} fxe6 12. Nxc6 bxc6 13. e5!

The mainline captures the white pawn with the pawn instead of with the bishop. 13. e5 is assessed as 'a good move'.

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The mainline with 13. dxe5 is followed until 17. ... Qa4. Then, 18. c4 continues without any note or alternative move given, evaluating the finish of the mainline as 'the game is even'. So, it looks like the comment from December 28th, 2019 at ChessGames is right and the novelty is 18. Nxf6+. The video of the original post says '[...] white finds a tremendous concept [...]' about 18. Nxf6+.

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I was not aware of these games and the opening preparation of both looks very, very nice.

Regards from Spain.

Ajedrecista.