Test position in the gothenburg variation

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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Test position in the gothenburg variation

Post by Nordlandia »

From New In Chess yearbook 125 page 58. The Gothenburg variation resurrected?!

[d]8/6k1/1p1rb3/1Q3n2/8/8/PPP4P/2K5 b - - 0 36
Positional evaluation +1 for white

14. e5 is the latest inovation in this line.

[pgn][Event "Chapter - 10"]
[Site "https://lichess.org/RLiscdUi"]
[Date "????.??.??"]
[Round "?"]
[White "Chapter 10"]
[Black "Game 1"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "B98"]
[Opening "Sicilian Defense: Najdorf Variation, Goteborg (Argentine)"]
[Termination "Unterminated"]
[Annotator "lichess.org"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 g5 { B98 Sicilian Defense: Najdorf Variation, Goteborg (Argentine) } 10. fxg5 Nfd7 11. Nxe6 fxe6 12. Qh5+ Kf8 13. Bb5 Rh7 14. e5 axb5 15. exd6 Bxg5 16. Bxg5 Qxg5 17. O-O+ Nf6 18. Rxf6+ Qxf6 19. Rf1 Qxf1+ 20. Kxf1 Rf7+ 21. Ke2 Kg7 22. g4 Nd7 23. g5 hxg5 24. Qxg5+ Kh7 25. Qh5+ Kg7 26. Qg4+ Kf8 27. Ne4 Nf6 28. Qh4 Ng8 29. Qd8+ Kg7 30. Nc5 b6 31. Nxe6+ Bxe6 32. Qxa8 Nh6 33. Qc6 Nf5 34. Kd2 Rd7 35. Kc1 Rxd6 36. Qxb5 *[/pgn]
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Ajedrecista
Posts: 1968
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Test position in the Gothenburg variation.

Post by Ajedrecista »

Hello:
Nordlandia wrote: ↑Thu Sep 24, 2020 6:54 pm From New In Chess yearbook 125 page 58. The Gothenburg variation resurrected?!

[d]8/6k1/1p1rb3/1Q3n2/8/8/PPP4P/2K5 b - - 0 36
Positional evaluation +1 for white

14. e5 is the latest inovation in this line.

[pgn][Event "Chapter - 10"]
[Site "https://lichess.org/RLiscdUi"]
[Date "????.??.??"]
[Round "?"]
[White "Chapter 10"]
[Black "Game 1"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[Variant "Standard"]
[TimeControl "-"]
[ECO "B98"]
[Opening "Sicilian Defense: Najdorf Variation, Goteborg (Argentine)"]
[Termination "Unterminated"]
[Annotator "lichess.org"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 g5 { B98 Sicilian Defense: Najdorf Variation, Goteborg (Argentine) } 10. fxg5 Nfd7 11. Nxe6 fxe6 12. Qh5+ Kf8 13. Bb5 Rh7 14. e5 axb5 15. exd6 Bxg5 16. Bxg5 Qxg5 17. O-O+ Nf6 18. Rxf6+ Qxf6 19. Rf1 Qxf1+ 20. Kxf1 Rf7+ 21. Ke2 Kg7 22. g4 Nd7 23. g5 hxg5 24. Qxg5+ Kh7 25. Qh5+ Kg7 26. Qg4+ Kf8 27. Ne4 Nf6 28. Qh4 Ng8 29. Qd8+ Kg7 30. Nc5 b6 31. Nxe6+ Bxe6 32. Qxa8 Nh6 33. Qc6 Nf5 34. Kd2 Rd7 35. Kc1 Rxd6 36. Qxb5 *[/pgn]
There are some comments about 14.- e5 at ChessGames starting from the following comment from year 2016 on the game Gligoric - Fischer, 1958:

https://www.chessgames.com/perl/chessga ... =2#reply32

Though they do not deal with 14.- ..., Bxb5. The Encyclopedia of Chess Openings, Volume B, edition of 1975 follows games until 13.- ..., Rh7! (marked as a very good move in ECO), but then gives 14.- O-O and 14.- Qg6.

Regards from Spain.

Ajedrecista.
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Nordlandia
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Location: Sortland, Norway

Re: Test position in the gothenburg variation

Post by Nordlandia »

Stockfish NNUE is about to defeat Lc0 in that endgame. It may turn out it can be winning.

Material suggest white is 1 pawn ahead. But it is way out of human comprehension to convert something like that.
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mmt
Posts: 343
Joined: Sun Aug 25, 2019 8:33 am
Full name: .

Re: Test position in the gothenburg variation

Post by mmt »

Nordlandia wrote: ↑Thu Sep 24, 2020 6:54 pm 14. e5 is the latest inovation in this line.
SF NNUE is pretty sure 14. e5 draws. 0.00 starting at depth 26. Same line as at https://www.chessgames.com/perl/chessga ... =2#reply32

61/41 17:09 37,110,641k 36,043k 0.00 1. ... Nxe5 2.0-0+ Kg8 3.g6 Bxh4 4.gxh7+ Kxh7 5.Bd3+ Kg7 6.Ne4 Nbc6 7.Nxd6 Qxd6 8.Qxh4 Qd4+ 9.Qxd4 Nxd4 10.Be4 Bd7 11.Rae1 Ndc6 12.Bxc6 Nxc6 13.Re3 Rg8 14.Rb3 b5 15.Rc3 Be8 16.Rd3 Bf7 17.Rd7 Ne5 18.Ra7 Rc8 19.c3 Rc6 20.Re1 Nd3 21.Rf1
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jdart
Posts: 4366
Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Test position in the gothenburg variation

Post by jdart »

14. .. Nxe5 seems like the way to go. See also:

[pgn][Event "VWC10 /pr 56"]
[Site "ICCF"]
[Date "2017.09.01"]
[Round "?"]
[White "Jaumandreu Llopis, Antonio"]
[Black "Spasov, Spas"]
[Result "1/2-1/2"]
[ECO "B98"]
[WhiteElo "2262"]
[BlackElo "2269"]
[PlyCount "76"]
[EventDate "2017.??.??"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
h6 9. Bh4 g5 10. fxg5 Nfd7 11. Nxe6 fxe6 12. Qh5+ Kf8 13. Bb5 Rh7 14. e5 Nxe5
15. O-O+ Kg8 16. g6 Bxh4 17. gxh7+ Kxh7 18. Bd3+ Kg7 19. Ne4 Nbc6 20. Nxd6 Qxd6
21. Qxh4 Qd4+ 22. Qxd4 Nxd4 23. Be4 Nf5 24. Rae1 Nf7 25. Rf3 N5d6 26. Rc3 Rb8
27. Bf3 Kf6 28. Rc7 Ne8 29. Rc3 Bd7 30. Bh5 Nfd6 31. Rd1 Bc6 32. Bxe8 Nxe8 33.
Rf1+ Ke7 34. Rh3 Rd8 35. Rxh6 Rd2 36. Rf2 Rd1+ 37. Rf1 Rd2 38. Rf2 Rd1+ 1/2-1/2[/pgn[[/pgn]
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mmt
Posts: 343
Joined: Sun Aug 25, 2019 8:33 am
Full name: .

Re: Test position in the gothenburg variation

Post by mmt »

For 14. 0-0+ SF NNUE also confirms a draw:
0.00 since depth 55 all the way to 67

67/105 1:16:10 86,036,183k 18,822k 0.00 1.0-0+ Kg8 2.g6 Rg7 3.Rf7 Bxh4 4.Qxh6 Rxf7 5.gxf7+ Kxf7 6.Qh7+ Ke8 7.Qg8+ Ke7 8.Qg7+ Ke8 9.Rf1 Qb6+ 10.Kh1 Kd8 11.Bc4 Nc6 12.Bxe6 Qd4 13.Qg8+ Kc7 14.Nd5+ Kb8 15.Bxd7 Bd8 16.Bxc6 bxc6 17.Qxd8 cxd5 18.Qxd6+ Ka7 19.c3 Qe3 20.exd5 Rb8 21.Qf4 Qd3 22.Kg1 Ka8 23.Qd4 Qc2 24.b4 Qxa2 25.Rd1 Bb7 26.h3 Rf8 27.Kh2 Rf2 28.Qg4 Re2 29.Rd4 Re1 30.Qf5 Re2 31.Qf3 Re8 32.h4 Rd8 33.Qg3 Rxd5 34.Qg7 Kb8 35.Qg8+ Ka7 36.Kh3 Qb3 37.Rxd5 Bxd5 38.Qg7+ Bb7 39.Qd4+ Ka8 40.h5 Qe6+ 41.g4 Qe1 42.Qh8+ Ka7 43.Qg7 Ka8 44.Qf8+ Ka7 45.c4 Qh1+ 46.Kg3 Qg1+ 47.Kh4 Qe1+ 48.Kg5 Qe5+ 49.Qf5 Qg7+ 50.Kf4 Qd4+ 51.Kg5
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