The Petroff Defense 4. Nd3

[AdminX]

[d]rnbqkb1r/ppp2ppp/3p1n2/8/4P3/3N4/PPPP1PPP/RNBQKB1R b KQkq - 1 4

Anyone here familiar with this variation?

[Dann Corbit]

I have this opening listed as "Russian Game: Karklins-Martinovsky Variation."

[d]rnbqkb1r/ppp2ppp/3p1n2/8/4P3/3N4/PPPP1PPP/RNBQKB1R b KQkq - acd 40; acs 575; bm Nxe4; ce -25; pm Nxe4 {200}; pv Nxe4 Qe2 Qe7 Nf4 Nf6 d4 Qxe2+ Bxe2 Nc6 c3 g6 Na3 Bf5 Nc4 Bd7 O-O O-O-O Re1 Ne7 h4 Bg7 Bd2 Nf5 g3 Rhe8 Bf3 c6 a4 Rxe1+ Rxe1 Kc7 a5 h5 d5 Re8 Rxe8 Bxe8 dxc6 Bxc6 Bxc6 bxc6 Ne3 Nxe3 Bxe3; white_wins 46; black_wins 88; draws 66; Opening Russian Game: Karklins-Martinovsky Variation. 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nd3; CaxtonID: 1873; ECO: C42;

Even though the -25 centipawn computer score is not very compelling, in actual game outcomes, it seems to have fared very well for black.
The humans and the computer also agree on Nxe4, with 100% compliance all around.

[AdminX]

I have this opening listed as "Russian Game: Karklins-Martinovsky Variation."

[d]rnbqkb1r/ppp2ppp/3p1n2/8/4P3/3N4/PPPP1PPP/RNBQKB1R b KQkq - acd 40; acs 575; bm Nxe4; ce -25; pm Nxe4 {200}; pv Nxe4 Qe2 Qe7 Nf4 Nf6 d4 Qxe2+ Bxe2 Nc6 c3 g6 Na3 Bf5 Nc4 Bd7 O-O O-O-O Re1 Ne7 h4 Bg7 Bd2 Nf5 g3 Rhe8 Bf3 c6 a4 Rxe1+ Rxe1 Kc7 a5 h5 d5 Re8 Rxe8 Bxe8 dxc6 Bxc6 Bxc6 bxc6 Ne3 Nxe3 Bxe3; white_wins 46; black_wins 88; draws 66; Opening Russian Game: Karklins-Martinovsky Variation. 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nd3; CaxtonID: 1873; ECO: C42;

Even though the -25 centipawn computer score is not very compelling, in actual game outcomes, it seems to have fared very well for black.
The humans and the computer also agree on Nxe4, with 100% compliance all around.

I am watching the current World Chess Championship 2018 and this Variation was played. I think I will just call in the Nightmare Variation.

[Dann Corbit]

Can you post the PGN when the game is over?

I love wild games.

Especially since this opening has a propensity for opposite castles, which I adore.

[AdminX]

Can you post the PGN when the game is over?

I love wild games.

Especially since this opening has a propensity for opposite castles, which I adore.

Sure thing Dan.

[AdminX]

[pgn]
[Event "World Chess Championship 2018"]
[Site "London"]
[Date "2018.11.16"]
[Round "6"]
[White "Carlsen, Magnus"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2835"]
[BlackElo "2832"]
[Annotator "ChessBase"]
[PlyCount "160"]
[EventDate "2018.10.20"]
[EventType "match"]
[EventCountry "ENG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "40/6000+30:20/3000+30:900+30"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3 {C42: Petroff Defence: 3 Nxe5 and
unusual White 3rd moves} (4. Nf3 Nxe4 5. d4 (5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 Nc6
8. Bc4 O-O 9. Qd2 Bf5 10. O-O-O Qd7 11. Kb1 Rfe8 12. h4 Bf8 13. h5 h6 14. Be2
Bg4 15. Nh2 Bxe2 16. Qxe2 {1/2-1/2 (41) Carlsen,M (2842)-Caruana,F (2822)
Saint Louis 2018}) 5... d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Nc3 Nxc3 10. bxc3
dxc4 11. Bxc4 Bf5 12. Ng5 h6 13. Qf3 Bg6 14. Ne4 Bxh2+ 15. Kxh2 Qh4+ 16. Qh3
Qxh3+ 17. gxh3 Bxe4 18. Rg1 Re8 19. Bxh6 g6 {1/2-1/2 (52) Vachier Lagrave,M
(2780)-Wang,H (2722) Douglas 2018}) 4... Nxe4 5. Qe2 {LiveBook: 14 Games} Qe7
6. Nf4 Nc6 7. Nd5 Nd4 {Double Attack} 8. Nxe7 Nxe2 9. Nd5 Nd4 10. Na3 $146 ({
Predecessor:} 10. Bd3 Nxf2 11. Kxf2 Kd8 12. Re1 c5 13. c3 c4 14. cxd4 cxd3 {
0-1 (47) Baudifier,Y (1600)-Sochacki,C (1009) France 2002}) 10... Ne6 11. f3
N4c5 12. d4 Nd7 13. c3 c6 14. Nf4 Nb6 15. Bd3 d5 16. Nc2 Bd6 17. Nxe6 Bxe6 18.
Kf2 h5 19. h4 Nc8 20. Ne3 Ne7 21. g3 c5 22. Bc2 O-O 23. Rd1 Rfd8 24. Ng2 cxd4
25. cxd4 Rac8 26. Bb3 Nc6 27. Bf4 Na5 28. Rdc1 Bb4 29. Bd1 Nc4 30. b3 Na3 31.
Rxc8 Rxc8 32. Rc1 Nb5 33. Rxc8+ Bxc8 34. Ne3 Nc3 35. Bc2 Ba3 36. Bb8 a6 37. f4
Bd7 38. f5 Bc6 39. Bd1 Bb2 40. Bxh5 Ne4+ {Discovered Attack (Double check)} 41.
Kg2 Bxd4 42. Bf4 Bc5 43. Bf3 Nd2 44. Bxd5 Bxe3 $1 45. Bxc6 Bxf4 46. Bxb7 Bd6
47. Bxa6 Ne4 48. g4 Ba3 49. Bc4 Kf8 50. g5 {[#]} Nc3 $1 51. b4 Bxb4 52. Kf3 Na4
53. Bb5 Nc5 54. a4 f6 55. Kg4 Ne4 56. Kh5 {[#]} Be1 $1 57. Bd3 Nd6 58. a5 Bxa5
59. gxf6 gxf6 60. Kg6 Bd8 61. Kh7 Nf7 62. Bc4 Ne5 63. Bd5 Ba5 64. h5 Bd2 65.
Ba2 Nf3 66. Bd5 Nd4 67. Kg6 {[#]} (67. Be4 $17 {was called for.}) 67... Bg5 $1
68. Bc4 {[#]} Nf3 (68... Bh4 $1 $19 {has better winning chances.} 69. Bd5 Ne2)
69. Kh7 Ne5 70. Bb3 Ng4 71. Bc4 $1 Ne3 72. Bd3 Ng4 $2 (72... Ng2 $17 73. Be4
Nf4) 73. Bc4 Nh6 74. Kg6 Ke7 75. Bb3 Kd6 76. Bc2 Ke5 77. Bd3 Kf4 78. Bc2 Ng4
79. Bb3 $17 Ne3 80. h6 Bxh6 1/2-1/2

[/pgn]

[AdminX]

[Dann Corbit]

Full of threats and danger, and a piece up at the end (to a pawn) for Caruna. Carlsen was the one living dangerously in this game. King shelter shattered early and down a piece in the endgame, but escaped with a draw.

[jdart]

I haven't done a deep look but I think Carlsen was ok out of the opening. He got in big trouble later.

--Jon

[Dann Corbit]

I haven't done a deep look but I think Carlsen was ok out of the opening. He got in big trouble later.

--Jon

Yes, when the moves were in the 40's