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Normal Topic Idea in the 3...Bc5 4 0-0 Nd4 Variation (Read 1746 times)
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Idea in the 3...Bc5 4 0-0 Nd4 Variation
06/25/17 at 09:17:37
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I've stumbled across an interesting idea for White in which I've barely been able to find any games:

1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 0-0 Nd4 5 Nxd4 Bxd4 6 c3 Bb6 7 d4 c6 [b]8 Bd3!?[/b]

A pawn sacrifice.

A) [b]8...d6 9 Be3![/b] The difference between d3 and other squares becomes clear. After (e.g.) 8 Ba4 d6, if you try to set up with 9 Be3 (intending Nd2), Black has 9...Nf6, hitting the undefended e4 pawn, as well as planning ...Ng4.

Now, a sample line (after 8 Bd3 d6 9 Be3) runs [b]9...Nf6 10 h3 0-0 11 Nd2 Re8 12 Qe2 Qe7 13 Rfe1[/b] (13 f4 Nd5!=) [b]13...Bc7 14 Bc2[/b] (14 f4!?) [b]14...Be6[/b], and now White can play slowly with 15 a4, or more ambitiously with 15 f4!?, and I think he has a slight edge.

B) [b]8...exd4[/b] is obviously critical:

[b]9 cxd4 Bxd4 10 Bc4[/b] is the idea. Now:

B1) [b]10...Qf6?! 11 Nd2! Ne7[/b] (11...Bxb2 12 Bxf7+! Qxf7 13 Bxb2 with more than enough compensation.) [b]12 Nf3 Bxb2 13 e5! Bxe5 14 Nxe5 d5[/b] (14...Qxe5 15 Re1 Qf6 16 Ba3 etc.) [b]15 Bb2 dxc4 16 Nxc4 Qf4 17 Nd6+ Kf8 18 g3[/b] and White is winning.

B2) [b]10...Bb6 11 Qb3! Qe7 12 Qg3! Nf6[/b] (12...Bd4 13 Rd1 Be5 14 f4 Qc5+ 15 Be3 Qxc4 16 Nd2 Qd3 17 fxe5 is better for White.) [b]13 e5 Nh5 14 Qf3 g6 15 Bh6 Bc7 16 Nc3 Bxe5 17 Rfe1[/b] with beautiful compensation for White, and what looks like a very difficult practical task ahead for Black.

[pgn][Event "?"]
[Site "?"]
[Date "2017.06.25"]
[Round "?"]
[White "3...Bc5 4 0-0 Nd4"]
[Black "8 Bd3!?"]
[Result "*"]
[PlyCount "33"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. Nxd4 Bxd4 6. c3 Bb6 7. d4 c6 8.
Bd3 exd4 (8... d6 9. Be3 Nf6 10. h3 O-O 11. Nd2 Re8 12. Qe2 Qe7 13. Rfe1 (13.
f4 Nd5) 13... Bc7 14. Bc2 (14. f4) 14... Be6 15. f4 exf4 16. Bxf4 Bf5 17. Qf2)
9. cxd4 Bxd4 10. Bc4 Bb6 (10... Qf6 11. Nd2 Bxb2 (11... Ne7 12. Nf3 Bxb2 13. e5
Bxe5 14. Nxe5 d5 (14... Qxe5 15. Re1 Qf6) 15. Bb2 dxc4 16. Nxc4 Qf4 17. Nd6+
Kf8) 12. Bxf7+ Qxf7 13. Bxb2) 11. Qb3 Qe7 12. Qg3 Bd4 (12... Nf6 13. e5 Nh5 14.
Qf3 g6 15. Bh6 Bc7 16. Nc3 Bxe5 17. Rfe1) 13. Rd1 Be5 (13... Bf6 14. Nc3) 14.
f4 Qc5+ 15. Be3 Qxc4 16. Nd2 Qd3 17. fxe5 *
[/pgn]
  
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