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Normal Topic 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2!? (Read 4075 times)
MicahSmith
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Re: 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2!?
Reply #4 - 06/05/19 at 04:56:46
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Alphazero played a game against Stockfish in this line (search for "AlphaZero's London System pawn sacrifice novelty" on YouTube).

Thoughts?
  
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Anonymous3
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Re: 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2!?
Reply #3 - 11/24/17 at 23:31:33
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Anonymous3 wrote on 07/24/11 at 04:22:18:
After 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6, what do you think about the move 5.Nbd2(!?)?

a) It looks at first that this is just bad due to 5...Qb6 and after 6.dxc5! Qxb2 6.Rb1 (not in any source I'm aware of), Fritz 11 and Rybka 3 think Black is at least = but eventually change their assessment to +=.

b) It also looks at first that 5...cxd4 6.exd4 Qb6 (other moves transpose to better known lines after 7.c3 that I think give White an advantage) is at least ok for Black and after 7.Nb3, Fritz 11 and Rybka 3 think Black is = but again eventually change their assessment to +=.

c) 5...Nh5!? 6.dxc5 (6.Bg5 h6 7.Bh4 g5 8.Ne5 Nf6 9.Bg3-Unclear) 6...Nxf4 7.exf4 Qa5 (7...e6 8.Nb3 Qf6 9.Qc1! a5 10.a4 +=) 8.c4 Qxc5 9.cxd5 Qxd5 10.Bc4 Qf5 11.g3 g6! 12.Qb3 Bg7 13.Nh4 Qf6 14.Ne4 Qxb2 15.Bxf7+ Kf8 16.Rb1 Qxb4 17.Rxb3 Nd4 18. 0-0 Nxb3 19.axb3 =.

d) 5...Bf5, 5...Bg4, and 5...e6 all transpose to better known lines after 6.c3 that I think give White good chances for an advantage.

e) 5...g6 6 dxc5! +=


Sedlaks new book on the London recommends 5.Nbd2!, https://www.newinchess.com/winning-with-the-modern-london-system-5320. After 5...Bf5 I recommended 6.c3 but Sedlak improves upon this by recommending 6.dxc5! It's not clear from the pdf sample if Sedlak covers 5...Nh5!? but after 6.dxc5! Nxf4 7.exf4 Qa5 8.c4 Qxc5, it seems White can improve upon my earlier analysis with 9.b4!
  
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Re: 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2!?
Reply #2 - 07/24/11 at 17:25:33
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Anonymous3 wrote on 07/24/11 at 04:22:18:
b) It also looks at first that 5...cxd4 6.exd4 Qb6 (other moves transpose to better known lines after 7.c3 that I think give White an advantage)

I don't think so, but I have less faith in computer evaluations than you do.
Compare 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Nf3 Bf5 5.Bf4 Nf6 6.c3 Nc6 7.Nbd2. This is not exactly the critical way to combat the Caro-Kann.
  

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Re: 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2!?
Reply #1 - 07/24/11 at 12:12:50
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My first impression is that this can't be too ambitious for White. It doesn't put pressure on d5 and it blocks the d-file. Black should be able to get a good position after this, but I will take a look at it on a board first.
  
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Anonymous3
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1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2!?
07/24/11 at 04:22:18
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After 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6, what do you think about the move 5.Nbd2(!?)?

a) It looks at first that this is just bad due to 5...Qb6 and after 6.dxc5! Qxb2 6.Rb1 (not in any source I'm aware of), Fritz 11 and Rybka 3 think Black is at least = but eventually change their assessment to +=.

b) It also looks at first that 5...cxd4 6.exd4 Qb6 (other moves transpose to better known lines after 7.c3 that I think give White an advantage) is at least ok for Black and after 7.Nb3, Fritz 11 and Rybka 3 think Black is = but again eventually change their assessment to +=.

c) 5...Nh5!? 6.dxc5 (6.Bg5 h6 7.Bh4 g5 8.Ne5 Nf6 9.Bg3-Unclear) 6...Nxf4 7.exf4 Qa5 (7...e6 8.Nb3 Qf6 9.Qc1! a5 10.a4 +=) 8.c4 Qxc5 9.cxd5 Qxd5 10.Bc4 Qf5 11.g3 g6! 12.Qb3 Bg7 13.Nh4 Qf6 14.Ne4 Qxb2 15.Bxf7+ Kf8 16.Rb1 Qxb4 17.Rxb3 Nd4 18. 0-0 Nxb3 19.axb3 =.

d) 5...Bf5, 5...Bg4, and 5...e6 all transpose to better known lines after 6.c3 that I think give White good chances for an advantage.

e) 5...g6 6 dxc5! +=

« Last Edit: 07/24/11 at 07:44:49 by Anonymous3 »  
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