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Normal Topic Bd3 vs e6 sicilians? (Read 1826 times)
BertieRussel
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Re: Bd3 vs e6 sicilians?
Reply #3 - 02/07/07 at 11:05:42
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Incidentally, Emms gives the following main line for black:

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e6 7. O-O Nbd7 8. a4 b6 9. f4 Bb7 10. Qf3 g6 11. Nb3 Bg7

which reminds me a lot of the kan!
  
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Ptero
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Re: Bd3 vs e6 sicilians?
Reply #2 - 02/07/07 at 10:38:56
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Willempie wrote on 02/07/07 at 09:20:11:
-I dont have a clue why, but after 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 Nf6 8.0-0 the move 8..d6 is never played  


Well after 8...d6 white gets an improved version of the Be2 Scheveningen (which in any case -  afaik - is considered promising for white nowadays). Delchev/Semkov consider the ...d6 setup dubious for black if white has played Bd3 (given that white has not wasted time with Nd4-b3), and indeed white has a big plus score in this position.
  
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Willempie
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Re: Bd3 vs e6 sicilians?
Reply #1 - 02/07/07 at 09:20:11
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Interesting question. Maybe it has something to do with a combination of factors:
-The queen on c7, which is switched for d6. So you are more vulnerable on d6 and for e4-e5. If black plays d6 he is more vulnerable to f4 and e4-e5 or f4-f5 due to the lost tempo.
-I dont have a clue why, but after 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 Nf6 8.0-0 the move 8..d6 is never played (well not by someone I know at least). I think that the answer to your question is found in this variation as it is a standard schevy/Najdorf setup with Bd3 iso Be2 and Qc7 iso Be7. Maybe white has just a bit more pressure in this line than in the analogous Schevy line as you prolly will go f4-Qf3-Qg3 and now e5 or f5, but I honestly dont know.
  

If nothing else works, a total pig-headed unwillingness to look facts in the face will see us through.
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BertieRussel
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Bd3 vs e6 sicilians?
02/07/07 at 04:53:11
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In the intro to "Winning with the Kan" Ali Mortazavi says that some people argue the kan is inferior to the schevy because white can play Bd3 rather than the traditional Be2. I would like to know why an early Bd3 one of the main tries for white vs the taimanov and kan, but not vs the scheveningen?

In "Play the Najdorf" Emms says he likes Nbd7 setups vs an early Bd3 (such as 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Bd3 Nbd7). But black can easily play Nd7 instead of Nc6 in the kan, so it can't be as simple as that.

I am thinking, for instance, of the following positions:

Schevy:

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 a6 7. Bd3 or

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bd3 Nc6 7. Be3 These are both minor sidelines according to my database.

Taimanov:

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Bd3 Most popular here.

Kan:

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 is again the most popular move.

What's going on here? The main difference I see is the early Qc7 in the latter positions. Is white arguing that this is a wasted tempo, and this gives him time for Bd3? I don't understand. Thanks a lot for your help.
  
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