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Normal Topic C12: Be3 vs. Bc1 Mac (Read 2244 times)
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Re: Be3 vs. Bc1 Mac
Reply #3 - 04/18/05 at 03:40:01
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Hell..............o;

1. The difference between 6.Bc1 and 6.Be3? Lack of pressure on the d4 and c5 squares allows black two different defensive ideas.  After 6.Bc1 Ne4 7.Qg4 Kf8!?.a3 Bxc3 + and 8.a3 Ba5(should transpose to 8.Ne2 c5 9.a3 Ba5) GM Hector has two games illustrating both ideas. Although you could play 8.....Ba5 in (6.Be3) variation, stat is very negative for Black.

2. One idea is 8.a3 Bxc3+ 9.bxc3 c5 10.Bd3 Nxc3 11.dxc5 Nc6 12.Nf3 f5 13.exf5 Qxf6 14.Bb2,(The bishop threatens for a short time.), the position looks equal after 14.....e5 15.Qh4.

3. I don't believe the variations overlap between the two. But, strategy and tactics are similar.

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Re: Be3 vs. Bc1 Mac
Reply #2 - 04/17/05 at 13:47:01
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Differences Be3 (Janovsky) vs Bc1 (Olland):
6.Bc1 Ne4 7.Qg4 g6 8.Ne2 c5 9.a3 and now Black has not the move 9..Qa5 (a good move in 6.Be3 variation) thus 9...Bxc3+ 10.Nxc3 Nxc3 11.bxc3 Qa5 12.Bd2 and small advantage to White.
Maybe Be3 is best because basic plan for White is to give c3 pawn and take c5 pawn (dxc5) and queen can move from g4 to b4: 6.Be3 Ne4 7.Qg4 Kf8 8.a3 Bxc3+ (8..Ba5 9.Ne2!) 9.bxc3 Nxc3 10.Bd3 c5 11.dxc5 Qa5? 12.Bd2 Qa4 13.Qb4 and if Black doesn't play c5 then White has a good attack.---
Psakhis is the first to give following idea: 6.Be3 Ne4 7.Qg4 g5!?  8.a3 h5! and I have following games references: Veselovsky-Glek,Moscou 1984 (MCO) ; Govedarica-Ruckshloss,Trnava 1990 (Psakhis) ; Belov-Alavkin,Sochi 2004
  

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Re: Be3 vs. Bc1 Mac
Reply #1 - 04/15/05 at 15:54:26
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The two variations 6.Be3 and 6.Bc1  transpose, if Black plays Nxe4 and White plays the bishop to c3 again. An example is 6.Be3 Ne4 7.Qg4 g6 8.a3 Bxc3+ 9.bxc3 Nxc3 10.Bd3 Qe7 11.Nf3 Nc6 12.Bd2.
But when Black plays 10...c5 11.dxc5 Nc6 I think the bishop is better on e3 than on c1.
Finally White has the similar 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6 and now 9.Bc1 or 9.Be3. But that is probably weaker for two reasons: in some lines Black has Qb4 available and in some other White has exactly not Qb4 available!
  
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C12: Be3 vs. Bc1 Mac
04/15/05 at 10:20:03
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In a couple of my correspondence games, I have been confronted with 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Bc1.  On the surface, this move looks fairly interesting but not altogether dangerous, though I'm finding it is giving me some trouble.  The games are still in progress, so I don't want to go into too much detail here, but I was curious about a couple of things:

1. It's quite clear that 6 Bd2 leads to some fiercely independent lines, but is there much difference between 6 Bc1 and Be3?  6 Be3 strikes me as rather dangerous, but then the bishop is rather passive for the next 15 to 20 moves.  Is 6 Bc1 any different?

2. To what extent can variations overlaps between Bc1 and Be3?
« Last Edit: 08/03/11 at 19:36:50 by dom »  

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