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Nov-05-05
 | | ray keene: 28 bxa5??
overprotection according to nimzowitsch-here in my opinion the overprtoecting units grouped around e5 should spring into life with 28bg5!! in my opinion this sacrifice shd win tho i wd welcome a computer analysis if anyone can provide it |
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| Nov-05-05 | | KingG: <ray keene> I've done some analysis of this game, and the sac you suggest is sound. Unfortunately, it seems Black might be able to hold on by a miracle. The analysis is quite lengthy, so i'll just give the main line. 28.Bg5 hxg5(probably Black should decline the sac with 28...Qc7 and then i'm not sure White has anything better than 29. Bf4 Qe7 30.Bg5 etc) 29.hxg5 Qc7!(the ability of the Queen to take on c3 is important later) 30.Bf3 Ne7 31.Kg2 Nf5 32.Nf6+ Bxf6 33.gxf6 Rh8 34.Rh1+ Kg8 35.Rxh8+ Kxh8 36.Rh1+ Kg8 37.Qf4 Bf1+!!(unbelievably this move keeps Black in the game. The point is that White would like to play g4 to kick the knight from the excellent f5 square and get his queen to h6, but the combination of the Black Queen on c3 and the knight going to h4 create a lot of problems, not to mention the rook ready to come down the c-file) 38.Rxf1 Qxc3 39.bxa5 Rc4! 40.Qg5 Qd3 and it's not clear to me how to make progress. White has an extra pawn but it's doubled and White's king isn't that safe. |
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| Nov-05-05 | | KingG: Ok, the best moves after 40...Qd3 seem to be:
41.Rd1 Qc2 42.Rh1 Rc3 43.Re1 Rxf3! 44.Kxf3 Qc3+ 45.Re3 Qc1! 46.Qf4 Nxe3 47.Qxe3 Qh1+ 48.Ke2 Qa1  White still has his extra pawn, but i would think this endgame is probably drawish. Of course all this is only a quick analysis, so it's possible i missed a clean win somewhere, but if i haven't then it really is remarkable that Black could survive. From a practical point of view though, he has to find too many good moves, so probably he should decline the sac. |
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Nov-06-05
| | ray keene: thanks for the analysis |
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| Sep-21-06 | | Resignation Trap: April 15-16, 1951
The importance of each game increased as the match progressed, and Botvinnik was aware of this in his pre-game journal entry: "Each game may be the deciding one. Play for simplification and technique, but don't avoid complications. Time and the assessment! Calculate variations to the end. Work without relaxing. All the same by move 25-35 you won't easily achieve anything. Harassing moves + enduring initiative. Need to play well! Let's go!" |
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| Sep-21-06 | | Resignation Trap: Botvinnik's self-criticism during this match seemed unrelenting. Here's what he had to say after this game in his journal: "Like an imbecile! Missed an opportunity in the opening - ended up in a desperate position. Saved by Bronstein becoming rattled. On the resumption I myself became rattled - how many times is that?" |
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| May-04-08 | | KingG: <ray keene> It appears you were in fact correct with your assessment of 22.Bg5!!. In the line given above, I actually made quite a bad mistake. White should of course interpose 33.Rh1+ before recapturing the knight. So the main line runs 28.Bg5 hxg5 29.hxg5 Qc7 30.Bf3 Ne7 31.Kg2 Nf5 32.Nf6+ Bxf6 33.Rh1+ Kg8 34.exf6, and now the threat of simply doubling rooks on the h-file is crushing.
click for larger view |
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May-10-08
| | ray keene: i am very pleased to see that my instinct appears to have been vindicated |
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May-11-08
 | | Pawn and Two: <ray keene & KingG> In "World Chess Championship 1951", by W. Winter & R. G. Wade, Wade stated that 28.bxa5 was criticised by many of the masters present in Moscow, who had suggested instead, 28.Be3 axb4 29.cxb4 Qd7 30.Bc5. Fritz indicates some advantage for White in this line after: 28.Be3 axb4 29.cxb4: (.51) (19 ply) 29...h5 30.Bg5 Qd7 31.Nf6+ Bxf6 32.exf6 Qxa4. Wade stated, an alternative line would be for White to try eliminate Black's Queen Bishop by 28.Ne3. In the Olms edition, "Match for the World Chess Championship Mikhail Botvinnik - David Bronstein, Moscow 1951", Evgeny Sveshnikov stated that White should play 28.b5 with the better chances. He stated that Black's Bishop was poorly placed on c4, and that White's plan is simple, he can play his Bishop to d4, then Ne3 and Bh3, followed by a gradual advance of his kingside Pawns. Fritz found some advantage for White after 28.b5, but preferred the following line: (.81) (23 ply) 28.Ne3 axb4 29.cxb4 f6 30.Nc2, (.83) (22 ply) 30...fxe5 31.Bxe5 Nf6 32.Nd4. Fritz found the interesting Bishop sacrifice 28.Bg5, to be playable, but indicated it would only lead to an equal game. After 28.Bg5 hxg5 29.hxg5, Fritz indicated: (-.09) (24 ply) 29...axb4 30.cxb4 Rc6 31.Bf3 Bd3 32.Qxd3 Qxg5, with an equal game. There certainly were a lot of choices for White at move 28. We have reviewed: 28.bxa5, 28.b5, 28.Be3, 28.Ne3, and 28.Bg5. Fritz indicated several other moves are also playable, including 28.h5, and 28.Bf3. Do you see an improved plan for White after: 28.Bg5 hxg5 29.hxg5 axb4? |
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| May-11-08 | | CharlesSullivan: <Pawn and Two & ray keene & KingG> Rybka and Zappa agree with Fritz that 28.Bg5 does not lead to a win: 28...hxg5 29.hxg5 axb4 30.cxb4 <30.♗f3 is premature: 30...bxc3 31.♕f4 ♗d3 32.♔g2 f5 33.♖h1+ ♗h6 34.♘xh6 ♔g7 35.♖bc1 ♕c7 and Black is all right> 30...Rc6 31.Bf3 Bd3 32.Qxd3 Qxg5 33.Be2 Nh6 34.Nxh6 Bxh6 is roughly equal. <Also survivable after 28.Bg5 hxg5 29.hxg5 is 29...Rfd8 30.Bf3 axb4 31.cxb4 Bd3 32.Qxd3 Qxg5 33.Be2 Nh6 34.f4 Qe7 35.Nxh6 Bxh6 36.Kg2 Bf8 37.Rh1+ Kg8 38.g4 Bg7 39.Qd2 f6 40.exf6 Bxf6.> |
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May-12-08
| | ray keene: in the above variation i wonder whether 31 qf4 instead of bf3 might be a possibility. of course the resource ---bd3 is very clever, the sort of thing a computer will spot. another thought is that white cd repeatedly have tried the bg5 sac from move 21 onwards. could it have been implemented more sucessfully at an earlier stage? i think this kind of idea was just not known at that time since none of the commentators pointed it out as a possibility-anyway i wd be interested in seeing the outcome after qf4 in place of bf3.i also cant help feeling that the practical effect wd have been quite devastating if bronstein had actually played bg5 at some stage. |
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May-12-08
| | ray keene: another thought in the defensive variation given-cd white consider rxb4 as a recapture instead of axb4? |
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May-12-08
| | ray keene: yet another thought-after the defensive resource --bd3 is the immediate nf6+ any good? |
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May-12-08
| | ray keene: belay that last idea-i have just seen the tactics which refute it-i am trying to use my own brain here rather than fritz but i have to confess the silicon brain is much faster than my 6 decade old model and probably saw the refutation in a micro second-whereas it took me rather longer. |
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| May-13-08 | | CharlesSullivan: <ray keene> Thanks for the continued feedback. I am working on some of your ideas. In the line 28.Bg5 hxg5 29.hxg5 axb4 30.cxb4 Rc6, the suggested 31.Qf4 doesn't seem any more convincing than 31.♗f3. Something like 31...Rfc8 32.b5 R6c7 33.Nf6+ Nxf6 34.exf6 Qf8 35.fxg7 Qxg7 gets evaluated as pretty level. I will look more closely at this line soon. Currently, I am looking at 22.Bg5, but proper analysis will require at least 2 or 3 days. Perhaps <Pawn and two> can look at some of the other things. |
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May-13-08
| | ray keene: dont forget the Rxb4 possibility! |
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May-13-08
| | ray keene: also after --qf8 in the most recent line is white obliged to capture at once on g7 or can he try to build up his h file attack first? |
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May-13-08
| | Pawn and Two: <ray keene> Fritz reviewed your new suggestion: 28.Bg5 hxg5 29.hxg5 axb4 30.Rxb4. At 24 ply, Fritz gave the following continuation: 30...Qc7 31.Bf3 Ne7 32.Kg2 Rh8 33.Nf6+ Bxf6 34.gxf6 Nf5 35.Rh1+ Kg8 36.Rxh8+ Kxh8, with an equal position. After 36...Kxh8, Fritz indicated the following continuation: (.00) (20 ply) 37.Qf4 Kg8 38.g4 Nh4+ 39.Kh3 g5 40.Qxg5+ Ng6 41.Rxc4 Qxc4 42.Qh6 Qf1+, with an equal position. |
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| May-13-08 | | RandomVisitor: 28.Ne3 is a solid move that threatens Nxc4. |
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| May-14-08 | | CharlesSullivan: <ray keene & Pawn and Two> Zappa and Rybka confirm that 28.Bg5 hxg5 29.hxg5 axb4 30.Rxb4 leads to equality. If 30...Qc5 (30...Qc7 is just as good), then 31.Bf3 Ne7 32.Kg2 <no better is 32.♘f6+ ♗xf6 33.gxf6 ♖h8! 34.fxe7 ♕xe7 35.♖eb1 ♗a6 36.♖h4+ ♔g7=> Rh8! 33.Nf6+ Bxf6 34.gxf6 Kg8 35.fxe7 Qxe7 holds (36.Rbb1 Kg7 37.Rh1 Ba6 38.Qe3 Qc7=). |
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| May-14-08 | | CharlesSullivan: Per Zappa/Rybka, trying Bg5 at move twenty-two looks like this: 22.Bg5 hxg5 23.hxg5 Bh8! <Black is going to un-castle! -- after a deep search, it's the only move I found that maintains equality> 24.Bf3 Ne7 25.Kg2 Rg8 26.Rh1+ Kg7 27.Qf4 Kf8 28.Nh6 Rg7 and now White has nothing better than to repeat the position with 29.Ng4 Rg8 etc. <In this line, White can keep the initiative with 28.♘f6 ♕c7 29.b4 d4 30.cxd4 cxd4 31.♖hc1 ♗xf6 32.exf6 ♗xf3 33.♕xf3 ♘c6 but he never quite achieves equality, always remaining slightly behind in material; for example: 34.a4 ♕b6 35.b5 axb5 36.axb5 ♘a7 37.♕f4 ♔e8 38.♖c4 ♖xc4 39.dxc4 ♔d7 40.♖d1 ♖d8 41.♖xd4+ ♔c8 and White will be satisfied with a draw.> |
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May-14-08
| | Pawn and Two: <RandomVisitor: 28.Ne3 is a solid move that threatens Nxc4.> See my post of May 11th. The best move Fritz could find at move 28 was also 28.Ne3. I believe you have indicated previously that you use Rybka for your computer analysis. <ray keene & Charles Sullivan & KingG & RandomVisitor> Hans Kmoch in his review of this game in Chess Review did not give any analysis or alternative moves at move 28, but he did apply an exclamation mark for the move Bronstein made, 28.bxa5!. It is very interesting to see all of the diverse opinions and analysis regarding White's choice at move 28. |
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| May-14-08 | | CharlesSullivan: <ray keene> Regarding your query about avoiding 35.fxg7 (in the 31.Qf4 line) and playing for the attack on the h-file, here is the only plausible attack scenario that I could construct that doesn't succumb outright (according to Zappa/Rybka): 28.Bg5 hxg5 29.hxg5 axb4 30.cxb4 Rc6 31.Qf4 Rfc8 32.b5 R6c7 33.Nf6+ Nxf6 34.exf6 Qf8 and now instead of equality after 35.fxg7 ♕xg7, White risks attacking with 35.Bf3 Bd3 <that move again!> 36.Qh4+ <36.♖bd1 ♖c4!> 36...Kg8 37.Rbd1 <37.♔g2 ♗xb1 38.♖h1 ♗h6! 39.♖xb1 ♖c1! with a big advantage for Black> 37...Rc4 38.g4 Bc2 <possibly a little safer is 38...Qb4 with counterattack, forcing liquidation> 39.Rc1 Rf4 40.Re3 Bxa4 41.Rxc8 Qxc8 42.fxg7 Kxg7 43.Be2 Qc5 44.Rh3 <finally> 44...Kf8 and Black is safe enough with an extra pawn. <It seems that White needs one more tempo to make Bg5 a winner.> |
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| May-14-08 | | RandomVisitor: After 27...Bc4:
1: David Bronstein - Mikhail Botvinnik, Moscow-Wch 1951
click for larger viewAnalysis by Rybka 2.3.2a mp : <22-ply> 1. (0.48): 28.Ne3 Qe8 29.bxa5 Qxa4 30.Rxb7 Qxa5 31.Nxc4 Rxc4 32.h5 gxh5 33.Rc1 Kh8 34.Bf3 Rc7 2. (0.35): 28.Rec1 axb4 29.cxb4 Rfd8 30.h5 Qc7 31.hxg6+ fxg6 32.Qb2 Kh8 33.Rc2 Rf8 34.Rbc1 Qb8 3. (0.34): 28.Bf3 axb4 29.cxb4 h5 30.Ne3 Bh6 31.Bg5 Bxg5 32.hxg5 Kg7 33.g4 Rfd8 34.Kg2 Ra8 (, 14.05.2008)
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| May-15-08 | | RandomVisitor: 3 minutes a move analysis:
avid Bronstein - Mikhail Botvinnik [A04]
Moscow-Wch Moscow-Wch (14), 1951
[Rybka 2.3.2a mp ]
1.Nf3 e6
2.g3 d5
3.Bg2 c5
4.0-0 0.24/17 Nc6
5.d3 g6 0.26/15
6.e4= 0.17/17
[Rybka 2.3.2a mp : 6.c4 Nf6 7.Qc2 Be7 8.Bh6 Ng4 9.cxd5 exd5 10.Bg7 Rg8 11.Bc3 Kf8 12.h3² 0.26/15 ] 6...Bg7
7.Qe2 0.00/17 Nge7 last book move
8.e5 -0.10/15 Qc7= 0.03/18
[Rybka 2.3.2a mp : 8...h6 9.Na3 g5 10.Nb5 0-0 11.h4 g4 12.Nh2 h5 13.Bf4 Qb6= -0.10/15 ] 9.Re1 0.03/16 a6= 0.10/17
[Rybka 2.3.2a mp : 9...0-0 10.Na3 Qb6 11.c3 Bd7 12.Bg5 f6 13.exf6 Bxf6 14.Bxf6 Rxf6= 0.03/16 ] 10.c3 0.10/17 Bd7 0.10/17
11.Na3 0.10/17 h6 0.10/17
12.Rb1= 0.00/17
[Rybka 2.3.2a mp : 12.Nc2 0-0 13.Ne3 h5 14.b3 Rac8 15.Bb2 Qb6 16.d4 cxd4 17.cxd4 Bh6 18.Bc3= 0.10/17 ] 12...Nf5= 0.11/18
[Rybka 2.3.2a mp : 12...g5 13.Bh3 0-0 14.b4 cxb4 15.cxb4 Ng6 16.d4 Qb6 17.Nc2 Rfc8 18.Ba3 Nge7 19.Qd2= 0.00/17 ] 13.Nc2 0.11/17 Rc8 0.11/17
14.h4= 0.07/16
[Rybka 2.3.2a mp : 14.Ne3 Nxe3 15.Bxe3 Nxe5 16.Bf4 Nxf3+ 17.Qxf3 Qb6 18.Qxd5 g5 19.Bd2 Rc7 20.Qc4 Bc6= 0.11/17 ] 14...Qa5= 0.24/18
[Rybka 2.3.2a mp : 14...0-0 15.Bd2 h5 16.Bg5 d4 17.a3 dxc3 18.bxc3 Nce7 19.Ne3 Bc6 20.Nxf5 Nxf5 21.Bf6= 0.07/16 ] 15.a3 0.27/16 Qd8 0.27/18
16.Bf4 0.27/17 0-0 0.27/15
17.Ne3 0.21/19 Nxe3 0.22/20
18.Qxe3 0.22/19 Kh7 0.31/17
[Rybka 2.3.2a mp : 18...Ne7 19.Qd2 Kh7 20.b4 c4 21.Nd4 Qc7 22.dxc4 Qxc4 23.Rbc1 Nc6 24.Bf1 Nxd4= 0.22/19 ] 19.Nh2= 0.15/17
[Rybka 2.3.2a mp : 19.b4 d4 20.cxd4 cxb4 21.axb4 Ne7 22.Qd2 Nd5 23.Nh2 Qb6 24.Bxd5 exd5 25.Be3² 0.31/17 ] 19...Ne7 0.15/17
20.Ng4 0.15/17 Ng8 0.40/16
[Rybka 2.3.2a mp : 20...Nf5 21.Qd2 b6 22.Ra1 Ba4 23.b4 Qe7 24.Rab1 c4 25.d4 Bc6 26.Ra1 Ba4 27.Bf3= 0.15/17 ] |
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