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| Aug-28-04 | | Whitehat1963: I don't see the finish. |
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Aug-28-04
 | | Chessical: Dolmatov is taking his d pawn without any compensation, and Lautier was probably fed up having allowed the possibility of <21.Rxf6!>. |
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| Mar-07-05 | | Giearth: The possible continuation (maybe): 23... Qe7 24.Qd4 f6 25.Qxd5+ and wins the bishop.
<samikd> Right, if 19... Qc8! there's no way white will come out with this combination. |
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| Feb-27-09 | | SamAtoms1980: I picked 21 Rxf6 with a view to 21 ... Qxf6 22 Ne6 or 21 ... gxf6 22 Qg3+. Dang. One move too soon. |
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Feb-27-09
 | | al wazir: I got it -- or I would have if black had played 22...gxf6. White then wins with 23. Qg3+ Kh8 24. Qg5. But I think that after I recovered from the shock of seeing 22...cxd5 I would have found 23. Rxd6. |
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Feb-27-09
 | | dzechiel: White to move (21?). Material even. "Difficult."
The battle lines are drawn and it should be immediately clear to all that the a1-h8 diagonal (particularly f6) will be instrumental in the upcoming combination. Lots of ideas to look at, I want to make a list of candidate moves: - 21 Rxf6
- 21 Ne6
- 21 Nc6
- 21 Nf5
I also considered moves like 21 Qxh7+, 21 Qg3, 21 Rf3 and 21 Rf4, but they don't hold out much promise. I desperately wanted to play 21 Rxf6 (and, who knows, that might still be the key), but once the black queen captured on f6, it seemed to me to be much too free in the aid of the castled king's defence. After much consideration, I think the key move is...
21 Nc6
Attacking the queen (moderately forcing) but also covering both d8 and e7. I don't think that black has much better than 21...bxc6 22 Rxf6
Recovering the piece. Should black play
22...gxf6
then
23 Qg3+ Kh8 24 Qg5
and black will have to give up the queen for a rook to stop the checkmate. But what else could black play on move 22? He certainly doesn't have to take the rook. Perhaps 22...Qe7
to protect the d-pawn. But this allows
23 Raf1
Bringing in the big guns. That's all I got tonight, time to check. |
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| Feb-27-09 | | whitebeach: One of the strange things about chess is the way many of us (meaning, I suppose, me and people like me, although maybe players rated 2700+ have the same idiosyncrasy) fall in love with a move and won't let it go. I didn't spend much time on tonight's puzzle, but the time I did spend was devoted to my passion object 21. Rxf6. Just couldn't stop trying to make it work, like some poor infatuated fool in a bad marriage. Oh well. |
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| Feb-27-09 | | MiCrooks: Don't stop as the only thing wrong with Rxf6 is that the in-between-move Nc6 is stronger :)! I too did not spend a lot of time initially and came up with Rxf6 Qxf6 Ne6 Q moves Nxg7 (you can play Nxf8 and have a slight advantage but I thought that with the opening of the Black King's defenses along with the diagonal for the Bishop White would win. After seeing the game move it was clear that Rxf6 seemed stronger here as Black now CAN'T recapture, but you sacked your Knight so he doesn't HAVE to recapture. Play through both lines against your favorite computer. White has an easy time of it in either case with the computer eventually seeing that you have more than adequate compensation for the exchange with the line culminating in Nxg7. In fact it recognizes that White has a slight advantage right of the bat, but then within a few moves you find that White can easily improve his position whereas Black cannot. It is not long before Black is in just as much trouble as he would be in the Nc6 line or more. |
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| Feb-27-09 | | MiCrooks: In the game cxd5 was a big blunder. In the position given Black is dropping the Bishop as well due to Qd4 threatening mate. No matter what Black's next move is the combination in some order of Qd4 and either Qxd5 or Rxd5 wins a piece. For instance Qe7 Qd4 f6 Qxd5+ Kh8 (or Qf7) Rxd7 or Rf7 Qxa8+. Or Kh8 Rxd5 Ra7 Qd4 winning the Rook. Instead of cxd5 a move like Rc8 allows Black to play on in a totally inferior position. Qg3 Qc7 Re1 Rfe8 Ref1 Re7 Bb4 and Black is going to start dropping material into a totally lost end game. |
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| Feb-27-09 | | MiCrooks: Giearth - I don't understand your point. If 19...Qc8 instead of Qd8 how is it that Black is better off? After Bc3 what does he to to contest the pressure down the long diagonal? The point of Qd8 was to be ABLE to play Bf6. As it turns out it didn't work, but not contesting it doesn't work either! What is your 20th move after Bc3? You can try something ugly like f6 but then White plays Rae1 and piles up on the e-file with a solid advantage. Your move does not solve any of Black's problems - hardly an ! move! |
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Feb-27-09
 | | Once: 
click for larger viewAn instructive unplugged today. The black Bf6 is clearly the target. But it turns out that taking with the rook is stronger than taking with the bishop. This is what happens: 1. Rxf6 gxf6 2. Qg3+ Kh8 3. Qg5!
click for larger viewBlack is royally stuffed as Bxf6+ cannot be prevented. Damage limitation for black 3...Rg8 4. Bxf6+ Qxf6 5. Qxf6+ Rg7. From the puzzle position, 21. Nc6 sets up this mating pattern with a gain of time by attacking the black queen. |
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Feb-27-09
 | | ahmadov: I was nowhere near solving this puzzle :( |
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| Feb-27-09 | | swarmoflocusts: I saw  xf6 fairly quickly after looking at some other candidate moves. It's clear that black can't take it (22...gxf6 23. g3  h8 24.g5 g8 (best) 25. xf6 xf6 26.xf6+ g7 27.xd6  ), so all that's left is to figure out how white wins when black declines the rook. After 22...c8 (the best move, according to Fritz and to me), 23.xd6 leaves white up a pawn, but with other significant advantages: His rook dominates the game, and after 23...c7 (best), 24.f6 cxd5 25.xa6, white's position is just improving.Of course, Lautier's 22...cxd5 turned a probably lost game into a dead lost one, as 23.xd6 e7 24.d4 f6 25.xd5 f7 26.xd7 xd5 27.xd5 leaves white up a full piece in addition to his pawn. (Other variations lead to the same destination.) |
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| Feb-27-09 | | zooter: 21.Ne6 nicely opens up a diagonal and threatens the queen, after 21...fxe6 22.Bxf6 probably forces gxf6 NOw 23.Qg3+ seems nice
but all this is just guesses and i'm going to take a peek now to see what the solution was and how many people got it right |
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| Feb-27-09 | | zooter: hmmm...Why couldn't I see Nc6 when I saw Ne6?
Why couldn't I think of Rxf6 instead of Bxf6? |
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| Feb-27-09 | | Samagonka: Instinctively, I was sure Rxf6 was a forceful move but I could'nt figure when to play it. I still need to look again to see how the final position is a winner for white. |
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| Feb-27-09 | | zb2cr: Bah. I figured 21. Rxf6 had to be the move. |
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| Feb-27-09 | | Giearth: User: MiCrooks: Firstly, The point of 19... Qc8 is to prevent 21.Nc6! I didn't mean it was the best move, but it was the only move to prevent the combination. ;) Secondly, my post was 4 years ago, surely you don't expect any reply!!! :D It was just pure coincident that I was free today and just wandering about CG.com. ;) BTW, I remember there was supposed to be <samikd> comment before. Where did it go? |
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| Feb-27-09 | | griga262: One thing that sets Dolmatov apart from everyone else is that he apparently started playing chess at least six years before being born. Consider these quotes on his profile page: (1) Years covered: 1953 to 2005
(2) Sergey Viktorovich Dolmatov was born on the 20th of February 1959 I am proud of my former countryman! |
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Feb-27-09
 | | johnlspouge: Friday (Difficult):
Dolmatov vs Lautier, 1988 (21.?) White to play and win.
Material: N for B. The Black Kg8 has 1 legal move, h1, on the same diagonal as the White Bc3. The Black Bf6 is on the same diagonal as the White Bc3, obscured by the White Nd4, and it is attacked by Rf1 along the semi-open f-file. The White Ra1 can reload Rf1. The White Qd3 has a semi-open rank. The White Kh1 is vulnerable to back-rank mates but is secure from checks. Candidates (21.): Rxf6, Ne6, Nc6
21.Nc6 (threatening 22.Rxf6)
Black can decline by moving Qd8:
(1) 21…Qc1 22.Rxf6 gxf6 23.Ne7+
(2) 21…Qe1 22.Rxf6 gxf6 [else, drop at least Pd6] 23.Qg3+ then Bxf6# Black can accept the sacrifice of Nc6:
(3) 21…bxc6 [Bxc6 is worse]
22.Rxf6 (threatening 23.Rh6 g6, with hopeless dark-square weaknesses in the K-position) 22…gxf6 23.Rf1 (threatening 24.Qg3+ Kh8 25.Bxf6+)
To avoid mate, Black must give up Q for B, leaving White with Q for B+R and positional advantage. |
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Feb-27-09
| | johnlspouge: < <Once> wrote: [snip] The black Bf6 is clearly the target. But it turns out that taking with the rook is stronger than taking with the bishop. [snip] > This type of decision became a lot easier for me, after I started explicitly deciding which capturing piece should remain after the smoke clears. The B kills the dark-square weaknesses in the K-position. |
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| Feb-27-09 | | MiCrooks: lol that's pretty funny! I didn't even notice that there were a couple of comments on the game from five years ago!! swarm - don't think that Rxd6 is best after Rc8. Qg3 looks better and even then after Qc7 (prob best) it seems better to pile on and create other weaknesses than it does to take the pawn. It's not going away! |
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Feb-27-09
| | Once: <johnlspouge: ... I started explicitly deciding which capturing piece should remain after the smoke clears. > John - that's an interesting distinction, for which many thanks. Our natural instinct is to think about the piece which does the capturing because that is the most active piece. But you are quite right that is more important to think the pieces that get left behind. I had not thought about it that way before. I recall a quote from an old chess book (I own far too many, at least according to my wife): the inexperienced player counts the number of pieces back in the box; the master focusses on the pieces remaining on the table. I suppose it's the same principle. |
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Feb-27-09
 | | agb2002: Four white pieces aim at the black castle and the QR could incorporate into attack via a3, e1 or f1. The convergence of the DSB and the KR on f6 suggests Bxf6 (after a knight move) or Rxf6. After 21.Rxf6 Qxf6 22.Ne6 Qg6, Black seems to have enough defense. Therefore, 21.Nc6: A) 21... bxc6 22.Rxf6
A.1) 22... gxf6 23.Qg3+ Kh8 24.Qh4
A.1.a) 24... Kg7 25.Qg5+ Kh8 26.Bxf6+ Qxf6 27.Qxf6+ Kg8 28.Ra3 . A.1.b) 24... Re8 25.Bxf6+ Qxf6 26.Qxf6+ Kg8 27.Qxd6 . A.2) 22... Qe7 23.Re1
A.2.a) 23... Qxe1+ 24.Bxe1 gxf6 25.Qg3+ Kh8 26.Bc3 . A.2.b) 23... Be6 24.Qg3 cxd5 (or 24... Kh8) 25.Qxg7+ Kxg7 26.Rfxe6+ . A.2.c) 23... Qd8 24.bxc6 Bxc6 25.Rxd6 Qc8 26.Qd4 f6 27.Qc4+ . A.3) 22... Qc7 23.bxc6
A.3.a) 23... gxf6 24.Qg3+ Kh8 25.Bxf6#.
A.3.b) 23... Qxc6 24.Rxd6 .
A.3.c) 23... Bxc6 24.Rxd6 followed by a queen’s side pawn roll combined with threats against the black castle. Perhaps, that’s enough to win (White is a pawn up and has much better position). A.4) 22... cxd5 23.Rxd6 followed by Rxd5 is similar to A.3.c). A.5) 22... c5 23.Qg3 followed by Raf1, h4, etc. 23.Rxd6 Qe7 24.Qg3 f6 looks less convincing to me. B) 21... Qc7 22.Bxf6
B.1) 22... bxc6 23.Qg3 g6 24.Qg5 followed by Qh6 .
B.2) 22... gxf6 23.Ne7+
B.2.a) 23... Kh8 24.Qd4 h6 25.Rxf6 Kh7 (25... Qc5 26.Rg6+) 26.Qf4 . B.2.b) 23... Kg7 24.Qg3+ Kh8 (24... Kh6 25.Rf4) 25.Qh4 . Time to post and check.
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| Feb-27-09 | | JG27Pyth: I thought it started Rxf6 and I couldn't find a good continuation...which isn't so bad, but after looking at the text, I still can't find the continuation. Head feels like an oil-soaked rag this morning. I'm going back to bed... wake me when it's Monday. |
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Later Kibitzing> |
