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Aug-06-08
 | | patzer2: For today's puzzle solution, Botvinnik wins the exchange and the game with 26. Nf6+!, whose purpose is to deflect and force the removal of the Queen's guard over the under-protected Rook at c7. After the double attack 26. Nf6+! Kh8 27. Ne8!  (threatening mate or the capture of the Rook), he accomplishes this objective and secures a clearly decisive material advantage. |
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| Aug-06-08 | | TheaN: 3/3
Please give me the verdict of my line. I think it's pretty strong and maybe even as crushing as Ne8! which I strangely enough missed. -ML-
<26.Nf6†!>
Obvious, although taking note that White's Queen is putting Rc7 en prise and needs his Queen to protect it. /A\
<26....Qxf6 27.Qxc7 >
Unnecessarily too quick to give the exchange like that. /B\
<26....Kh8 27.Bxh7?!>
I don't know. <lost in space> lists Ne8 as a simple 'better than Bxh7', but White can most defenitely play this move, even though it's not very forcing. Qxf6 still leads to Qxc7 so I leave it out. /B\/A\
<27....gxf6 28.Qg8‡ 1-0>
Taking the Knight is a very bad idea.
/B\/B\
<27....Nxh7 28.Nd5!>
But taking the Bishop is a bad idea, as Black will lose quite some material now. Black has to give up the Rook as... /B\/B\/A\
<28....exd5? 29.Rxe7 Rxe7 30.Qxb8 >
...the other Rook was also on that diagonal, a feature I did notice to justify Bxh7. So Black must go with a Queen move, of which taking the pawn seems to regain the most. /B\/B\/B\
<28....Qxc5 29.Qxc7! >
White threatens Qxb8 and Qxc5, and the Knight on d5 is also defended, so Black MUST defend it or trade Queens, both which give White a clear decisive advantage. So Black should not accept the sac. /B\/C\
<27....? >
Black should keep his Knight on f8 to avoid the mating pattern with Queen and Bishop, but White is nonetheless threatening Nd5, Qh3 and Qh4, and I can't see a good move against all of them. g6 is met by Qh4! to use the pin on the Queen (instead of gaining the exchange by Nd5, although winning). Black should either accept the exchange loss by Qxf6 or Nxh7 as shown before, or come up with something I do not know. Unless someone gives a clear analysis or computer analysis of a refutation below exchange level (~+2.00) I'll not give myself the point. |
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Aug-06-08
 | | OhioChessFan: Nice tactic. I guess it was an easy Wednesday since I got it immediately. |
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| Aug-06-08 | | Hafen Slawkenbergius: <TheaN> I wonder about 27...Qxc5 in your line. It takes the sting out of Nd5, and I suspect that with h7 defended, Black can take the knight with impunity if the queen moves to the h file. |
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| Aug-06-08 | | TheaN: <I wonder about 27...Qxc5 in your line.> <28.Ne8...>
Ironic. Only debatable whether this is 1) improving 27.Ne8, 2) if I would've seen Ne8 this time and 3) if there is no better alternative for Black (or White, for that matter). I'm not doubting point one, Ne8 is untouchable now, so Black must defend g7 and White will win at least the full Rook back and destroy Black's position after his g6, so it is better. Point two is not really the point: obvious move but only play would've told it. I was fearing point three in view of <27....Qd8>, but it seems that this just overworks the Queen, as 28.Ne8 is still possible, due to the same threats and Qxe8 is still Qxc7 with the threat of Qxb8, but this is not really different compared to 27.Ne8. |
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Aug-06-08
 | | DarthStapler: It took me a while but I got it |
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Aug-06-08
 | | MarkThornton: I once lost to a similar tactic, about 25 years ago. My opponent was very pleased to play "Ne8 1-0", and showed the finish to anyone who would listen to him. I was quite embarrassed! Now I know that this tactic has a distinguished pedigree, I feel a bit better! |
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Aug-06-08
| | guybrush: 28. Ne8. What a move! Didn't see that one. |
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Aug-06-08
 | | Domdaniel: A nice point is that the black Queen is horribly placed after 27.Ne8 Qxe8, a fact that helps White to end the game quickly. It's as important as winning the exchange. |
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Aug-06-08
| | A.G. Argent: <DaveZ, Once, soren..."cute"> Hrrumph. |
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Aug-06-08
 | | YouRang: Not too hard. I saw the key components pretty quickly: - Our Q attacking the black rook
- Black's Q is the sole guard of the black rook (so it is subject to deflection tactics) - The g7 pawn is pinned (if we move our knight).
These ingredients all suggest 26.Nf6+!, since the knight can't be taken by the g7 pawn (it's pinned) nor the queen (without losing the rook). Hence, we must expect 26...Kh8. Here is where I spent more time thinking about it than I should have. I couldn't make captures of the h7 pawn work, nor would attacking g7 via Nh7 work. But I did finally consider attacking g7 from the other angle: 27.Ne8!, creating a tactical fork (lose full rook or get mated), forcing the queen deflection: 27...Qxe8, thus allowing 28.Qxc7, winning the exchange. |
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Aug-06-08
| | Domdaniel: Botvinnik was aged just 17 when he played this beauty - almost 20 years before he became world champion, and he was still creating brilliancies in the late 1960s. |
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Aug-06-08
 | | kevin86: The theme here is that black's queen is overworked;she is forced to guard the rook and f6 square as well. I missed this one by a mile! I was looking at Nh6+ instead,but I don't see a second punch after Kh8 |
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Aug-06-08
 | | lost in space: Hi <TheaN:>,
I found 27. Bh7 not so strong due to the following line: 26. Nf6+ Kh8 27. Bxh7 Bb7 28. Nh5 (do you see a better one) f6 29. Bd3 Qxc5 |
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Aug-06-08
| | lost in space: Hi <TheaN>,
I was in a hury during my last post, so now with more time. The key issue with 27. Bxh7 is that Black get time to take controle of the important square d5, not allowing Nd5. After 27...Bb7 I don't see a real good move for white. 28. Nh5 is threating mate and keeping a white advantage. 27...f6 Black is threating to take the Bh7. Now white can play 28. Bd3 or 28. Bf5. Both is answered with Qxc5 with advantage white, but I don't think that the position can be called "won for white". A small remark: 28. Bf5 e5?! Nf4 and Black is in trouble. This is what I meant with 27. Ne8 is stronger than 27. Bxh7 |
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| Aug-06-08 | | 456: Tuesday puzzle Aug-05-08 <9. ?> Motylev vs A Czebe, 2008 |
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| Aug-06-08 | | TheaN: <lost in space>
Seems like you're right. As I've analysed with Qxc5 and Qd8, 27.Ne8 is at least a lot faster, but 27....Bb7 indeed seems to hold White of, Black seemingly worse, those. No point for me it seems; thanks for the confirmation. |
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Aug-06-08
| | Kasputin: White has lots of action around black's king but what specifically should white do? Candidates:
26. Bxh7+
It looks like black has this covered (the f8 knight protects h7) but it does allow white to bring the e1 rook up the board. 26. Nh6+
The knight is immune from capture but then what?
26. Nf6+
Black's c7 rook is protected by the queen, but if black takes this knight, then the c7 rook can be captured. 26. A queen move - e.g., to h3, d3, etc... This kind of thing looks slow (why reposition the queen?) - also it allows the c7 rook to move (e.g. to capture white's c-pawn) because it voluntarily breaks the pin on the rooks 26. A rook move - I don't see any immediate benefits but this could could be looked at if necessary. ----
26. Nf6+
And black is faced with a) moving the king to h8 or b) playing ...Qxf6 a)
26 ...Kh6
27. Ne8 threatening mate
27 ...Qxe8 is essentially forced or else black goes down an entire rook
28. Qxc7
It looks bad for black. Black is down more than just the exchange. All black's pieces are on the back rank. White has a nice centralized bishop (which incidently prevents black from playing ...Ra8 or ...Rb7). Plus white has a passed pawn and threatens black's a-pawn as well. b)
26 ...Qxf6
27. Qxc7
And really the position is similiar to a) above. Except here black's c8 bishop is in trouble if the b8 rook moves away. The other thing that might be worth pointing out is if black allows white to capture the c7 rook without capturing the white knight (e.g., after 26. Nf6 Kh1; 27. Ne8 Ng6), then white may be better off taking the rook with the queen instead of the knight. But that could be looked at more closely if black actually allowed the straight rook capture rather than the exchange trade. |
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| Aug-06-08 | | Duck McCluck: Does anyone else get that google-ad about $4 gas? Is it because of my firefox/google toolbar? Or is it a chessgames ad? It says "ads by google" and google used to only use keywords, and not banners? |
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| Aug-06-08 | | permutation: 27Nh5 also threatens mate but is not so forcing, as white has the resource of (after g6 or g5)...28Qe5 f6 and white still has work to do. 27Ne8 is the key move, then.
ps it's 12.30pm here and it's too late
to be clever. |
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Aug-06-08
| | Woody Wood Pusher: Master Chess (32 bit 20 MHz) sees this one instantly but 27 Ne8 took me a little longer. |
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Aug-07-08
 | | Gilmoy: <johnlspouge: I had failure of board vision on 28.Bxh7+, which is <not> check ... I note <Gilmoy> had the same lapse.> Oh, I knew it wasn't check -- I wrote it correctly as 28.Bxh7 (see my post). It was a clearance sac, not a demolition sac. |
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| Aug-07-08 | | Marmot PFL: I would miss this OTB. Only saw it here after looking at every move to deflect the BQ from Rc7. |
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Dec-17-09
 | | acirce: Glad there are some easy clues so that us cretins have a chance from time to time. |
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| Dec-09-11 | | Penguincw: 27. e8 was a nice deflection move. |
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