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| Aug-10-17 | | goodevans: 32.Nf6+ may be quickest but white looks to be in such total control that surely other moves win too. I'd have played <32.Qg6>. Is there a defence to that? |
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| Aug-10-17 | | clement41: Nice game by Spassky.
This Qe2/Rd1 plan is also seen sometimes in the open Ruy Lopez (known as the russian line I reckon).
It is interesting how the centre battle gradually turns in white's favour: white rightly avoids 10 cd? Nxd4 11 Nxd4 Qxd4 where black would have a strong bind against d3 and a nice outpost on d4.
Spassky trades on e6 only after (the clumsy enough) 11...Re8?! so that the rook gets funny there.
I like a lot 19 e5! taking space, fixing e6, and not rushing to capture on d4.
Spassky rightly leaves the tension by not taking with his pawn on b5; anyway if black takes on c4 his structure is torn apart.
Last, the knight is gorgeous on d6 where it both attacks and is a file-clogger.
These are positional considerations that no doubt underlay the tactics that finished Donner off. |
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Aug-10-17
 | | patzer2: Today's Thursday puzzle solution's first move <32. Nf6+!> seemed obvious to me as 32...Kf7 33. Qh5+ g6 34. Qxh6 +- (diagram below)
click for larger viewwins easily due to the threat of 35. Qh7#.
However, after <32...Kh8!?> Black sets a tempting little trap to entice 33. Qg6? = 0.00 @ 43 depth, Stockfish 8 (diagram below) 
click for larger viewwhich results in a forced draw by repetition after 33.Qg6? gxf6 34.exf6[] Rh7[] 35.Rd8 Nd5 36.Qe8[] Kg8[] 37.Qg6+ Kh8 38.Qe8 Kg8 39.Qg6+ Kh8 40.Qe8 =. White avoids the trap and wins instead with <33. Rd8!> Nd7 34. R8xd7 Rxd7 35. Nxd7 +- (+6.56 @ 32 depth, Stockfish 8.) |
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| Aug-10-17 | | malt: Got 32.Nf6+ Kh8 33.Rd8 Ref7 34.Qg6 R:f6
(34..gf6 35.Q:f7 )
35.ef6 gf6 36.Qf7 |
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| Aug-10-17 | | ChatGrognon: First one I got : ) |
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| Aug-10-17 | | catlover: The hard part of this puzzle if finding 32 Rd8. |
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Aug-10-17
| | patzer2: <catlover> I think you meant 33. Rd8 +-. |
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Aug-10-17
| | takchess: My 20cent intuition tells me whites moves are Queen g6 followed by Nf6+ followed by taking a rook and liquidating blacks position and perhaps leading to mate. |
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| Aug-10-17 | | Rama: Surely 33. ... Rc7, is a typo for Rf7? |
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| Aug-10-17 | | HaydenB: I had the pleasure of meeting Mr. Spasski in San Diego CA in August of 1986. What a wonderful man: witty charming urbane and dignified. It's so sad to see him in declining health these days at age 80. |
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| Aug-10-17 | | whiteshark: D'oh! Spoilt it w/<33.Qg6?=> |
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| Aug-10-17 | | Marmot PFL: Not even a sacrifice, 32 Nf6+ (with Rd8 coming) seemed like the obvious move and I couldn't find any defense (like Donner). The opening was interesting, but by move 20 it looks like white has won the fight for the center and then just builds up the attack. |
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| Aug-10-17 | | botvinnik64: Did anyone read Donner's The King, a collection of his (mostly) chess writing? Some fascinating, if not controversial, stuff. His recollections of Korchnoi and defection, especially. |
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Aug-10-17
 | | ChessHigherCat: <devere: However, after <32...Kh8!?> Black sets a tempting little trap to entice 33. Qg6? = 0.00 @ 43 depth, Stockfish 8 (diagram below)which results in a forced draw by repetition after 33.Qg6? gxf6 34.exf6[] Rh7[] 35.Rd8 Nd5 36.Qe8[] Kg8[] 37.Qg6+ Kh8 38.Qe8 Kg8 39.Qg6+ Kh8 40.Qe8 =.> I hate to contradict our silicone friend, but I just checked my line on WinBoard and it works (34. exf6 is obviously a bad choice): 32. Nf6+ Kh8 33. Qg6 gxf6 34. Qxh6+ Kg8 35. Rd8 (Ree8 36. Qg6+ Kh8 37. Rxe8) Rf7 36. exf6 Rxd8 37. Rxd8+ Rf8 38. Qg7# |
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Aug-10-17
| | ChessHigherCat: Here's another subvariant I forgot to mention: 32. Nf6+ Kh8 33. Qg6 gxf6 34. Qxh6+ Kg8 35. Rd8 Rf7 36. exf6 Rxf6 37. Qxf6 |
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Aug-10-17
 | | Jimfromprovidence: FWIW, I really liked the coordination of the white pieces. In this example, if 33...Nd7, below, white can take the knight with either rook and still protect the back rank.
click for larger view |
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Aug-10-17
 | | drollere: <Surely 33. ... Rc7, is a typo for Rf7?> apparently you and i are the only ones who have a problem with the ending. Rf7 was my expected continuation after Rd8 ... but that seems to make 35. Qxf6 irrational. (was it Qx(R)f7?) in the game record, 34. Rxf8# is all that is necessary if the rook really is on c7. |
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| Aug-10-17 | | catlover: <Patzer2><I think you meant 33. Rd8>. Thanks. Yes, that's what I meant. |
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Aug-10-17
 | | agb2002: White is one pawn down.
Black threatens Qxa2.
The first idea that comes to mind is 32.Nf6+:
A) 32... Kf8 33.Qh5+ g6 34.Qxh6 and the threat Qh7# wins (34... Rc8 35.Qh7+ Kf8 36.Qg8#). B) 32... Kh8 33.Rd8 (33.Qg6 gxf6 34.Rd8 -34.Qxh6+ Rh7- 34... Nd7) B.1) 33... Ref7 34.Qg6 gxf6 35.Qxf7 wins.
B.2) 33... Rb7 35.Qg6 gxf6 36.Qxf6+ Kg8 37.Rxf8+ Qxf8 38.Rd8 Qxd8 (38... Rf7 39.Rxf8+ looks even worse for Black) 39.Qxd8+ Kg7 40.Qf6+ followed by Qxe6 and the advance of the e-pawn seems to win. C) 32... Rxf6 35.exf6 wins decisive materal while keeping the attack. |
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Aug-10-17
| | patzer2: <Chesshighercat> After 33. Qg6? gxf6 34. Qxh6+?? (diagram below)
click for larger viewBlack wins with 34..Rh7 -+ (-6.82 @ 37 depth, Stockfish 8) when play might continue 35.Qg6 Nd5 36.exf6 Rg8 37.Qe4 Nxf6 38.Qf3 Qxf3 39.gxf3 Nh5 40.Rg1 Ng3+ 41.Kg2 Nf5+ 42.Kf1 Rxg1+ 43.Kxg1 Nxd4 -+ (mate-in-eight @ 55 depth, Stockfish 8.) |
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Aug-10-17
| | ChessHigherCat: <Patzer2> It's true that I messed up on that last variant because I forgot that the Rh7 allowed the Q to protect f8, but I still think 33. Qg6 works in this variant: 32. Nf6+ Kh8 33. Qg6 gxf6 34. Rd8 Ref7? Qxf7 |
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Aug-10-17
| | patzer2: Well, yes 32. Nf6+ Kh8 33. Qg6 gxf6 34. Rd8 Ref7? 35. Qxf7 +- (mate-in-seven, Stockfish 8 @ 46 depth) works due to the mistake 34...Ref7? which allows 35. Qxf7 +- (mate-in-six, Stockfish 8 @ 78 depth.) However, if we replace 34...Ref7? in that line with 34...Nd7! -+ (-2.64 @ 28 depth, Stockfish 8), White loses after 34...Nd7! 35. exf6 Rxd8 36. fxe7 Qxe7 37. Qxh6 Kf8 38.Qg6+ Kf8 39.Qh6+ Ke8 40.Qg6+ Qf7 41.Qe4 c5 -+ (-2.93 @ 24 depth, Stockfish 8) as play might continue 42.Qxc4 Qf5 43.Qxa6 Nf6 44.Re1 Kf7 45.h3 Rd2 46.Qb7+ Nd7 47.Qe4 Qxe4 48.Rxe4 Rxa2 49.Rc4 Rb2 50.Rc1 Kf6 51.Kh2 Kf5 52.Kg3 Rb3+ 53.Kf2 Kxf4 54.g3+ Ke4 55.Re1+ Kd5 56.Rd1+ Kc6 -+ (-5.50 @ 27 depth, Stockfish 8.) |
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Aug-10-17
| | ChessHigherCat: I was going to analyze Nd7 but I got distracted by the Championship. What about this: gxf6 34. Rd8 Nd7 35. exf6 Rxd8 36. fxe7 Qxe7 37. Qxh6+ Kg8 38. f5 Rf8 39. fxe6 Rf6 40. exd7 Rxh6 41. d8=Q+ Qxd8 42. Rxd8+ Kf7 43. Rd4 Re6 44. Kg1 c3 45. Rc4 Re1+ 46. Kf2 Ra1 47. Rxc3 |
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Aug-10-17
| | patzer2: After <33. Qg6? gxf6 34. Rd8? Nd7 35. exf6 Rxd8 36. fxe7 Qxe7 37. Qxh6+ Kg8 38. f5> (diagram below)
click for larger viewBlack wins with 38...Nf8 (not 38...Rf8? 39. Qg6+ Qg7 40. Qxg7+ Kxg7 41. Rxd7=) 39. Rf1 exf5 40. Qf4 c3 41. Qc4+ Rd5 -+ (-4.33 @ 31 depth, Stockfish 8) |
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Dec-25-17
| | sea7kenp: There are questions here, on whether 33 ... Rc7 is a misprint [for Rf7]. I have the Dover edition of the Tournament Book (edited by Isaac Kashdan), which is in Descriptive Notation. Black's 33rd is, indeed R-QB2 (or Rc7), with a note by Spassky: "33 ... R-KB2 [Rg2] also did not help in view of 34 Q-N6 [Qg6], with the double threat of Q-R7 mate [Qh7#] and QxR [Qxf7]". In other words, no Misprint. |
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Kibitzing
sac: 34.Qg6