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Boris Spassky vs Jan Hein Donner
Second Piatigorsky Cup (1966), Santa Monica, CA USA, rd 18, Aug-15
Spanish Game: Closed Variations. Worrall Attack Castling line (C86)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 34.Qg6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
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?

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.
Aug-10-17
Premium Chessgames Member
  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 view

wins 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 view

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 =.

White avoids the trap and wins instead with <33. Rd8!> Nd7 34. R8xd7 Rxd7 35. Nxd7 +- (+6.56 @ 32 depth, Stockfish 8.)

Aug-10-17
Premium Chessgames Member
  malt: Got 32.Nf6+ Kh8 33.Rd8 Ref7 34.Qg6 R:f6
(34..gf6 35.Q:f7 )
35.ef6 gf6 36.Qf7
Aug-10-17
Premium Chessgames Member
  ChatGrognon: First one I got : )
Aug-10-17  catlover: The hard part of this puzzle if finding 32 Rd8.
Aug-10-17
Premium Chessgames Member
  patzer2: <catlover> I think you meant 33. Rd8 +-.
Aug-10-17
Premium Chessgames Member
  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.
Aug-10-17  Rama: Surely 33. ... Rc7, is a typo for Rf7?
Aug-10-17
Premium Chessgames Member
  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.
Aug-10-17
Premium Chessgames Member
  whiteshark: D'oh! Spoilt it w/<33.Qg6?=>
Aug-10-17
Premium Chessgames Member
  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.

Aug-10-17
Premium Chessgames Member
  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.
Aug-10-17
Premium Chessgames Member
  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#

Aug-10-17
Premium Chessgames Member
  chrisowen: Mob vim bucks f6s favorus h8s harangues bond bad d8s danghoods pjs hoist vims hup jones photon jive plush jig hip jam happy jar bag c7s clanghot bad gad 33...Nd7 dies okay danghove 3 aorta gap luv ohs gaff 34.Qg6 gxf6 35.Qxf6+ ado and fauston erm 7 8 aorta gap luv ohs c3s acts vet back f8s flagonact vet won key q danglog boff knight vide ave mob hand kin vim v c rid dips got wus boggle oys flow gay fun guv nub jzs aoen flux i hqs g4s goods mob vim bucks f6s favorus blink ins kevlars teel grip oks vow vis crank vam vcr c rid ide then display pass dips pat boggle got pot wot v oys flow gay luft lovely fun guv nub vim jzs aeon flux i hqs g4s goods vis its vint wus hes viva vim its v thin wes viva u went huv ins view hunt wive hunt wine uhs tvs vet uhs win f6s favorus bad of too it 32.Nf6+ hulls flashon branch vam hall has boat brash vat blotch boosh hob hoh hah lob lab f6s favorus flashon fallout oks von guv vis faraway fat vow foot tooth fort undone flat boff doff fog flash hoof gaff flog hog hang divide into fifths fife river over and f8s flagonact vet lift iffy foot bad o 31...bxc4 don crack fess vam clack 3 aorta gap luv ohs hah o 31...Kh7 duff etc harangue 1 aorta gap luv ohs ha too it 32...Kh8 33.Rd8 Rc7 vim bod crangvam dies oks vow clanghot bad gad 33...Nd7 dies okay danghove 3 aorta gap luv ohs vim gaff 34.Qg6 gxf6 35.Qxf6+ ado and fauston erm 7 8 aorta gap ohs c3s acts vet back f8s flagonact vet won key q danglog boff knight vide ave mob hand d8s danghoods wons event ado blotches hod had djs dob dabs brash vam jobs worth hood ramp moon dint vim clangeve fag punt babel bottle drank vam bands play das vis kiss inky rod afar hang vim daffy dock band jan call plans mend fast flash floss oks von guv boff doff dab bad fad fab hang hog d8s danghoods vide flash daffy doff clock clack cack caddy cod doc dock bag bogs ums face jive best cuff goes beauty faggaff hang mob vim bucks f6s fallout;
Aug-10-17
Premium Chessgames Member
  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
Aug-10-17
Premium Chessgames Member
  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

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.

Aug-10-17  catlover: <Patzer2><I think you meant 33. Rd8>.

Thanks. Yes, that's what I meant.

Aug-10-17
Premium Chessgames Member
  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.

Aug-10-17
Premium Chessgames Member
  patzer2: <Chesshighercat> After 33. Qg6? gxf6 34. Qxh6+?? (diagram below)


click for larger view

Black 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.)

Aug-10-17
Premium Chessgames Member
  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

Aug-10-17
Premium Chessgames Member
  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.)

Aug-10-17
Premium Chessgames Member
  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

Aug-10-17
Premium Chessgames Member
  patzer2: After <33. Qg6? gxf6 34. Rd8? Nd7 35. exf6 Rxd8 36. fxe7 Qxe7 37. Qxh6+ Kg8 38. f5> (diagram below)


click for larger view

Black 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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