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Tomi Nyback vs Tiger Hillarp Persson
Solett Open (2001), Skelleftea SWE, rd 4, Apr-12
Zukertort Opening: Kingside Fianchetto (A04)  ·  1-0



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sac: 31.Qxd6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Apr-06-21  Viennablue: 27.Qxb4?? and 27...Kg7?? And 29...Qd4?? must be mistakes in the transcript; each of these moves simply loses a major piece
Premium Chessgames Member
  agb2002: White has a bishop and two pawns for a knight.

Black threatens Nxb4, Nxe7 and Rxb4.

The black queen and the pawn on d6 are defenseless. Therefore, 31.Qxd6:

A) 31... Nxe7 32.Qxd6 wins decisive material.

B) 31... Qxc4 32.Qg6+ Kf8 33.Qxf7#.

C) 31... Rh6 32.Rxf7+ Kxf7 33.Bxd5+ cxd5 34.Qxb8 Rb6 35.Qxb6 Qxb6 36.a7 is winning.

D) 31... Rhd8 32.Qg6+ Kh8 33.Qh5+ and mate in two.

E) 31... Qf6 32.Rd7

E.1) 32... Qxb2 33.Qg6+ Kf8 34.Qxf7#.

E.2) 32... Qxd6 33.Rxd6 Rxb2 34.Rxc6 wins decisive material.

E.3) 32... Qxf5 33.Qxc7 looks crushing.

Apr-06-21  Brenin: The moves from 27 to 30 are nonsense, with White's Q standing en prise on b4 to the R on b8. Clearly there is something wrong with the transcript here. The move 21 ... Rb8 looks odd, but if it had been the plausible Rd8 then 31 Qxd6 would have been suicidal. Very puzzling!
Apr-06-21  mel gibson: Damn - I didn't see it because I failed
to see that the pawn on f7 would be pinned.

Stockfish 13 says:
31. Qxd6

(31. Qxd6
(♕b4xd6 ♕d4-f6 ♕d6xf6+ ♔g7xf6 ♖e7-d7 ♔f6xf5 ♖d7-d6 ♔f5-e5 ♖d6xc6 ♘d5-b4 ♖c6-c5+ ♔e5-d4 ♖c5-c7 ♖h8-f8 a6-a7 ♖b8-c8 ♖c7xc8 ♖f8xc8 ♗c4-e2 ♘b4-c6 a7-a8♕ ♖c8xa8 ♖a1xa8 f7-f5 ♔g1-h2 ♘c6-e7 ♖a8-f8 ♔d4-e5 ♔h2-g3 ♘e7-g6 ♖f8-e8+ ♔e5-d4 ♖e8-g8 ♘g6-f4 ♗e2-f1 ♘f4-e6 b2-b4 g5-g4 h3xg4 f5xg4 ♖g8xg4+ ♔d4-e5 ♗f1-c4 ♘e6-c7 ♔g3-f3 ♔e5-d6 ♖g4-g6+ ♔d6-e5 g2-g3 ♔e5-f5) +8.96/35 160)

score for White +8.96 depth 35

Apr-06-21  TheaN: Saw the game line, the answer to Nxe7 and Rh6 after <31.Qxd6 +->, but missed the rather simple 31....Qf6.

31....Qxc4 32.Qg6+ #1 is obviously not possible, requiring to see the pin. 31....Nxe7 32.Qxd4+ +- is technical better but not by much, and 31.....Rh6 32.Rxf7+! Kxf7 33.Bxd5 cxd5 (Qxd5 is worse) 34.Qxb8 Rb6 35.Qc7+ (Qxb6 works too) with 36.a7 +-.

31....Qf6 seems to hold for a while, but what's the thorn (a6) for Black will now infest. 32.Qxf6+ Kxf6 33.Rd7! essentially pins Nd5 to f7, and a simplification allows White to bolster the a-pawn, ie 33....Rbd8 (Rhd8 34.a7 +-) 34.Rxd8 Rxd8 35.Bxd5 cxd5 (Rxd5 36.a7+) 36.b4 and Black will have to confine both pieces to the queen side, the White king can just advance on the king side and win.

Apr-06-21  Lord Byron iii: Can some one pls explain why Black doesn't play ...Rxb4? Thank you.
Apr-06-21  mel gibson: <Apr-06-21 Lord Byron iii: Can some one pls explain why Black doesn't play ...Rxb4? Thank you.>

Good question.
It was a blunder on move 30 for Black.

Stockfish 13 says:

30... Rxb4

(30. .. Rxb4 (♖b8xb4
♖e7xf7+ ♔g7-h6 ♗c4-d3 ♖b4xb2 ♖a1-f1 ♘f6-h5 ♖f7-b7 ♖b2-d2 ♖b7-e7 ♕d4xd3 ♖e7-e6+ ♔h6-g7 ♖e6-e7+ ♔g7-f6 ♖e7-e6+ ♔f6-f7 ♖e6-e3 ♕d3-d4 a6-a7 ♖h8-a8 ♖e3-f3 ♘h5-f6 ♖f1-b1 ♖a8xa7 g2-g3) +12.44/28 31)

score for Black +12.44 depth 28

Apr-06-21  Brenin: <Lord Byron III>, <mel gibson>: Moves 27 to 30, if true, would have been a succession of blunders by two GMs, as the White Q remains en prise throughout this sequence. Clearly there is an error in the transcript.
Apr-06-21  Cellist: I decided for Qxd6 after considering for a long time Rxf7+ and only then Qxd6. But with Rxf7+, White does not seem to have enough power and speed to force mate. The engine gives it 0 through perpetual check.
Premium Chessgames Member
  chrisowen: Ogle ovid Qxd6 gobble abridge blushy vint latch aids hats guvs ogle ovid jaffas flog mowgli ivory glob bint quirky wracks vant dew it wed viper phz its few cams ivory mat on bet rip x pugilist totadd eggs ends gaff jaffas afford who it be Qxd6 ear;
Apr-06-21  1g1yy: <al wazir: I found 31. Qxd6 with no trouble, but I didn't see what white does after 31...Qf6. I still don't.>

Same here. I was ready to concede I couldn't find the solution. Black has to completely fall asleep at the wheel for this to work. Maybe this game was started at 4:30am or something. There's simply no way a GM missed a hanging pawn followed immediately by blundering into a forced mate in 2 to follow. 8~

If this was Puzzle Rush and I was to find black's defense, I would have Qf6 in about 2 sec... As I did in the exercise, and was unable to find White's attack...

Apr-06-21  Brenin: <1g1yy>: After 31 Qxd6 Qf6 32 Qxf6+ Kxf6 33 Rd7, White has a huge advantage: three pawns up, with the P on a6 hanging over Black like a sword of Damocles, and the N on d5 pinned, I think it is White who would have to fall asleep at the wheel to fail to win.
Apr-06-21  Walter Glattke: Yes, I confirm, 30.-Rxb4 31.Rxf7+ Kh6 32....resign!?
Apr-06-21  King.Arthur.Brazil: I followed fish house up to 30...♖xb4 31. ♖xf7+ ♔h6 32. ♗d3 ♖xb2 33. ♖f1 ♘h5 34. ♖b7. Here, the King recommends: ♖xb7 35. axb7 ♖b8 36. ♗a6 ♘g3 37. ♖e1 ♘e4. With 38...♘c5 attacking the ♗a6 and the ♙b7 together with 38...♕xf2+ and K-side attack the game is easily over. For example: 38. ♖f1 ♘c5 30...♖xb4 31. ♖xf7+ ♔h6 32. ♗d3 ♖xb2 33. ♖f1 ♘h5 34. ♖b7 ♖xb7 35. axb7 ♖b8 36. ♗a6 ♘g3 37. ♖b1 ♘e4 38. ♗f1 ♕xf2+ 39. ♔h1 ♘g3+ 40. ♔h2 ♘xf1+ 41. ♔h1 ♕xf5 or 38. ♖f1 ♘c5 39. ♗e2 ♖xb7.... The Black need not to give to White any chances. However, after the called "best" 31...♕f6 32. ♕xf6+ ♔xf6 33. ♖d7 ♖bd8 34. ♖b7 ♖b8 35. ♖xb8 ♖xb8 36. a7 ♖a8 37. g4 ♔e7 38. ♖a6 ♔d7 39. ♔f1 ♔c7 40. ♗xd5 cxd5 41. ♖f6 ♖xa7 42. ♖xf7+ ♔b6 43. ♖xa7 ♔xa7 44. f6 Sometimes, due to time pressure, such blunders happens: the victim committed incredible mistakes and lose the game or received check-mate. Playing against computer teaches you to don't play uncalculated attacks exploring time, because it will not blunder, more over against Chessmaster, it will punish you quickly.
Premium Chessgames Member
  dorsnikov: That WAS NOT easy?
Premium Chessgames Member
  drollere: i found the basic line 31. Qxd6 (to release the Q, and prevent Nxe7) Qxc4, 32. Qe5+ Kf8, 33. a7, and a variety of mates branch out from the position.
Apr-06-21  TheaN: I'm pretty certain the transcript is missing 24.a7 Ra8 followed by the text moves. This also explains why Black's reluctant to play Qf6, given the rooks are confined to the pawns already and the simplification is dead lost:

This would be the puzzle position.

click for larger view

32.Qxd6 Qf6 33.Qxf6+ Kxf6 34.Rd7 Kxf5 35.Bxd5 +-.

Premium Chessgames Member
  gawain: I overlooked the fact that Black's f7 pawn is pinned, making g6 a safe landing spot for White's queen.
Premium Chessgames Member
  gawain: Oh! I see the problem with the moves leading to the puzzle position. White Q is en prise at b4. Did not affect the puzzle though.
Apr-06-21  1g1yy: <Brenin>
The way I see the exchange, White ends with a pawn hanging, a rook hanging, Black's N is not pinned... Idk, it surely looks more promising than the #2 black chose. Lol.
Apr-06-21  messachess: Did not see the pin on f7.
Premium Chessgames Member
  ajk68: 26...Ra8 27. a7 Kf8 28. Qxb4 Kg7 29. Nf5+ Bxf5 30. exf5 Qd4 31. Rxe7 Nd5 32. Qxd6 Qxc4 33. Qg6+ seems like a more plausible game line than what is currently in the text - which must be mistaken.
Apr-06-21  Brenin: <1g1yy>: "White ends up with a pawn hanging": if 33 ... Kxf5 then 34 Rxf7+ and White is still 3P up with majorities on both wings; if 33 ... Rxb2 then 34 a7 Ra8 35 Rxd5 cxd5 36 Bxd5 and Black must lose the R on a8. "White ends up with ... a rook hanging": not after 33 Rd7. "Black's N is not pinned": admittedly 33 ... Ne7 protects the P on f7, but after 34 Ra5 Black is running out of moves and has nothing better than 34 ... Nd5. The engine's verdict after 33 Rd7 is +5.99; I call that a huge advantage.
Apr-07-21  Brenin: <TheaN>, <ajk68>: I'm sure you are both right about the missing text moves, except that they should be 27 a7 Ra8, not 24 a7 Ra8 (before a6 has been played), as claimed by <TheaN>. Subsequent moves then make much more sense.
Apr-07-21  1g1yy: <Brenin>
I don't have access to clock data so I can't speculate on maybe Black having 5 sec remaining or something. All I did was look at the way it played out and still, I'm sorry, but I cannot believe a GM made these moves. I tend to agree with <Viennablue>, there simply has to be an error in the transcript.

I haven't taken a look at this with Chessbase, and the odds of me getting time to is slim. I left work last night and went home and straight to bed. My only time to check this stuff out is at work, and that's tenuous at best. My PC here has trouble with this site, so loading chessbase on an old XP system ain't happen'n! :D

If I am black in this position shown at 33.5 and black to move, the LAST thing I'm playing is QxB. After Qf6, I may be wrong here but I would figure W to play QxQ, then KxQ. Now with W to move, they can protect either the pawns or the rook, the pawns at b2 and f5 are hanging, the N is not pinned, nor unprotected, the rook is under attack from the king and unprotected. The Q side pawns are very far apart and soon to be only one, the A pawn. I'm not saying Black's position is all peaches and cream, but it's certainly ok to play on a bit... After Q takes B and mate is inevitable, there's not much for us to discuss, I agree with you then...

PS. I watched a video recently where John Bartholomew was playing a GM, and admittedly, time was a factor. But he won from a position I believe was down -18 or so and HE was the one in time trouble. So I get it, GMs do blunder occasionally, but come on... there's missing some obscure discovery or fork; then there's missing your king in the middle of the board with a R and Q slobbering on his coat, and you move your own Q away from any possible defense. Huh?? I'm just not buy'n it in an OTB game between GMs.

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