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Tibor Tolnai vs Janis Klovans
Vienna Open (1991), Vienna AUT, rd 6, Oct-??
Spanish Game: Closed Variations. Flohr System (C92)  ·  0-1



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sac: 34...Rxf2+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Apr-19-08  whiteshark: Pretty neigh, but I missed <34...Rxf2!>. I'm pretty sure I would have found it if the position after 34.g3 would have been the starting point.
Apr-19-08  wals: Static Evaluation: Black has a Bishop pair v a light sq Bishop and a Knight. The open diagonals appear to favour Black. Black has two passed pawns, White 0. Black has three pawn islands, white has one? White has an isolated pawn on f5? Black's King is vulnerable to attacks via the light square diagonals.

Dynamic Evaluation: Some fancy footwork required here but what?

Bf7xc3 leads to Bd5+, Bxb5, Qxd5+, Kh8, Q returns guard duties on f3, pd5.

Reasonable moves, Bxb3, d6-d5, Ra2-a3, Qe5

Candidate move: Qe5,

31. ...Qe5 32.f5-f6 ...d6-d5


Yes, old gimlet eye missed , after Bb1, RxQe5 if Ra2-b2. Still I was poking around where the action was.

Analysis by Fritz 11:

1. (-1.96): 31...d6-d5 32.Be4xd5 Qb2-b1+ 33.Kg1-h2 Bf8-d6+ 34.g2-g3 Ra2xf2+ 35.Qf3xf2 Bf7xd5 36.Re3-f3 Bd5xb3 37.Qf2-d4 Qb1-c2+ 38.Rf3-f2 Qc2-c7 39.Rf2-f3 Bb3-c4 40.Qd4-e4 Qc7-e7 41.Qe4xe7 Bd6xe7 42.Rf3-c3 Kg8-f7 43.Kh2-g2 Kf7-f6 44.g3-g4

2. (-0.29): 31...Kg8-h8 32.Re3-c3 b5-b4 33.Rc3-c8 Kh8-g8 34.Be4-c2 Ra2-a3 35.Qf3-f4 Bf7xb3 36.Qf4xb4 Qb2-a1+ 37.Kg1-h2 Bb3xc2 38.Qb4-c4+ Kg8-h7 39.Rc8xf8 Bc2-b3 40.Qc4-c8 Qa1-e5+ 41.g2-g3 g7-g5 42.Qc8-c7+ Qe5-g7 43.Qc7xd6

(, 20.04.2008)

Apr-19-08  Marmot PFL: Didn't spend enough time on this to see both sacs (work 11 hours today). d5 diverts the bishop and the rook sac is a killer, showing the power of the 2 bishops on adjacent diagonals. Can't complain about losing a game like that, just praise the winner.
Apr-19-08  gprice: Of course once a player sees a clear
win why on earth would he analyze
anything else?
Apr-20-08  malvar: Great combination, I got 31..d5, 32, Bxd5, missed Qb1+. I tried playing it move by move and got most of them out anyway. I did get 34...Rxf2+ but; does, 38...Qa2 still win? Exchange the queens earlier? Perhaps as it was played, black squeezed more out of the position. I can't really say.
Sep-18-20  Walter Glattke: Black threatens Qh1#, if the white queen could get away from guarding. Therefore 34.-Rxf2+ 35.Qxf2 Bxd5 36.Re1 (or Re8+ Kf7 Re1) Qxb3 wins decisive material.
Sep-18-20  Brenin: Fairly easy for a Friday: deflect the Q from defending the B on d5 with Rxf2+, threaten mate on h1 by Bxd5, and pick the now hanging N. If the attack doesn't break through, force exchange of Qs, and the 2B vs R, with passed b pawn, will win the endgame.
Sep-18-20  Cheapo by the Dozen: This looks like an easy two-move puzzle to me.
Sep-18-20  Brenin: 41 ... Bf2 leads to mate in a couple of moves, but by then almost any Black move wins. White obliged with a quick resignation rather than enforcing (and enduring) a hopeless endgame.
Sep-18-20  mel gibson: Stockfish 12 says:

34... Rxf2+

(34. .. Rxf2+ (♖a2xf2+ ♕f3xf2 ♗f7xd5 ♕f2-e1 ♕b1xe1 ♖e3xe1 ♗d5xb3 ♖e1-c1 b5-b4 ♖c1-c6 ♗d6-e5 ♖c6-c5 ♗e5-d4 ♖c5-b5 ♗d4-c3 ♔h2-g2 ♗b3-c4 ♖b5-b8+ ♔g8-f7 ♔g2-f3 b4-b3 h3-h4 b3-b2 ♖b8-b7+ ♔f7-g8 ♔f3-e3 h6-h5 ♔e3-f4 ♗c3-f6 ♖b7xb2 ♗f6xb2 ♔f4-g5 ♗c4-e2 ♔g5-f4 ♗e2-g4 ♔f4-e4 ♔g8-f7 ♔e4-f4) +6.99/37 193)

score for Black +6.99 depth 37

Sep-18-20  goodevans: <Apr-19-08 goodevans: [...] Perhaps this was a bit easy for a Saturday.>

Possibly a bit easy for a Friday even.

Sep-18-20  agb2002: Black has the bishop pair for a bishop, a knight and a pawn.

White threatens 35.Bxf7+ Kxf7 36.Qd5+ winning the remaining bishop with check.

The white queen protects the bishop and the pawn on f2. This suggests 34... Rxf2+ 35.Qxf2 Bxd5 36.Rf3 (36.Re8+ Kh7 wins) 36... Bxb3 wins decisive material. For example, 37.f6 Bd5 38.f7+ Kf8 39.Qe3 (39.Qe2 Qa7 with a won ending) 39... Qe4 40.Qxe4 Bxe4 41.Rb3 b4 with a won ending.

Sep-18-20  vajeer: Not very difficult when you know that it is a puzzle and there is only one forcing move, so quickly found it. A good Sunday puzzle would be 31...Black to play. This nice combination started there and Black must have seen all this before playing 31...d5!
Sep-18-20  fporretto: How would White defend after 34...Bxd5? The White Queen can only protect both f2 and h1 from f3 and g2, and the Black Bishop on d5 would take both of them away.
Sep-18-20  Brenin: <fporretto>: If 34 ... Bxd5 then 35 Qxd5+ Kh7 (Kf8 36 Qxd6+ or Kh8 36 Re8+ lead to mate) 36 Nd2, and Black must lose a piece or the exchange by Rxd2.
Premium Chessgames Member
  catlover: Must be an easy Friday puzzle. I actually got it.
Sep-18-20  malt: Come up with 34...R:f2+ 35.Q:f2 B:d5 36.Re1 Q:b3
Sep-18-20  Cellist: I saw the solution but was not happy with it because I thought there might be something better and more complicated (especially considering that this is Friday). I then went for 34. ... Bxg3+, but it is disastrous for Black, regardless of whether White takes with the Q (better) or K. So, the lesson would be: if you see a winning move, do not get too fixated on finding a better one ...
Sep-18-20  Predrag3141: Black to play on move 34 was a very easy puzzle for a Friday. I guessed all the moves until I missed with 41 ... Bf2.

41 ... Bf2 move is technically stronger than exchanging queens (as played), but over the board I'd be with Klovans: Why not go up a clear rook within the next ten moves?

Sep-18-20  brainzugzwang: <Brenin> <fporretto: If 34 ... Bxd5 then 35 Qxd5+ Kh7 (Kf8 36 Qxd6+ or Kh8 36 Re8+ lead to mate) 36 Nd2, and Black must lose a piece or the exchange by Rxd2.>

I thought 34... Bxd5 was clearer but totally overlooked the Qxd5 in reply is check, giving White time to defend. "Overlook" probably should be my chess name ...

Sep-18-20  TheaN: As many have posted, not the most difficult Friday. The first move screams to be played and the followup is relatively straightforward.

After <34....Rxf2 35.Qxf2 Bxd5> Black threatens a very annoying mate on h1. Re8+ doesn't help. After 36.Re1 Qxb3 -+, or 36.Qe1 Qxe1 37.Rxe1 Bxb3 -+ White loses both pieces for the rook, and 36.Qg1? is a bit much after Qc2+ #4 with an awkward second rank mate to follow.

What I would consider an attempt to block Black's threat is <36.Rf3>. I wanted to play the flashy 36....Qd1?! here, assuming Rf3 can't move and is not indefinitely defendable, but after 37.Nd2 Bb4?! is inadequate, with 38.f6! White can simply ignore this threat as after 38....Qxd2? 39.Qxd2 Bxd2 40.Rd3 ± and too late after 38....Bxd2? 39.f7+ Bxf7 (Kh7 40.f8Q +-; Kf8?? 40.Qc5#) 40.Rxf7 ±. Instead 37....Bxf3 38.Nxf3 b4 ∓ Black's probably still winning, but <36....Bxb3 -+> is simply sufficient; albeit it gives some counterplay compared to what White tried.

Sep-18-20  TheaN: <vajeer: Not very difficult when you know that it is a puzzle and there is only one forcing move, so quickly found it. A good Sunday puzzle would be 31...Black to play. This nice combination started there and Black must have seen all this before playing 31...d5!>

It was used on 31....? as a Saturday back in 2008. That seems... fine. It's too forced for a Sunday; the combination plays itself following 31....d5 so it's just long, not tough. 34....? for a Friday is too easy. This is a Thursday at best, Wednesday would have been fine also.

Premium Chessgames Member
  Diocletian: I found the combination but could not play it. My mind's eye did not see that at the end White's Knight would be hanging: 37...QxN. I looked too hard for mate in a corner.
Premium Chessgames Member
  samvega: A bit like yesterday's puzzle. White's knight on b3 is defended three times, but proves vulnerable anyway. Yesterday, white's knight on c1 was defended five times, and still fell.
Sep-18-20  newzild: Missed it!

I went with 34...Bxg3+ 35. Kxg3 (35. Qxg3 Bxd5 is brutal) 35...Qg1+ 36. Qg2 (otherwise a king hunt) Qxg2+ 37. Kxg2 Bxd5+

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