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Istvan Bilek vs Axel Otto Ornstein
Albena (1976), Albena BUL, rd 8, Sep-??
Hungarian Opening: General (A00)  ·  1-0



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sac: 32.Rf6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 3 ·  Later Kibitzing>
Jun-22-08  Fezzik: Boy I missed this one. I thought it was insanely easy. I saw that 31.Rb2?? loses instantly to 31...Rxd5! But then I thought that simply 31.Qb2 will eventually win the b-pawn and White should be able to convert the extra pawn.

I missed the spectacular, and spectacularly messy line that Bilek found. I think, given the choice, I would still prefer 31.Qb2. What's wrong with my move?

Jun-22-08  dzechiel: White to move (31?). Material even. "Insane."

A quick glance of this position begs the question, "Why don't they just declare this game a draw?" Neither side appears to have a significant advantage, the pawns are evenly distributed, both kings on the h-file. So how does white bring home the point?

The only weaknesses I can spot in black's position is that, unlike white, the black bishop is not currently defended and the b-pawn is subject to attack. White has the b-pawn attacked once with he bishop, and can bring another piece to bear with...

31 Rb2

Here black can take one of two approaches. 1) defend the b-pawn again, or 2) play aggressively and go after the white king.

Should go for option 2, and try to bring it to the white king with 31...Qe1 White can play 32 Qb6, attacking both the black rook and the black bishop. So I prefer to think that black will play


in order to defend the pawn. Of course white cannot now play 32 Rxb7 because of 32...Qxb7 33 Bxb7 Rxd4 leaving black up a rook.

But at this point it appears that white can play

32 Qg4

breaking the pin on the d-file and attacking the black bishop. This should allow white to play 33 Rxb7 next.

What I have learned so far from this "simple" position, is that it's anything but simple. Both white and black have lots of tries, and it's unlikely that I have found the line from the game.

I'm gonna turn over all the cards now and peek at the score.


Glad I quit when I did, I don't think I would have ever found those first few moves. Outstanding play by Bilek.

Jun-22-08  dzechiel: <Fezzik: Boy I missed this one. I thought it was insanely easy. I saw that 31.Rb2?? loses instantly to 31...Rxd5!>

Boy is my face red! Good catch <Fezzik>

Jun-22-08  nateinstein: I saw Rf6, and the idea of h5, but I thought Rf6 right away worked. I didn't look too deep into it but I figured Rf6 had to be the only winning move - threatening capture of the bishop and taking h6 if the bishop moves. I'm trying to figure out how the end is a loss, looks like black can stay on the diagonal and capture the pawn when it gets to g8.
Jun-22-08  lost in space: Haven't got it today (as yesterday). Played around with 31. Rf6, 31. Rb2 31. Qf4 and 31. Qg4 and nothing worked out.

Hoping for Monday.

Jun-22-08  nateinstein: I put the endgame into the computer and it does see a win. The idea is to get the white king to h8 and the pawn to g7 and then move the bishop to h7 then g8 then c4 and close off black from staying on the diagonal.
Jun-22-08  SufferingBruin: I got moves 31-33 in order. Not bad for an under 1300 player.

So I got it right but I'm not sure I would've won. 'Cause, you know... I'm an U1300 player! :)

Seriously, this the first time I've ever "solved" an insane puzzle. I'm getting a drink.

Jun-22-08  weary willy: No - got the first move - but for the wrong reasons! Thought I could play 31 h5 Bxh5 32 Qh4 Qb6 33 c5 ... what am I missing?
Jun-22-08  Octal: I saw 31. Rf6 winning a pawn, but then I saw it drop a piece after Rxd5. So playing 31. h5 was necessary as now 32. Rf6 Rxd5 33. Qxd5 is simply losing for white.
Premium Chessgames Member
  al wazir: 31. Rf6 (my choice) is no good because I missed 31...Rxd5 (thanks, <Fezzik>).

But what happens after 31. h5 Bxh5 32. Rf6 Rxd5! ? Not 33. Qxd5 gxf6 34. Qxh5 Qd2+ 35. Kh3 Qg5 36. Qe8+ Kh7 37. Qf7+ Qg7, which looks favorable for black.

The winning line -- which is crucial to claiming the point, and which Bilek must have seen -- is 33. Rxh6+ Kg8 34. Qxd5+ Kf8 35. Rxh5. (Interesting that he *didn't* see 29. h5!)

I didn't get within a mile of it.

Premium Chessgames Member
  Jimfromprovidence: The move 31 h5 is extremely difficult to find. 31…Bxh5 looks best in response, but black can legitimately play 31…Be8 as well, which itself leads to a very messy, detailed continuation.

After 31 ...Bxh5 the rook sacrifice 32 Rf6, below, threatens Rxh6#, forces 32…gxf6 and wins a pawn. But is it enough to win the match?

click for larger view

I think black has a chance to draw with 50 …Ke7?!

click for larger view

This move forces white's bishop off of the e8 square, where it was simultaneously protecting the c pawn as well as controlling the h5 square.

The tricky part comes in after white is forced to play 51 Bd7. Now black can play 51…h5. This move has the effect of forcing white’s king to a worse position in order to continue to attack black’s h pawn.

IMHO, black will eventually exchange his h pawn for white’s c pawn, but his king should now be able to prevent white’s g pawn from queening.

That’s my story and I’m sticking to it.

Jun-22-08  slapwa: What's wrong with 32. Qh4?
Jun-22-08  AccDrag: Jimfromprovidence: in your line, 51.Bd7 is not forced. 51.c7! and Black will have to give up the P/h6 for white's c-P, and the ending will be like the game continuation.
Premium Chessgames Member
  Jimfromprovidence: <AccDrag> <51.Bd7 is not forced. 51.c7! and Black will have to give up the P/h6 for white's c-P, and the ending will be like the game continuation.>

Black will follow with 51...Bg4. White seems worse off to me here instead of playing 51 Bd7.

Premium Chessgames Member
  Once: Nope. Didn't get this one.

Rushing through the puzzle in 5 mins (I know, not enough for an insane), I found 31. Rf6 with the threat of 32. Rxh6. I spotted 31. ... Rxd5 in reply, but thought that black could wriggle out by playing 32. Rf8+. Except that you can't because the black queen sweeps back with 32. ... Qxf8 and white is down a bishop for nothing.

What we need to do is prepare the combination. 31. h5 deflects the bishop away from g6, so that we can play 32. Rf6. Then 32. ... Rxd5 loses to 33. Rxh6#

Hopefully with more time I would have spotted it, but no points for me today.

Premium Chessgames Member
  Honza Cervenka: 31.h5 Bxh5 32.Qh4 Qb6 33.c5 wins too.
Premium Chessgames Member
  Honza Cervenka: <What we need to do is prepare the combination. 31. h5 deflects the bishop away from g6, so that we can play 32. Rf6. Then 32. ... Rxd5 loses to 33. Rxh6#> This is not mate as there is no Bishop to cover g8, but after 33...Kg8 34.Qxd5+ the game is over.
Premium Chessgames Member
  triangulation: amazingly i got the first five moves. the first time i've come this close to solving insane. But i wasn't sure i could handle the ending or even if it was a won ending or not. <Fezik> qb2 is no good as after (i think) qc5 bxb7 rb8 , the pawn is not won.
Jun-22-08  PositionalTactician: Dang, I was thinking about 1.Rf6 immediately, but then saw 1...Rxd5!
Jun-22-08  sfm: As it says 1-0 instead of a move by Black I supposed he resigned, masterly seeing the clear end. Because it is won for White - right?
Jun-22-08  goodevans: <Honza Cervenka: 31.h5 Bxh5 32.Qh4 Qb6 33.c5 wins too.>

This looks way more convincing than the line played and doesn't even fall into the "insane" category.

Jun-22-08  vanytchouck: The weaknesses of the blacks :
The rook is not protect, as the bishop and the g7 pawn is only defended by the king. So i think first about attacking g7, by Rb2, by Rf7 or Rf6. I feared a check on the 2nd rank followed by Bf5+, but as long as the Rook is on the "f" file, there is no problem. Let's think a while...
Jun-22-08  Marmot PFL: This looks like an almost equal game with white to move. I found the Rf6 idea but that loses to Rxd5 and quit before looking at h5. Beautiful idea, and good endgame technique too. I think the ending is drawn with anything but a knight pawn but not certain.
Jun-22-08  melv: I saw the ideas of h5 and Rf6 but i failed to combine theme in the right way.
Premium Chessgames Member
  johnlspouge: Sunday (Insane): White to play and win.

Material: Even. The Black Kh8 has 1 legal move. Both Ks are defended by Ps with a weak light-square complex. The White Bd5 controls g8 and attacks Pb7; Qd4 pins Pg7 to Kh8; and Rf2 controls an open file, although its entry point f8 to the Black back rank is doubly controlled by Qb4 and Rd8. All three Black pieces are loose, with the White Qd4 on the same rank as Qb4 and same file as Rd8. The White Qd4 prevents Qb4 from giving check at b2 or d2, should Rf2 leave the 2-nd rank. The Black Pb7 is obviously vulnerable, but in attacking it, White would disorganize his forces for defense of Kh2.

Candidates (31.): Rf6

I found the defense...Rxd5 late in my move sequence, but did not realize that it blunted 31.Rf6 if played right away. Like <Marmot PFL>, I also found the move h5, but put the moves Rf6 and h5 together in the wrong order.

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