Borislav Kostic vs Heinrich Wolf (1922)

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Borislav Kostic vs Heinrich Wolf
Teplitz-Schonau (1922), Teplice-Sanov CSR, rd 4, Oct-05
Queen's Gambit Declined: Vienna. Quiet Variation (D44) · 1-0

ANALYSIS [x]

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Annotations by Stockfish (Computer). [35436 more games annotated by Stockfish]

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< Earlier Kibitzing · PAGE 1 OF 3 · Later Kibitzing>
Oct-30-07		tacite: If someone says « got all the moves! », he better get himself the story about a young boy named Pinocchio.

Oct-30-07		al wazir: It certainly took Kostic long enough to win his won game. Why didn't he play f4, Kf2, Nb5, Re1, Rbd1, Nd4, etc. ?

Oct-30-07		mkrk17: Not sure why this is a puzzle..that too on a tuesday. I saw Qxh7+ but it was not straight cut. Then i figured that Bxg6 gets back the piece for white. If black takes with either pawn, then he loses a rook by Qh7+ Rxh7, Nxe8+ and then Nxc7.

Oct-30-07		TrueBlue: I saw that Qxh7+ wins a rook for white, which happens to be enough

Oct-30-07		bakuazer: <tacite:If someone says « got all the moves! », he better get himself the story about a young boy named Pinocchio.> you don't have "to get all the moves". The puzzle is easy. One needs to notice (keep in mind) important d5 move (protects the night, after d6!) after which black's position is hopeless.

Oct-30-07		MostlyAverageJoe: <mkrk17> Nope, the f7 pawn is absolutely necessary to stay where it is, beacuse it prevents black R from retaking the N after white N takes black Q. No way this is a Tuesday level. Most of Tue puzzles are solvable by an 800 ELO player, and the solution is good enough that the resulting position should be winnable by such player. Consider this line: 25. Qxh7+ Kf8 26. Nxe8 Kxe8 27. Qg7 Rf8 28. Bxg6 Qe7 and the resulting position: click for larger view The above is still not a clear win at the 800 ELO level, IMHO. The puzzle causes a really bizzarre behavior in my favorite engine. Yes, it finds the first move OK at first, but then the evaluation starts going down with the increasing depth of the analysis. For example, at 10 second runtime and 2300 ELO setting (which would be normally a Wed level, if the correct move and valuation were found), the valuation of Qxh7 drops down to -0.38, indicating advantage for the black.

Oct-30-07		vibes43: I was thinking 25. Nxe8 Rxe8, 26. Qxh7+ Kf8, 27. Bxg6 to win the exchange.

Oct-30-07		willyfly: White is down two points in material (32 vs 34) but is closing in on the Black ♔. 25 ♗xg6 hxg6 26 ♕h7+ ♖xh7 27 ♘xe8+ ♔f8 28 ♘xc7 wins material but 25...h6 undoes that plan. Ah! I see it. Skip ♗xg6 and go directly to the ♕ sac. 25 ♕xh7+ ♖xh7 26 ♘xe8+ ♔f8 27 ♘xc7 Now it's 23 vs 20 - White has a net gain of one ♖ Let's look. ----- same moves - different order - arriving at the same position after 27 ♘xc7 - this game finishes in 80 moves with a good fundamental and instructive ♖♙♙ vs ♖ endgame

Oct-30-07		Confuse: Alas I missed the 40 + move continuation. : )

Oct-30-07		willyfly: <bakuazer>I think what <tacite> is saying is that simply saying, "I got it", doesn't add much to this forum. It's like what my teacher used to say in algebra class, "I want to see your work."

Oct-30-07		MostlyAverageJoe: <bakuazer: <tacite:If someone says « got all the moves! », he better get himself the story about a young boy named Pinocchio.> you don't have "to get all the moves". The puzzle is easy. One needs to notice (keep in mind) important d5 move (protects the night, after d6!) after which black's position is hopeless.> Indeed. So hopeless that it took another 65 moves to finish the game. And the d5 is only important in some lines (of which there are many more than a Tuesday puzzle normally has). BTW, thanks to tablebases, the following observations can be made about the resulting endgame: After 58.Kxd4, white should be able to mate in 38 moves with best play from both sides. After 65.Rf4+, white is now 40 moves away from the mate. After 72.Kf2, still 38 moves to mate. White made ZERO progress in 24 moves. Hopeless position, for sure :-) If black could resist as well as he did up to move 72 for some more time, who knows when and how this game would end.

Oct-30-07		vibes43: I was thinking 25. Nxe8+ Rxe8, 26. Qxh7+ Kf8, 27. Bxg6 to win the exchange - R,N,P for N. That's what I meant to say. Shouldn't that be enough to win the game? or what am I missing?

Oct-30-07		Pwned: At first I thought 26..Qc6 was good for black but now I see that white can play 27 Qg7+ Ke8 (if 27..Ke7 28 d5 Qe8 29 Qf6+ followed by de threatening Rd8 or if 28.. ed 29 Nd6 ) 28 f3 and black must lose another pawn because of the threat to the N on g6.

Oct-30-07		Pwned: Vibes43 - I think black just plays 26..Kxh7 in your line.

Oct-30-07		vibes43: <Pwned: Vibes43 - I think black just plays 26..Kxh7 in your line.> Oh yeah, thanks - forgot I moved my Knight.

Oct-30-07		dzechiel: White to move. White is down a piece. "Easy". White has apparently already sacrificed a piece to reach this position. We need to checkmate black or recover our material and more quickly. OK, I have a confession to make. I stared at this position for over five minutes, wondering what the heck was going on. Only after my son called me to help him with his C++ homework and I came back did I immediately see: 25 Qxh7+ Rxh7 26 Nxe8+ Kh6 27 Nxc7 Rh8 28 d5 allows us to rescue our desperado knight, leaving white up an exchange and two pawns.

Oct-30-07		MostlyAverageJoe: BTW, in case my earlier reply to <mkrk17> was unclear, I believe that his description ("black takes with either pawn") implied this line as one of the two possibilities. 25. Bxg6 hxg6? 26. Qh7+ Rxh7 27. Nxe8+ Kf8 28. Nxc7 Yes, the above is most likely winning (although not as good as in the game), except that 26...fxg6 spoils the plans: 25. Bxg6? fxg6! 26. Qxh7+ Rxh7 27. Nxe8+ Kf8 28. Nxc7 Rxc7 and now black is clearly better: click for larger view

Oct-30-07		An Englishman: Good Evening: I almost didn't get this one, after blowing the previous two Tuesdays! Why has this day been so rough for me lately?

Oct-30-07		al wazir: <MAJ: Consider 25. Qxh7+ Kf8 26. Nxe8 Kxe8 27. Qg7 Rf8 28. Bxg6>, and now 28...Qc6 instead of Qe7: click for larger view What does white do now?

Oct-30-07		Some call me Tim: <Mostly Average Joe> I agree with you that Kxe8 is better but is a win for White. I cannot comment on the computer-based ELO comments. In reply to repeated comments on the length of this game I would point that White's handling of this endgame is pathetic. He did so well with tactics in the middlegame but collapsed in the endgame as is so common. Even I can see his most glaring gaffes.

Oct-30-07		MostlyAverageJoe: <al wazir> 29.d5 prevents the mating threat you proposed.

Oct-30-07		MostlyAverageJoe: <Some call me Tim: <Mostly Average Joe> I agree with you that Kxe8 is better but is a win for White. I cannot comment on the computer-based ELO comments.> I am not actually sure whether Kxe8 is better. It was just a line I thought was likely to happen. I haven't done the full analysis yet (and am not sure if I have time to do so), but this puzzle is quite a bit more complex than a Tuesday should be. Yes, white wins in all variants, but there are just too many of them. Tuesdays are normally much more forced. The ELO stuff refers to the puzzle difficulty analysis that I run on my forum (currently with a week delay, but I run this puzzle just because its complexity annoyed me). See my user profile for explanation of the ELO (I really should've used some other measure - perhaps a logarithm of the number examined positions or some such). The weirdness with this puzzle is that the first move is found almost immediately, and is given high valuation. Then, with the progress of the analysis, the engine reduces the valuation VERY significantly; at certain depths, the white is thought to lose. Only after reaching 6-7 moves deep, the real strength of Qxh7 is confirmed. While at normal running speeds this behavior is not noticeable, at reduced speeds (which is how Hiarcs simulates lower ELO) this kind of behavior is noticeable and very uncommon. I recall maybe 2-3 puzzles like this, and only on Sat/Sun.

Oct-30-07		al wazir: <MAJ: 25. Qxh7+ Kf8 26. Nxe8 Kxe8 27. Qg7 Rf8 28. Bxg6 Qc6 29. d5> exd5. (I think 29. Bh5 is better; it threatens Bf3.) I still don't understand white's play in the actual game. He gave up a ♖ for a ♘ on move 34, so why not play 32. Rac1, winning a ♙ in return for the exchange? If 32...Bf3, then 33. Re1 Nxc1 34. Rxc1 Rg5 35. Nxa6. If 32...Nxc1 33. Rxc1 Rg4, then 33. f4.

Oct-30-07		KingG: If 19...gxf6, does White have anything better than perpetual after 20.Bxh7+ etc?

Oct-30-07		Honza Cervenka: <al wazir: <MAJ: 25. Qxh7+ Kf8 26. Nxe8 Kxe8 27. Qg7 Rf8 28. Bxg6 Qc6 29. d5> exd5. (I think 29. Bh5 is better; it threatens Bf3.)> 25. Qxh7+ Kf8 26. Nxe8 Kxe8 27. Qg7 Rf8 28. Bxg6 Qc6 29. d5! exd5 30. e6! fxg6 31. Re1 (diagram) with threats like 32. e7 or 32. Qxg6+ and black can resign. click for larger view

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