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Oldrich Duras vs Jan Kvicala
Brilliant-Game Contest of Czech Chess Club (1902), Prague AUH
Spanish Game: Berlin Defense. l'Hermet Variation (C67)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Aug-15-04
Premium Chessgames Member
  Gypsy: Kvicala, arguably the strongest pre-Duras player of Prague, was trying to improve on Duras vs P Dohnal, 1902 with his 10...d6. But that just let in Duras fireworks. Those who want to test themselves can use <11.? White wins> as puzzle.
Aug-15-04  patzer2: <Gypsy> Thanks for the tip on the game. I really enjoyed it. However, after 18...Qh7! I think Black can equalize and hold the position.

My analysis goes 18. Qh7! f7+ 19. Qxf7 Re7 20. Bd4! 21. Rxf7 Rxf7 22. Re1 Bf5 23. Qh4 (not 23. Qh5?? 24. Bxf2+ Kxf2 25. Bg6+ ) 23...Bg7 24. Bh6 Bxh6 25. Qxh6 Raf8 26. Qe3 Bxc2 =

Aug-15-04
Premium Chessgames Member
  suenteus po 147: <patzer2> I think there are some other possibilities to consider: If <18...Qh7> then I think 19. Re7 wins, since 19...Qh8 20. Qg6+, or 19...Rf7 20. Re8+!, or 19...Qxh6 20. Bxh6 Rd8 21. f7+!
Aug-15-04  clocked: 19.Re7?? Qxh6 Bxh6 Rxf6

The correct solution is
16.Bxf6+ Rxf6 17.exf6 Qf8 18.Qh5+ Kg8 19.Rae1 is crushing

Aug-15-04
Premium Chessgames Member
  suenteus po 147: Curses! I totally missed that the f-pawn becomes undefended when the queens are exchanged. Nice catch, <clocked>.
Aug-16-04  patzer2: <clocked> Thanks for rescuing this game after 11...Nxh7!! I caught the 18...Qh7! possibility, but completely missed 16. Bxf6+! as a winning shot.

I assume the key variations after 16.Bxf6+ Rxf6 17.exf6 are

(1) 17...Qf8 18. Qh5+ Kg8 19. Rae1 Bd7 20. Qg6+ Kh8 21. Re4

(2) 17...Qg8 18. Qh5+ Qh7 19. Qe8+
Qg8 20. f7

(3) 17...Qd7 18. Rae1

Aug-16-04
Premium Chessgames Member
  Gypsy: I am most impressed by your analysis, gentlemen (ladies and gentlemen).

<clocked> I was very curious about this, to me more obvious, <16.Bxf6!> line. The 1954 Duras book, from which I lifted this game, does not even pause by the game 16.exf6. I hope I am not missing something, but <16.Bxf6+ Rxf6 17.exf6 Qf8> and <18. Rae1> (skiping even the 18. Qh5+ Kg8 intermezzo) seems indeed a most resolute finish. I was actually more stuck on the line that <p2> gives as <(2) 17...Qg8 18. Qh5+ Qh7 19. Qe8+ Qg8 20. f7>. I found the line subtle; it is quite critical to check from h5, not h6! I went wrong several times.

<p2> This from the Duras book about the final position: "Black has no defense against the deadly 19.Re7; for instance 18...Rf7 19.Qg6+ Kh8 20.Re7 Rxe7 21.fxe7 etc., or 18...Qh7 19.f7+! Qxf7 20.Re7 etc. For this game, White won the prize for the best combination of the competition. A beautiful miniature."

As we see, <p2>, the book completely ignores the issue of your <20...Bd4! 21.Rxf7 Rxf7>. After that, there still is lots of play left in the game -- Black, probably on the account of loosing his queen, capitulated prematurely. That said, I do think that the position is a strategic win for White; Black piecess can protect their king only untill the White K-side infantry (pawns) arrive. Afterwards, White forcess will become overwhelming (IMKO).

After <22.Qg6+> Black can try three defenses. Here are thematic lines in each:

(I) 22...Rg7 23.Qe8+ Kh7 24.h4 ...

(II) 22...Kf8 23.Bh6+ Bg7 24.Bxg7 Rxg7 25.Qh6 ... (eq., 25...Nc5 26.f4 Bf5? 27.Qf6+ Rf7 28.Qh8+)

(III) 22...Bg7 23.Bh6 Bf5 24.Qg5 Bxc2 25.f4 Raf8 (tries but fails to stop the pawn) 26.f5 ...

This is far from an enumeration, of course, but I do believe that White has a win in each branch.

Aug-17-04  patzer2: <Gypsy> The position/problem (11. ?) is indeed a fascinating study in making a piece sacrifice to demolish pawn structure for a winning Kingside attack.

I think we can easily agree that <clocked>'s 16. Bxf6+! is definitely best play for a quick knockout win.

Looking at your analysis, after 18. Qh7! f7+ 19. Qxf7 Re7 20. Bd4! 21. Rxf7 Rxf7 <(III)22. Qg6+! Bg7 23.Bh6 Bf5 24.Qg5 Bxc2 25.f4!>, I think Black has good practical chances for a draw with 22...Re8!

No doubt your 22. Qg6+! in this line gives White winning chances (which my computer chess programs initially under estimated) in an extremely complicated position after 22...Re8!

However, for my own practical knowledge application from this game, I'm happy to take 16. Bxf6+! as my tactical lesson learned in how to win quickly after 11. Nxh7!!

Thanks again for the game and the analysis! I definitely learned something useful.

May-31-05  midknightblue: Brilliant game entry and someone resigned in a draw position? Phuey!
May-31-05
Premium Chessgames Member
  Gypsy: <midknightblue> There is no draw.
Jun-01-05  midknightblue: Excuse me, in an EQUAL position. The line is already posted above by Patzer2 (although he has the numbers of the moves off by 1/2 - it should read 18...Qh7 19. f7 Qxf7, etc.). If you have a win for white please post it. I haven't found any improvements for white yet. Patzer2's analysis looks correct to me.
Jun-01-05
Premium Chessgames Member
  WannaBe: Running Shredder 9 on deep analysis (I set the time to 10 hours) Calculating, please wait.

We know that chess players have resigned in a drawn position before. Hold your horses everyone.

Jun-01-05
Premium Chessgames Member
  Gypsy: <midknightblue> You are excused; maybe there is a draw after 18.Qh7! f7+ 19. Qxf7 Re7 20. Bd4! 21. Rxf7 Rxf7 22.Qg6+ Bg7 23.Bh6 Bf5 24.Qg5 Bxc2 25.f4 Re8 26.f5 ... but I do not see it. And my intuition is that those three pawns should win.
Jun-01-05
Premium Chessgames Member
  Gypsy: <WannaBe> Thx. The thematic question is of fairly general interest, I think.
Jun-01-05
Premium Chessgames Member
  WannaBe: Looks like black K+Q vs white K ending...
Jun-01-05  crafty: 18. ... ♕h7 19. f7+ ♕xf7 20. ♖e7 ♗d4 21. ♖xf7 ♖xf7 =   (eval 0.31; depth 15 ply; 2000M nodes)
Jun-01-05
Premium Chessgames Member
  WannaBe: Okay, here we go...
crafty already covered up to move 21

22. Qh5 Bd7 23. c3 Rh7 24. Qg6+ Bg7 25. Qc2 Nc5 26. Be3 Ne6 27. f4 Rf8 28. g3 c5 29. h4 Bh6 30. Re1 Rhf7 31. Bd2 Ng7 32. Kf2 Nf5 33. g4 Nxh4 34. Kg3 Rg7 35. Kxh4 Rxg4+ 36. Kh5 Rg7 37. Qe4 Rff7 38. Qa8+ Rf8 39. Qe4 Rf5+ 40. Qxf5 Bxf5 41. Kxh6 Rg2 42. Be3 Kf7 43. Rg1 Rxb2 44. Kg5 Bd7 45. f5 Rxa2 46. Rh1 Rg2+ 47. Kf4 Kf6 48. Rh6+ Kg7 49. Ke4 Rg4+ 50. Kd5 a5 51. f6+ Kg8 52. Rh2 Rg6 53. Rb2 Rxf6 54. Rb7 Re6 55. Rxc7 Rxe3 56. Rxd7 Rxc3 57. Ke6 Rd3 58. Ra7 c4 59. Rxa5 d5 60. Kf6 c3 61. Ra8+ Kh7 62. Ra7+ Kh6 63. Ra6 d4 64. Rc6 Re3 65. Rc8 Rf3+ 66. Ke5 d3 67. Rxc3 d2 68. Rxf3 d1=Q 69.Rf6+ Kg5 70. Rf5+ Kg4 71. Rf4+ Kg3 72. Rf7 Qd8 73. Ke6 Qe8+ 74. Re7 Qc6+ 75. Ke5 Qc5+ 76. Kf6 Kf4 77. Kf7 Kf5 78. Rd7 Qc8 79. Re7 Qc4+ 80. Kg7 Qh4 81. Kf7 Qh7+ 82. Kf8 Qh8+ 83. Kf7 Qd8 84. Re1 Qd5+ 85. Kf8 Qc5+ 86. Kf7 Qc4+ 87. Ke8 Qb5+ 88. Kf7 Qc4+ 89. Ke8 Kf6 90. Kd7 Qd5+ 91. Kc8 Qf5+ 92.Kb7 Qf3+ 93. Ka6 Qc6+ 94. Ka5 Qc3+ 95. Kb5 Qxe1 96. Kc4 Qd2 97. Kb3 Qd3+ 98. Ka2 Ke5 99. Kb2 Kd4 100. Kc1 Qe2 101. Kb1 Kc3 102. Kc1 Qc2#

Jun-01-05  midknightblue: OK, sorry. I am at work with no board and cannot visualize 8 moves in my head from a middlegame position like this(hopefully someday). I assumed somewhere along the way, there was computer analysis that said = at move 26. I just posted because I thought it looked like black had some fighting chances left after Qh7. I will have to give it a closer when I can play through it :) Wannabe, are you saying that Black has the win??
Jun-01-05
Premium Chessgames Member
  WannaBe: <midknightblue> yes. Or rather, Shredder says black has the win. :-)
Jun-01-05
Premium Chessgames Member
  Gypsy: <WannaBe> If you check earlier posts, <p2> and I have already bantered about the position some. His programs eventually agreed that 22.Qg6+ was the way White should play this.

<patzer2: ... Looking at your analysis, after 18. Qh7! f7+ 19. Qxf7 Re7 20. Bd4! 21. Rxf7 Rxf7 <(III)22. Qg6+! Bg7 23.Bh6 Bf5 24.Qg5 Bxc2 25.f4!>, I think Black has good practical chances for a draw with 22...Re8!

No doubt your 22. Qg6+! in this line gives White winning chances (which my computer chess programs initially under estimated) in an extremely complicated position after 22...Re8!> It should read 25...Re8, of course.

Jun-01-05
Premium Chessgames Member
  WannaBe: <Gypsy> Ah, yes, thanks. :-)
Jun-09-05  aw1988: Do you really need to analyze til mate?
Jun-09-05
Premium Chessgames Member
  WannaBe: <aw1988> no, it's just that I have it setup that way. I am sorry that upsets you. I will change my setting.
Jun-10-05  aw1988: It doesn't upset me at all, I was just wondering.
Jun-10-05
Premium Chessgames Member
  WannaBe: <aw1988> Sometimes people would ask what's the mating line, and so I figured what the heck, so I post it until mate, but I don't do the special graphics on those.

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