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Evgueni Chevelevitch vs Gerd Putzbach
10th IHEM (2007), Hamburg GER, rd 2
Sicilian Defense: Scheveningen. Classical Variation (B84)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Oct-15-10  jussu: It is not every time I get a Friday puzzle but this one proved rather easy. 32. Qg8+ is, of course, the first thing to look at but 32...Qxg8 33. Rxg8+ Kxg8 34. f7+ simply loses a pawn. So the next thing to try is naturally 32. Bd4, leaving black struggling to find anything to counter this same sequence.
Oct-15-10  David2009: E Chevelevitch vs G Putzbach, 2007 White 32?

32 Bd4 is natural, strong and quasi-forced (White has no reasonable alternative) so let's play it and think in Black's time. I will set the position up on Crafty End Game Triner as soon as I check:
+ + + +
No surprises for the first move. Crafty EGT check of the puzzle position:


click for larger view

(E Chevelevitch vs G Putzbach 2007 32?)
http://www.chessvideos.tv/endgame-t...

After 32 Bd4 h6 I settle down for a long think (I haven't seen the game continuation. I appear to have two choices: (a) exchange Queens and sacrifice the exchange starting Qg7+. Black tucks his K away on the White squares. On reflection I don't think this will work; (b) play Qf5 threatening Rg7. I'll try it.
33 Qf5 Bd7 (ouch!) 34 Rg7 Bxf5 Now what? 35 Rxf5 Bxg7 is no good so 35 Rxf7 which is not much better - Crafty EGT eventually won. Time to admit defeat and look at the game line to find the solution. ====
The game continued 32.Bd4 h6 33.Qf4 Re5 34.exd5 Bxd5 35.Bxe5 dxe5 36.Qxe5 Bc4 37.Rf2 Re8 Crafty varies with 36...Be6 and I have no time to pursue this - we have guests. Over to other kibitzers.

This has been a first-class Friday puzzzle which I have comprehensively failed to solve.

Oct-15-10  zb2cr: Missed this one. I couldn't see the proper follow-up to 32. Bd4 after 32. ... h6. 33. Qg8+ didn't get anywhere, and I didn't see 33. Qf4.
Oct-15-10  dakgootje: Seemed very hard for a friday with all those complications and variations.

My spidey senses tell me that I am not going to stand a chance this weekend.

Oct-15-10  Marmot PFL: 32 Bd4 looks lethal, threatening Qg8+ Qxg8 Rxg8+ Kxg8 f7#. Black can defend with Re5, but it costs the exchange. He does keep the bishop pair, so its not the easiest ending for white.
Oct-15-10  Marmot PFL: Didn't account for h6, clearing h7 for the king. No surprise that this fails though, with the broken king position, and the threat of Rg7 dooms black anyway.
Oct-15-10  Patriot: I looked at quite a few candidates: 32.Qg8+, 32.Qg7+, 32.exd4, 32.Nxd4, 32.Rf2, 32.Rf4, 32.Kg1, 32.Kh2; but settled on 32.Bd4. Then I saw the possibility of 32...h6. 32.Bd4 was more of a threat to play 33.Qg8+ next. 32.Bd4 is a nice way to put the squeeze on black which positions like this usually call for, but one must at least look at some way to crash thru first and then look for moves that simply tighten the screws. But maybe that depends more on how many defenses exist. The fewer defenses, the more you can just take your time to improve your position.

Perhaps my thought process would have been more efficient if I took just a moment to make a "pass move" for white. In that case, 32...Re5 would have been annoying so 32.Bd4 would move toward the top of my candidate move list much faster.

Oct-15-10  LIFE Master AJ: Checking, I found that 32.Bd4 is indeed the move. If 32...h6; 33.Qd2! Now if 32...Re5; BxR and cxd5 winning - although it is far from easy.
Oct-15-10  LIFE Master AJ: In the game, White chose Qf4 over Qd2. (Which also looks good and lead to a nice decision.)
Oct-15-10  gtgloner: Black resigned on move 42. As I see it, he had only 2 avenues:

42. ... Qxg8 43. Rxg8+ Kxg8 44. Qxe4 and be in a Q vs. B endgame or:

42. ... Kh7 43. Qc7+ Re7 44. Qxe7 Bxe7 45. R2g7#

Anyone see anything I missed?

Oct-15-10  JG27Pyth: Bd4 I feel good about... the rest ehhh not so much. I kept trying to force some kind of Qg7 or Qg8 sacky-matey thing. And so's now I sighs, and I Putzbach the pieces in da box.
Oct-15-10
Premium Chessgames Member
  kevin86: The quiet move of Bd4 is the key-it's like setting a bobm for later. The long diagonal is to be black's Waterloo.
Oct-15-10
Premium Chessgames Member
  patzer2: For today's Friday puzzle, finding the first move 32. Bd4! in this assault on the weak Black King position is fairly easy, since the alternative 32. Qg8+ Qxg8 33. Rxg8+ Kxg8 34. f7+ Kh8! 35. fxe8 Rxe8 36. exd5 Bb7 to is clearly in Black's favor.

The hard part is finding the followup moves.

Considering the complexity of the position, White did a fine job in the followup, but he passed over one stunning possibility.

Instead of the expected 35. Bxe5 to , which is probably good enough to win with difficulty, even stronger appears to be the surprising 35. Nxd5! when play might continue 35...h4 36. Bxe5 dxe5 37. Qxh4 Qxd5 38. f7 Qd4+ 39. Qxd4 exd4 40. Rg8+ Kh7 41. Kf2 .

Black might have put up more resistance with 36...Bb7 or 39...Re6 , but defending an exchange down would have been an extremely difficult task.

In the final position, the threat of mate-in-three after 42...Kh7 43. R2g7+ Bxg7 44. Kh8 Qxh6# forces decisive loss of material.

Oct-15-10
Premium Chessgames Member
  Jimfromprovidence: Following up on the thread of <patzer2>, after 35 Nxd5 black has two other not so good choices.

First is 35...Qxd5, after which 36 f7, below, is a mate threat (seeing 37 Qf6+).


click for larger view

Or if 35...Rxd5, then 36 Rg7, below threatens 37 Qxh6#).


click for larger view

Oct-15-10  scormus: <gofer> nice find! I agree a bit tough for a Fiday.

I saw it all the way to Ra7 and saw the B LSB was defended. Dismissed it without looking closely enough to see the B forces are paralysed on r8. B can try to break out with 39 ... Bxd5 40 Nxd5 Re1+ 41 Kf2 Rd1 but afer 42 Ke3 W still has winning edge

Oct-15-10
Premium Chessgames Member
  Phony Benoni: <gtgloner: Black resigned on move 42. As I see it, he had only 2 avenues:

42. ... Qxg8 43. Rxg8+ Kxg8 44. Qxe4 and be in a Q vs. B endgame or:

42. ... Kh7 43. Qc7+ Re7 44. Qxe7+ Bxe7 45. R2g7#

Anyone see anything I missed?>


click for larger view

Both lines look fine. In the second line, I would have played <42...Kh7 43.R2g7+ Bxg7 44.Rxg7+ Kh8 45.Qxh6#>, but that's a matter of seeing it first. Your idea is prettier, though technically Black can hold out a move longer by interposing his queen on d7.

Oct-15-10
Premium Chessgames Member
  chessgames.com: In retrospect we could have run this one on a Sunday. We'll make it up to you--tomorrow's puzzle will be a pleasant stroll compared to this.
Oct-15-10  wals: Black
(+1.71):31...exd5. Now leaves the d5 pawn protected twice and attacked three times.

Analysis by Rybka 4 x64: depth 20 : 5 min :
31...Bd7 gives added protection to the
e6 pawn.
1. = (0.19): 31...Bd7 32.dxe6 Bxe6 33.Bd4 Bg4 34.Qe3 Rc4 35.Nd5 Bh6 36.Qd3 Bg5 37.Ne7 Rc1 38.Rxc1[] Bxc1 39.Qc2 Bf4 40.Rc3 Be5 41.Bxe5 dxe5 42.Rc6 Be6 43.Qf2 Rf8 44.Rxa6 Qxf6 45.Qxf6+ Rxf6 46.Rb6 Kg7

2. (0.46): 31...h6 32.dxe6 Rxe6 33.Qf4 Re5 34.Bd4

Black depth 18 : 5 min :
(+4.10):34...Bxd5.
Better,
1. (1.94): 34...Bd7 35.Bxe5 dxe5 36.Qxe5 h4 37.Re3 h3

2. (2.11): 34...Be8 35.Bxe5 dxe5 36.Qxe5 Bd7 37.Rf4 Re8 38.Qd4 Rc8 39.Ne4 Rc1+ 40.Kg2 Rc2+ 41.Kh1 Rc4 42.Qd3 Bg4 43.d6 Qd7 44.Kg2 Qc6 45.f7 Rc2+ 46.Kg1 Rc1+ 47.Rf1

White blunder, depth 18 : 2 min :
(+1.06):35.Bxe5.
Best,
1. (4.10): 35.Nxd5 h4 36.Bxe5[] dxe5 37.Qxh4[] Qxd5 38.f7 Qd4+[] 39.Qxd4[] exd4 40.Rf6[] Kh7

Black blunder depth 14 : 2 min :
(+7.04):39...Bd5.
better,
1. (1.09): 39...Re6 40.Kh1 Rc6 41.Re3 Qd7 42.Kg2 Bf7 43.Ne4 Bd5 44.Kg3 Rc1 45.Rh2 Qf7 46.Kh4 Be6 47.Rg3 Rd1 48.Nc5

2. (1.33): 39...h4 40.Qxh4 Ra1 41.Rd2 Rf1 42.Ne4 Bd5 43.Nf2 Qa7 44.Kh3 Qf7 45.Rgd3 Be6+ 46.Kg2 Re1 47.Rd8 Qg8+ 48.Kf3 Rg1 49.Rd1 Rg6 50.Ke2 Bc4+ 51.Kd2

There was no way Black could recover and resigned move 42.

Oct-15-10  njchess: I found Bd4 only after concluding that nothing else seemed to work. Another tough puzzle.
Oct-15-10  howlwolf: I saw all the way to Qf4 but feel like Re5 is not forced, what happens if dxe4? That is where I couldn't figure it from. Just spent a couple of minutes though.I am going to bed will look tommorow to see if anyone answered my question or if it is in the above analysis.
Oct-15-10  CHESSTTCAMPS: White is down 2 pawns, but black's extras are all weak pawns that hamper the mobility of his pieces. White's one bishop has more legal moves available than both of black's bishops combined, and the white other pieces are all more active than their black counterparts. The black queen is confined to the lowly task of blockading a pawn, while black's king is trapped in the corner. A knockout looks imminent. For a couple minutes, I looked at 32.Qg7+ and that didn't work, so I switched attention to the natural move:

32.Bd4 prepares a discovered check against the king and threatens a forced mate in 3.

A) 32... de? (and others) 33.Qg8+! Qxg8 34.Rxg8+ Kxg8 35.f7#

B) 32...Rc7 33.exd5 Bb7(or a8) (Bd7 34.Qg8+! etc) 34.Qg8+! (anyway) Qxg8 35.f7+ Q(B)xg7 36.Bxg7+ B(Q)xg7 37.fxe8=Q+ forces mate.

B.1) 33... h6 34.Qf4 Bb7(a8) 35.Rg7! Bxg7 36.fxg7+ Kg8 37.Qxh6 wins

C) 32... h6 33.Qf4 Re5! 34.exd5 Bxd5 (Rxd5 35.Nxd5 Qxd5 36.f7+ Kh7 37.Qf5+ trades queens with material advantage) 35.Bxe5 dxe5 36.Qxe5 and the exchange advantage should win, but black has freed his position somewhat.

C.1) 33... dxe4? (and others) 34.Rg7 Bxg7 35.fxg7+ wins.

When I looked at the position in the morning, in line C I had intended (instead of Qf4) 33.Qg8+ Qxg8 34.Rxg8+ Kxg8 35.f7+ Kh7 36.fxe8=Q Rxe8 37.exd5 Ba8 38.Rf7+ Kg6 39.Ra7 with an endgame bind (even though 2 pawns down), but when I started writing it up, the idea of playing for Rg7 looked more clear cut.

Time to see how this played out and also to see if I can win this position against Crafty.

Oct-16-10  EXIDE: I selected Bd4, more to apply pressure along the diagonal, than any winning combination. No way could I figure out the detailed winning moves. Still, happy to see it as the right move.
Oct-16-10  CHESSTTCAMPS: Well, I found the first few moves of the game line in C, but I didn't have much of a clue after that, as my play against Crafty demonstrated. Definitely a very challenging Friday. My alternate C line may be viable for white, but further study is needed. I see now that <Gofer> found a similar line and claimed a win for white, but 38...Kg6! is a significant improvement that may turn the tables.
Oct-16-10  M.Hassan: "Difficult"- White to play 32.?
Black has a Bishop for a Knight + 2 pawns.

32.exd5 Bb7
33.Bd4 Rc4
34.Qg8+ Qxg8
35.f7+ Rxd4
36.fxe8=Q Rg4
37.Qxf8#
Black may try to defend with Queen at move 33 and this can prolong the game 32.exd5 Bb7
33.Bd4 Qg6
34.f7+ Bg7
35.Bxg7+ Kxg7 <if 35...Qxg7,36.Qxg7#> 36.Qf4 Rf1
37.Rxg6 hxg6
38.Qf6+ Kh7
39.Ne4 Bxd5
40.Ng5+ Kh6
41.Ne6 Bxe6
42.Qxe6
This position is in favour of White due to material superiority and I beleive White wins because of this. Too late now and I can't go through it. Time to check
-------------
Entirely different line!!!!

Oct-16-10  David2009: <M.Hassan: "Difficult"- White to play 32.? Black has a Bishop for a Knight + 2 pawns. 32.exd5 Bb7 33.Bd4 Rc4> This is only the latest in some very worth while kibitzes coming after my original post (E Chevelevitch vs G Putzbach, 2007). I now have the time to study the position and see how much I had missed first time round. <M.Hassan>: in your line Crafty End Game Trainer defends with 32...Bg4 braking the tactics. Link repeated for convenience: http://www.chessvideos.tv/endgame-t...

Against Crafty EGT, <patzer2>'s splendid 35 Nd5! seems to be the most clear-cut win.


click for larger view

(Black to play; reached by the moves 32.Bd4 h6 33.Qf4 Re5 34.exd5 Bxd5 35.Nxd5). The EGT defends with Qxd5 and after 36.f7 (as suggested by <Jim>) continues 36...Kh7 37.Bxe5 Qxe5 38.Qxe5 dxe5 39.Rf6 Rc4 40.Rxa6 Rf4 41.Rb6 h4 42.Re3 Rxf7 43.Rxb5 Bg7 44.Kg2 with an easy win.

The positions are most interesting and there are a number of plausible wrong paths for White.

<M.Hassan>: have you considered activating your profile?

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