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Kivanc Haznedaroglu vs Jamshed Isaev
Chess Olympiad (2010), Khanty-Mansiysk RUS, rd 7, Sep-28
Spanish Game: Exchange Variation. Alapin Gambit (C69)  ·  0-1



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Apr-08-11  newton296: the beauty of black's Rd4 is that white's only defense to the threat of Qh1 mate is to take Qxd4 (not c3xd4 or Qh1++ ) but now white can play Qxd4 creating 2 mates in one move!! (Qf2++ and Rh1++) I saw that white had Re8+ or Ne4 to stop the mate threats but can't play both in one move. at least white gets to choose how he is mated!! ouch!! lol !

got this one fast, but its such a pretty shot it was a pleasure to work out the moves,

Premium Chessgames Member
  kevin86: I was on the right track,but took the wrong train. I went for decoy (♖d5) when interference (♖d4) was called for.

20...♖d4 21 ♕xd4 ♕xd4 22 ♖e8+! ♔a7!!. Black threatens two mates on the move-there is no defense.

Apr-08-11  goodevans: At first I thought this was easy-peasy but I didn't consider the immediate <21 Re8+>.

I don't think I can claim to have solved it having failed to consider that defence.

Apr-08-11  ChessPieceFace: <Patriot> I went for 20...Rd5 too, with the same aim as you. As you say, white could always play 21.Qg1, but then what? 21...Qh1 22.Qxh1 Rxh1#, right?
Premium Chessgames Member
  patzer2: For today's Friday puzzle solution, the neat obstruction or interference move 20...Rd4!! gives Black a mating attack.

The Black attack begins with the sacrifice of a piece after 12...exd4!?

As an improvement, White should have played 17. f3!, which appears to hold and give him difficult winning chances.

Later on, 19. Qc5! might have saved the draw for White.

Here's some analysis move-by-move with Fritz:

<12...exd4!?> This true sacrifice gives up a piece for a strong attack with lots of difficulties for both sides. It may not be sound, but over the board it was too much for White in this game.

<13. e5 Bxe5 14. hxg4 hxg4 15. Nxe5 Nxe5 16. Qxe5 Qh4 17. Kf1?!>

According to Fritz, White can do better and is actually winning after 17. f3! Rh5 18. Qe4 Qh2+ 19. Kf2 g3+ 20. Ke2 Qxg2+ 21. Kd3 dxc3+ 22. Kxc3 Rc5+ 23. Kb3 Rb5+ 24. Kc4 Rbd5 25. Nb3 Rd3 26. Re2 Qxf3 27. Qxf3 Rxf3 28. Be3 g2 29. Rg1 Re8 30. Kd4 c5+ 31. Nxc5 f5 32. Rgxg2 b6 33. Nxa6 c5+ 34. Kd5! Rfxe3 35. Rxe3 Rxe3 36. Rxg7 .

However, the line is extremely complicated, and one I doubt most OTB players would dare to attempt.

<17... d3 18. f3 g3 19. Qf5+?>

It would appear 19. Qc5! might just save the day for White. After 19. Qc5! play might continue 19...Rh5 (Not 19... Rd4? 20. Qf5+ Kb8 21. Qh3 ) 20. Qg1 Rdh8 21. Ne4 f5 22. Ng5 Qh2 23. Be3 f4 24. Nh3 fxe3 25. Rxe3 Rxh3 26. gxh3 Qxh3+ 27. Ke1 Qh2 28. Qxh2 gxh2 29. Kd2 h1=Q 30. Rxh1 Rxh1 31. Kxd3 g5 32. Re8+ Kd7 33. Rg8 Rd1+ 34. Ke4 Rd2 35. Rg7+ Kd6 36. b4 Re2+ 37. Kd4 Rxa2 38. Rxg5 =.

<19... Kb8 20. Qc5 Rd4!!> This is the obstruction which creates decisive mate threats.

The tempting alternative 20...Qd4?? fails to 21. Qxd4 Rxd4 22. Re8+! Rxe8 24. cxd4 when White is up a piece and has turned the tables with an easy win.

<21. Qxd4>

No better is 21. Re8+ Rxe8 22. Qxd4 Qh1+ 23. Qg1 Re1+ 24. Kxe1 Qxg1+ 25. Nf1 Qf2+ 26. Kd1 Qe2#.

< 21... Qxd4 22. Re8+ Ka7> 0-1

White resigns in lieu of the dual mate threat 23. Rxh8 Qf2# and 23. cxd4 Rh1#.

Premium Chessgames Member
  patzer2: One can argue that the true sacrifice begins with 13...Bxe5!? since 12....exd4!? 13. hxg4? Nf4! is winning for Black.

The alternative 13...Nxe5 or 13...Bxf3 slightly favors White. So it's clear to me that with 12...exd4!?, instead of say 12...Nf4 =, Black was going in for the piece sacrifice when he played 12...exd4!?

Apr-08-11  BOSTER: <LMAJ> <I wonder if this is all sound?>. Inspite of very easy solution beginning with 20...Rd4 the position on diagram looks attractive. This is a victory of the piece coordination under the material.The trap which black created for white king looks so astonishing that it is not easy to stop looking at it. The question is only one. Can be such bold game playing by black refuted after 19. Qe3? This is the position with white to play

click for larger view

Apr-08-11  YouRang: A beautiful puzzle, but unfortunately I didn't see the simple winning reply to 22.Re8, namely <22...Ka7!>.

For some reason I kept thinking I had to capture the rook with 22...Rxe8, which still leaves black better, but not nearly as nice & quick as the game.

Apr-08-11  VincentL: "Difficult".

If the white queen can be deflected away from the a7 - g1 diagonal, mate can be effected with Qa1+

The obvious try is 20....Rd5.

(a) If 21. Qg1 black continues 21.....Qh1. Then 22. Qxh1 Qxh1 mate. Or 22. Re3 Qgxg1+ 23. Kxg1 Rdh5 and white cannot prevent 24....Rh1 mate.

(b) If 21. Qe3 Qh1+ (not Re5 22. Ne4 !) 22. Qg1 Qxg1+ Rdh5 and again black finishes with 23....Rh1 mate

This seems too easy for a Friday, so there must be a defence I have missed.

But I am in the office and have no more time.

Letīs check to see what happened.

Apr-08-11  Patriot: <<ChessPieceFace>: <Patriot> I went for 20...Rd5 too, with the same aim as you. As you say, white could always play 21.Qg1, but then what? 21...Qh1 22.Qxh1 Rxh1#, right?>

Yes if white played 22.Qxh1 that would be a major mistake. So perhaps 22.Ne4 to try and "uncoil". There could be a way to win but 20...Rd4 offered immediate results, so that's why I dismissed 20...Rd5 quickly. There's no sense in calculating that out when there's a much more promising candidate to consider.

Apr-08-11  stst: 20... Rd4 to counter-block the intended block by WQ at g1 (on 20...Qh1+) W can resign now, for no defense to Qh1#
But if W struggles to continue:
21.QxR or PxR, QxQ or Qh1# (if PxR)
22. any, Rh1#
Apr-08-11  scormus: ... Ka7, another quiet move leading to immediate resignation. Is that the theme of the week. Maybe Sunday's winning move will be W playing a3 or Bh1 ;)
Premium Chessgames Member
  doubledrooks: <Eduardo Leon>: in your main line after 25. Nf1 Rxf1+ isn't mate, white has 26.Re1 and now ...Rxe1#.
Apr-08-11  David2009: K Haznedaroglu vs J Isaev, 2010 postscript: Here's the puzzle position colours reversed

click for larger view

K Haznedaroglu vs J Isaev, 2010 20...? colours reversed with a corresponding link to Crafty End Game Trainer: After the game line 20...Rd4 (corresponding to 1.Rd5 in the colours-reversed position) Crafty EGT is mated in 7 moves.

After the inferior 20...Rd5 (corresponding to 1.Rd4 in the colours-reversed position) Crafty EGT vs Crafty EGT ends in a draw (using the link in my previous post K Haznedaroglu vs J Isaev, 2010). The moves are 20...Rd5 21.Qg1 Rdh5 22.Ne4 f5 23.Ng5 Qc4 24.Bd2 Rh1 25.Re8+ Rxe8 26.Qxh1 Re2 27.Qh8+ Ka7 28.Qxg7 Rxd2 29.Qd4+ Qxd4 30.cxd4 Rf2+ 31.Kg1 Rxb2 32.Ne6 Rc2 33.Kf1 Rf2+ 34.Kg1 Rc2 35.Kf1 Rf2+ draw by repetition.

Apr-08-11  cyclon: 20.-Rd4 21.Qxd4 Qxd4 22.Re8+ Ka7 cufflinks.
Apr-08-11  Julian713: 20...Rd4 21.Qxd4 Qxd4 and White has no way left to either block the rook or let the king escape the back rank mate.

Wow, I almost never get a Friday puzzle, at least not that quickly. Hopefully I'm right.

Apr-08-11  Julian713: I guess I missed 22.Re8+ Ka7 but I would HOPE that I'd see Qf2# if i was playing over the board :D
Premium Chessgames Member
  morfishine: Took me awhile to get the correct move order. 20...Rd4! does the trick. 21.Qxd4 Qxd4 22.Re8+ Ka7! (if 22...Rxe8? black can survive with 23.cxd4) and black can resign.

Interpolating 21.Re8+ doesn't help since 21...Rxe8 22.Qxd4 Qh1+ 23.Qg1 Re1+ ends it.

I can't take credit as I glanced at it this morning for a few minutes running late to work without figuring it out, so I had all day to think about it. Great value in this puzzle!

Apr-08-11  WhiteRook48: oh, I failed this one, i went for 20...Rhe8?!
Premium Chessgames Member
  Jimfromprovidence: <patzer2> <It would appear 19. Qc5! might just save the day for White. After 19. Qc5! play might continue 19...Rh5 (Not 19... Rd4? 20. Qf5+ Kb8 21. Qh3 )>

This thread is worth some analysis.

Basically, 19 Qc5 Rd4 20 Qf5+ Kb8 wins for white.

click for larger view

If, however, white reverses those two moves as in the text with 19 Qf5+ Kb8 20 Qc5 Rd4, he loses.

click for larger view

Apr-08-11  TomOhio: Holy crap, I actually got a Friday puzzle.
Premium Chessgames Member
  Gilmoy: This puzzle irritated me by sparking a fruitless 2-hour search through my notes spreadsheet.

I instantly "recognized" this position -- it was a gnarly chessgames puzzle or GotD with an untouchable <..Rd5 sac> to cut the Qc5 from h5. But then it dawns on me that -- this <isn't> the game I was thinking about.

So I was <already> looking for an Rdx line-blocking sac, and <20..Rd4> took only half a second more. And it worked.

Then I noticed this game's date: 2010. Way too recent; the one I remember was early in my chessgames membership, possibly pre-2007.

Then I searched my notes for that previous game, and failed. So I appeal to my fellow readers:

- GotD or PotD from a few years ago
- English(?), 0-1
- Black passive-sacked material (a piece and/or couple of pawns) for Qg5(?), f3, and half-open g - White had c4, Qc5, and a thin defense based on doubling somewhere on g to block a Rook (maybe an Ng5)

- Black's killer move was ..Rd5!! untouchable: White couldn't play cxd5

- IIRC, it ended with a short K-hunt, including the R after Rh5

- White was female, Black was male (?)

- Apparently, neither Gilmoy nor patzer2 kibitzed on it

Is there a way to search chessgames for elements of a position? Hmph ...

Premium Chessgames Member
  Phony Benoni: <Gilmoy> I don't know of a way to search elements of a position here. As a premium member, you have access to a zipfile directory of the database that can be downloaded to your own search engine. Go to the Premium Membership page. Some of our resident geeks can probably advise you of the most efficient way to do that.

If helps, I've been compiling collections of GOTDs and POTDS. If you go to Game Collection: Game of the Day 2010 and Game Collection: Puzzle of the Day 2011, you'll find links to the other collections. The POTD is only complete from 2006-August 2010.

Apr-08-11  cadwallon: <Patriot: <<ChessPieceFace>: <Patriot> I went for 20...Rd5 too, with the same aim as you. As you say, white could always play 21.Qg1, but then what? 21...Qh1 22.Qxh1 Rxh1#, right?> Yes if white played 22.Qxh1 that would be a major mistake. So perhaps 22.Ne4 to try and "uncoil". > It's worse than that. 20...♖d5 21 ♕g1 ♕h1 22 ♖e8+ ♖xe8 (forced) 23 ♕xh1 and white is winning easily
Apr-11-11  ChessPieceFace: <Patriot> <cadwallon> This is my biggest problem: when trying to analyze lines and continuations, I only see the moves that *I* would play, which usually are, as you say, "major mistakes". Need to work on that...
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