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Alexander Onischuk vs Igor Kurnosov
Aeroflot Open (2009), Moscow RUS, rd 2, Feb-18
Gruenfeld Defense: Exchange. Modern Exchange Variation (D85)  ·  0-1



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-10-13  morfishine: <chessantosh> 22...Nxe5 <23.Nxe5> is what I figured was best for White; but after <22...Nxe5 23.Nxe5 Rxd6 24.Rxd6 Qxe5 25.Qd1 Re8> Black, who was already 1-pawn ahead, now is 2-pawns up with an easy game

I didn't see that 23.Rxd8 Nxf3+ White declines the Knight; otherwise Black recovers the piece winning easily


Aug-10-13  chesssantosh: <morf> Indeed 23.Nxe5 is little better for white than the text line. Black is clear two pawns up but white can keep fighting.
Aug-10-13  Doniez: This final combo is great! Did White resign because of whatever move of his Queen, Black replies Ne2, threatening mate the next move with his Queen? Anyway, I didn't know this GM, and so I start searching info about him, and google sent me to this tragic link about the car accident. RIP GM Kurnosov, your great and notable games still live in our minds and hearts
Aug-10-13  rakmaninov: Kurnosov passed away yesterday
Premium Chessgames Member
  moronovich: A fine gesture from the CGstaff.
Aug-10-13  patzer2: Sad to hear of the tragic auto accident taking the life of Russian GM Igor Kurnosov at the young age of 28.

On Thursday August 8, 2013, according to, Kurnosov died after he and another pedestrian were struck by a car driven by a 20-year-old woman.

I missed Kurnosov's 22...Nxe5!! solution to today's Saturday puzzle, opting instead for 22...Nd4 when 23. Nxd4 cxd4 24. Qxd4! (not 24. Rxd4? Qxe5! ) 24...Rxd6 25. exd6+ Qf6 26. Qa4 Rd8 27. d7 a5 28. g3 leaves White winning chances and Black struggling to hold the draw.

Premium Chessgames Member
  OhioChessFan: 22..Nxe5 23. Rxd8 Nf3+ 24. gxf3 Rxd8 25. Qb3 Rxd1+ 26. Qxd1 b5 27. Qd2

click for larger view

This doesn't detract from the combination, but I think it's White's best. <25. Qb3> seems much better than Rxd8, a wide open board, Black has limited diagonal checks, White has Qb2 and Qd4 to check the Black King, in any case, Black has some serious work to do to avoid a perpetual.

Aug-10-13  morfishine: <OhioChessFan> I agree, 25.Qb3 improves on the text. In that case, I think 25...Rd4 improves for Black in your line:

(1) 25...Rd4 26.Rxd4 cxd4 27.Qa4 Qb1+
28.Kg2 Qb2 White has no time for 29.Qxa7 and Black Queen controls a1-h8 diagonal

(1a) 26.Re1 Rb4 27.Qc3+ Qf6 leaves Black firmly in control


Aug-10-13  kevin86: A great game by black,whose recent sudden death shocked the chess world.
Aug-10-13  cyclon: Today's Puzzle was difficult to ME in the sense of estimating the position objectively. It required a nap and pipeful. Still I'm not sure if I get it right at all. More I looked the position more I felt that it's a Black who's in trouble despite of being a pawn up unless he finds a way out and if possible, preferably for him. I come up with two lines of which first is the main variation;

1.) 22. -Nxe5 23. Rxd8 ( 23. Nxe5+ Rxd6 and Black is just two pawns up ) -23. -Rxd8 24. Rxd8 Nxf3+ 25. Kf1 ( on 25. Kh1 Black can try interesting 25. -Ne1 and 25. gxf3 Qg5+ followed by 26. Qxd8 Black has a theoretically winning Queen ending ) ; and here Black can try -25. -Nxh2+ or cut the Rook off by -25. -Nd4. In both cases there are game left with no certainties in sight. Difficult to evaluate, but at least Black seems to have solved his problems. Probably he's even better.

2.) 22. -b5 23. Qxb5 ( 23. Qb3 Nd4 is even better for Black ) -23. -Nd4 24. Qxc5 ( 24. Rxd8 Nxb5!?, or just 24. -Rxd8/ 24. Nxd4 Qxe5 and now 25. Ne6+ gets 25. -Qxe6 and 25. Nc6 Rxd6 ) -25. -Rxd6 26. Qxd6 Nxf3+ 27. gxf3 Qxf3 and this seems pretty equal.

Definitely I'd play the first line, BUT I'm not sure of anything in this Puzzle.

Aug-10-13  cyclon: A very good Puzzle indeed! Kurnosov's death was a tragedy. Sometimes too much depends from too little in life.
Aug-10-13  Ratt Boy: Google Translate is clearly doing poor chrisowen a disservice.
Aug-10-13  dulam.sudheer: If white accepts the knight, whats wrong with
22..Nxe5 23. Rxd8 Nf3+ 24. gxf3 Qg5+ 25. Qg4

white will have better chances of winning

Aug-10-13  BOSTER: "Mistakes are always waiting for you to come".

How to get to the pos.<POTD>.

First white sacr. the pawn c3 without any ideas, then lost the tempo playing Rd5-Rd6, and finally to give the game emotional charge played Qa4? This is the pos. after black, who had extra pawn, played 21...Qf5.

click for larger view

Certainly , white should remember the first order- the safety of the king, and of course he had to see with that quiet move Qf5 the black queen with curiosity looking at b1 square. And inspite of move like h3 to make the luft, he played 22.Qa4? Once Furman, who was able to look deeply into the games (who worked with A.Karpov), noticed about Bronstein's games "You put your pieces in such a way that the opponent can never attack them in one move".

White should pay attention that black can attack the queen playing b5, and if Qb3-c4. To think that black specially lured the white queen to attack knight on c6,who defended the rook d8 maybe nonsense. Maybe white was in hurry to make the material equal.

Premium Chessgames Member
  Jimfromprovidence: <whatthefat> <B1> <26.h3? Qb1+ 27.Kh2 b5! as in the game, and now 28.Qa6/28.Qxa7 allows Black to cast a mating net with 28...Ne2, when White is powerless to stop the following sequence: 29.h4 Qg1+ 30.Kh3 Qh1+ 31.Kg4 Qxg2#>

Here is the position after 27...b5.

click for larger view

Not only does 27...b5 force white off of the a4-d1 diagonal as <whatthefat> superbly describes but it also prevents the saving move Qe8! For that I say 27...b5!!

Aug-10-13  Sacsacmate: Sad to know about Kurnosov. RIP
Aug-10-13  SuperPatzer77: Igor Kurnosov will be very sorely missed. RIP. Some jerk's car hit and killed Igor Kurnosov.

Beautiful game by this fallen player!!


Aug-10-13  SuperPatzer77: < dulam.sudheer: If white accepts the knight, whats wrong with 22..Nxe5 23. Rxd8 Nf3+ 24. gxf3 Qg5+ 25. Qg4
white will have better chances of winning >

<dulam.sudheer> 22...Nxe5!!, 23. Rxd8 Nf3+, 24. gxf3 Rxd8! (better than 24...Qg5+), 25. Rxd8 Qg5+, 26. Qg4 Qxd8 (Black recovers the rook and Black is two pawns up.


Aug-10-13  cyclon: <Jimfromprovidence:> To 25. -Nd4 White COULD have played 26. Qd1 preventing the game-line 26. h3? Qb1+ 27. Kh2 b5 and wherever the Queen moves Black plays 28. -Ne2 threatening mate by 29. -Qg1X. I also had this position in my analysis, but rejected it because of 26. Qd1 preventing rapid mate though maybe not saves the game. Don't know that for sure, haven't analyzed it that far, but Black stands better.
Premium Chessgames Member
  Jimfromprovidence: <cyclon> <To 25. -Nd4 White COULD have played 26. Qd1 preventing the game-line 26. h3? Qb1+ 27. Kh2 b5 and wherever the Queen moves Black plays 28. -Ne2 threatening mate by 29. -Qg1X.>

I simply did not analyze this part because <whatthefat> had already done such a good job of it so I just piggybacked on his analysis.

What I was trying to get at in my earlier post is that after 27...b5 black takes away the tempo white needed to get to the back rank. Here is the position again.

click for larger view

White needs to get to a8 or e8 in one move to stop ...Ne3 but those two pawns stop him.

Aug-10-13  patcheck: I don't understand. I had analysed: 22. ... Nxe5 23. Rxd8 Nxf3+ 24. Kh1 Rxd8 25. Rxd8 Nd4. But then I thought 26. Qd1 doesn't give black an absolutely clear advantage.

Of course, black can follow with 26. ... Qxf2 and will have three pawns for the quality. But is it enough to win ?

Thanks if someone can answer this.

Aug-10-13  patcheck: ok. I see that <agb2002> had answered somehow this question.
Aug-10-13  Abdel Irada: <Ratt Boy: Google Translate is clearly doing poor chrisowen a disservice.>

If I ever l'ed ol, I would do so now. :-D

Aug-11-13  sfm: If White plays 26.Rxd4 instead of 26.h3?? the nice extra pawn may decide but there is still a fight left.
Aug-11-13  Karpova: <sfm> after 26.Rxd4 cxd4 27.Qxd4+ Qf6 28.Qd1 Qxf2 Black is again 2 pawns ahead with the better position.
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