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Petr Kiriakov vs Konstantin Aseev
Russian Championships (2002), Krasnodar RUS, rd 8, Sep-03
Nimzo-Indian Defense: Classical Variation (E32)  ·  1-0


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sac: 25.Nxc7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Feb-25-05  Hundridian: It seems like questionable compensation, 3 pawns and a queen for a rook, bishop, and knight, but clearly the resulting position Kiriakov gains makes it an obvious advantage.

I saw the Nxc7, although I didn't see the ...bh7+ if Qf7. Very nice play by Mr. Kiriakov.

Feb-25-05  Eric Xanthus: Unlike yesterday, I saw the idea behind this one well enough. That position after 24..a6 is lousy with tactics. e6 and h7 squares are just begging to be abused by white.

Materially Q+3p may not be superior to RBN, but here black's entire position is falling apart--it will soon be Q+4p, then 5, etc. Nothing protecting anything else, all the pawns waiting to be snapped up--it's like a Lasker position.

Feb-25-05  maxundmoritz: After 26...Qf7, 27.Qxh6 Qg7 28.Qe6+ Bf7 29.Qxd6 is almost forced and looks like an interesting alternative.
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  cu8sfan: Must be getting towards the end of the week...
Premium Chessgames Member
  An Englishman: Good Evening: Yes, and the final position is a good example of domination--no matter where the Knight goes, the Queen will fork it and the King on the next move.
Feb-25-05  maxundmoritz: <Gypsy> Not 29.Bh7+?, but 29.Qxd6 keeps Bh7+ as an option and threatens to take the Knight.
Feb-25-05  minimaxing: The variation I calculated differs slightly from the actual game. According to Chessmaster, it's an improvement.

24. Nxc7 Qxc7
25. Qe6+ Qf7
26. Qxh6 Qg7
27. Qe6+ Bf7
28. Qxd6 etc.

Premium Chessgames Member
  Gypsy: < maxundmoritz: After 26...Qf7, 27.Qxh6 Qg7 28.Qe6+ Bf7 29.Qxd6 is almost forced and looks like an interesting alternative. > Quite interesting, I agree. For instance 29...Qxd4 fails to 30.Bh7+ Kg7 31.Qh6+...
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  Gypsy: <maxundmoritz> Your position is close to the one after 24.Nxd6 cxd6 25.Qe6+ Bf7 27.Qxd6, but different. Here the defense 27...Qxd4 works. (The similarity messed my calculations up however.)
Feb-25-05  your brilliance: I saw the 25 Nxc7, and the ensuing theme in the line given by <maxundmoritz>, not quite the one in the game. But, what if black does not take the knight? Doesn't 25 ...Bf7 make white's task harder?
Feb-25-05  2ndNature: I saw the thing (or at least it's beginning...) but most likely wouldn't play it in a real game. Somehow getting Q+3P for N+B+R didn't appeal to me.

Couldn't Black have played better after, let's say, 31.Qxd6 ?

Feb-25-05  jahhaj: <your brilliance> I think Black just ends up two pawns down, 26 ♘e6 ♗xe6 27 ♕xe6+ followed by 28 ♕xh6
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"Konstantin Aseev born 20th October 1960 died on 22nd August 2004 at the age of 43 after a long illness. Aseev hadn't played since October last year and was a coach to Andrei Kharlov and Maia Chiburdanidze. He became an IM and then a GM in the early 1990s. He had a rating high of 2591 in 2001-2. He made significant contributions to theory in the Rauzer Attack and Queen Indian Defence.

Alex Yermolinsky shares his memories of his fellow Grandmaster, who he first met in 1983, after Aseev moved to Leningrad after growing up in a small town on the Volga.

"Konstantin was friendly but reserved. One of those rare people who think of others more than themselves. I still remember our game from the 1983 Leningrad Absolute Championship where we played in the last round and a win gave either of us the title. After a tough battle it finally ended in a victory for me. The first to congratulate me was Konstantin who gave me a big bear hug and said how well I had played."

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  patzer2: After his resignation, I'm sure Aseev gave Kiriakov a hardy congratulations on playing the winning deflection combination beginning with 25. Nxc7!! (today's daily puzzle solution).

However, in post game analysis, I would think that both players observed 27. Qxh6! wins quicker and with fewer complications than the pretty deflection (decoy) move 27 Bh7+! To illustrate, an analysis with Fritz 8 follows:

<25.♘xc7!! ♕xc7> declining the offer is futile [25...Bg6 26.Qe6+; 25...Bf7 26.Ne6 Re8 27.Nxg7 Rxe1+ 28.Rxe1 Kxg7; 25...Bd7 26.Ne6 Re8 27.Nxg7] <26.♕e6+ ♕f7 27.♗h7+!> this decoy move is effective but more efficient is

27.♕xh6! ♕g7 28.♕e6+ ♗f7

[28...Qf7 29.Bh7+ Kh8 (29...Kg7 30.Qh6+ Kh8 31.Bg6+ Kg8 32.Qh8#) 30.Bg6+ Kg7 31.Bxf7 Bxf7 32.Qh6+ Kg8 33.Qh8#]

29.♕xd6 ♖d8

[29...Na5 30.Rh7 Qxh7 31.Bxh7+ Kg7 32.Bd3 ]

30.♕xc6 ♕xd4 31.♗h7+ ♔f8 32.♕h6+ ♕g7

[32...Ke8 33.Bf5 Qe5 (33...Qxc4 34.Re1+) 34.Qxg5 Rd6 (34...Qd4 35.Re1+ Kf8 36.Qe7+ Kg7 37.Rh1 Kg8 38.Be6 Bxe6 39.Qxe6+ Kg7 40.Rh5) 35.Bd7+]

33.♕xb6 ♖e8 34.♕xa6

Premium Chessgames Member
  patzer2: <maxundmoritz: After 26...Qf7, 27.Qxh6 Qg7 28.Qe6+ Bf7 29.Qxd6 is almost forced and looks like an interesting alternative.> Sorry for not giving you credit for first posting the idea. Not only is it an interesting alternative, it is (in my opinion) the better alternative (especially over the board).
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  patzer2: <jahhaj: <your brilliance> I think Black just ends up two pawns down, 26 Ne6 Bxe6 27 Qxe6+ followed by 28 Qxh6> It's far worse than that for Black:

Analysis by Fritz 8 (@ 17 depth):

1. (7.28): 27...Rf7 28.Qe8+ Rf8 29.Qxc6 Qxd4 30.Bf5 Qg7 31.Re1

2. (13.81): 27...Qf7 28.Qxh6

3. (#3): 27...Kh8 28.Rxh6+ Qxh6 29.Qxh6+ Kg8 30.Qh7#

Feb-25-05  WillC21: <patzer2> I have noticed you have used for some position analysis in the past. What is the strength of that chess engine and why did you choose it in the past? Just curious. Thanks.
Premium Chessgames Member
  patzer2: <WillC21> At the time, I didn't have Fritz 8. I really can't judge the computer's strength under controlled situations, since I can't force it to go beyond its "long analysis" offered on the internet. However, while it gave some sound analysis, it sometimes gave very disappointing results (i.e. missing mate in four etc.). So I bought both CM 9000 and Fritz 8. Fritzs 8 has turned out to be the most user-friendly (and in my opinion the strongest) for analysis.
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  kevin86: Oh,when the pawns come marching in...

White finds every way to gain these little monsters every chance he gets-to black,they were expendable. Look who won!

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  Bobsterman3000: This is the most entertaining game I've seen in a while...
Feb-25-05  MatrixManNe0: Saw this in a jiffy. Nxc7 pulls the queen away and takes advantage of the weak h-file. After the exchange white, IMO, has a clear advantage (2 passers and black is the proud owner of a weak king/queenside). His best bet might have been to transpose to a losing endgame, but to stay in the middlegame is autrocious! The h-file would have been disastrous!

In my chess book about intuitive sacrifices, one does not need to calculate but about five moves ahead to justify his sacrifice, especially in an unclear position.

Feb-25-05  maxundmoritz: <patzer2> No problem. I do enjoy these puzzles most that have a few interesting alternatives. Your analysis here and in many other puzzles is very helpful to me. Thanks.
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