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Evgeny Zagorjansky vs Alexander Konstantinopolsky
Sverdlovsk (1943), Sverdlovsk (Yekaterinburg) URS , rd 9, May-06
Queen's Gambit Declined: Three Knights Variation. General (D37)  ·  0-1

ANALYSIS [x]

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sac: 24...Rxc5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Jul-19-19
Premium Chessgames Member
  fredthebear: FTB is certain Fred Reinfeld included this nifty finish in his 1001 Brilliant Ways to Checkmate book.

A centralized knight is troublesome. Raking bishops are powerful. A rook infiltrating on the 2nd/7th is restrictive. Combine all three, and she's an attractive mate!!

Apr-04-20
Premium Chessgames Member
  beatgiant: An interesting nuance, which took me time to notice, is that 30. Rdc1 Nxc5 31. Bxc5 <Rc8> is a winning pin.

This explains why Black had to play <29...hxg6!> If he had played 29...fxg6 instead, in the end of the pin sequence above, White would be able to break the pin with <Bc4>, because it would come with check.

Apr-04-20
Premium Chessgames Member
  al wazir: 28. gxf5 Nxf2 29. fxg6 Nxd1 30. gxh7+ Kxh7 31. Bxd1 looks dead even.
Apr-04-20
Premium Chessgames Member
  halito27: 28. gxf5 Qf6 and black remains at least a piece up.

Best for white is probably 29. Qf1 Nxc5 30. Bxc5 and then Qc6! nabs the bishop due to the threat of Qh1.

Apr-04-20  Walter Glattke: I wonder, what happens after 28.-Nxc5 A) 29.Qxc5 Qe4 30.Kf2 Qg2+ 31.Ke1 Rc8 or B) 29.Qxg6 fxg6 30.Bxc5 Rc8 C) 28.-Ba7 29.Qxg6 hxg6 wins a piece. D) 25.-Neg4 26.Qe1 Nxe3 27.Rd3 Ba7 28.Rc7 is that possible? Maybe D) is the answer.
Apr-04-20  Brenin: 27 Qg2 looks playable, e.g. Nxc5 28 Nc6, and White might be able to survive.
Apr-04-20  goodevans: <27.Nf5?!> is a tricksy move that only fails because of <28...Ba7!>. I wonder if black saw that back when he started all this with 24...Rxc5.

White must have underestimated 28...Ba7 when playing 27.Nf5 (or missed it altogether). Simply moving his Q would have been better.

Apr-04-20  SpamIAm: Agreed, <Brenin>. In your line he is down a pawn but has some counterplay. In the game white tried to create complications with 27.Nf5 but he ended up down even more material (rook for black's bishop and knight). Later on 34.gxf5? is a huge blunder but it did lead to a pretty mate. Perhaps white was in time trouble.
Apr-04-20  Johnraho: Thanks <beatgiant> for that. Was wondering why hg vs fg
Apr-04-20  frandifran: Good, very nice
Apr-04-20
Premium Chessgames Member
  agb2002: White threatens Nxb7 and Nxa6.

The white side of the a8-h1 diagonal looks vulnerable and c5 is defenseless. These details lead to consider 24... Rxc5 25.Rxc5 Neg4 (25... Nxe4 26.fxe4 Qxe4 27.Kf1 and Black might not have enough compensation for the material) but the position looks unclear after 26.fxg4 Nxe4 27.Nc6 (threatens Ne7+ and blocks the diagonal) 27... Bxc6 28.Qf3 Nxc5 29.Qxc6.

Apr-04-20  beenthere240: 27. Qg2! avoids the disaster. . Nf5?! looks good but gets busted.
Apr-04-20
Premium Chessgames Member
  chrisowen: Right now choose it no?
Apr-04-20
Premium Chessgames Member
  chrisowen: It had to be tus?
Apr-04-20
Premium Chessgames Member
  thegoodanarchist: I got all the way up to 27.Nf5, which I did not see. This was a clever try by White, but his pieces were too uncoordinated to save the game.
Apr-04-20  RandomVisitor: as <beenthere240> points out, 27.Qg2 results in an even game:


click for larger view

Stockfish_20040215_x64_modern:

<53/49 05:23 0.00 27.Qg2 Nxc5 28.Nc6> Bxc6 29.Qxc6 Ne4 30.Bf3 Nc3 31.Bc5 Nxd1 32.Bxf8 Kxf8 33.Qc8+ Ke7 34.Qxb8 Qd3 35.Qxb4+ Kd7 36.Qb7+ Kd8 37.Qb6+ Ke8 38.Bc6+ Ke7 39.g5 g6 40.Bb7 Ne3 41.Qc5+ Ke8 42.Bxa6 Qxa6 43.Qxe3 Qxa2 44.Qd3 Qa1+ 45.Kf2 Qb2+ 46.Kf3 Qxh2

Apr-04-20  RandomVisitor: 24.Rxc8 is good for white:


click for larger view

Stockfish_20040215_x64_modern:

<41/68 05:46 +1.72 24.Rxc8 Bxc8 25.Nc5> h5 26.Kf1 Re8 27.Nc2 a5 28.Ne1 h4 29.g4 Nexg4 30.fxg4 Nxg4 31.Bxg4 Qxg4 32.Qf3 f5 33.Qxg4 fxg4 34.Kg1 h3 35.Ned3 Rd8 36.Rc1 Rf8 37.e5 Ba7 38.Nf2 Rf3 39.Nxg4 Bb6 40.Rc4 Bxc5 41.Rxc5 Ba6 42.Rc1 Kf7 43.Bb6 Rc3

...while 21...g5 is good for black:


click for larger view

Stockfish_20040215_x64_modern:

<40/65 03:19 -3.81 21...g5 22.Be2 g4 23.f4 Nxe4> 24.Qg2 Nd7 25.Bxa6 Ba8 26.Bb5 Nc3 27.Bc6 Nxd1 28.Rxd1 Nf6 29.Bxa8 Rxa8 30.Re1 Nd5 31.Bf2 Nc3 32.f5 exf5 33.Nxc3 bxc3 34.Qd5 Rfd8 35.Nxf5 Qg5 36.Bd4 Bf8 37.Qe5 Rxd4 38.Nxd4 Qxe5 39.Rxe5 Rxa2 40.Rg5+ Kh8

Apr-04-20
Premium Chessgames Member
  chrisowen: Cj Mackintosh no?
Apr-04-20
Premium Chessgames Member
  Tiggler: Unusual pair of double checks at the end prevent any attempted futile moves by white.
Apr-04-20  SpamIAm: <RandomVisitor>, this is kind of a reversal of the famous chess saying "If you see a good move, look for a better one!" Here white saw a good move and looked for a worse one.
Apr-04-20  RandomVisitor: <SpamIAm>Maybe someday chess clocks will be able to track the eye focus positions of the players, and we will be able to 'see' what they are focusing on, at diffenent points in the game...
Apr-04-20
Premium Chessgames Member
  al wazir: <halito27: 28. gxf5 Qf6 and black remains at least a piece up.> Thanks.

But after 29. Qf1 Nxc5 30. Bxc5 Qc6, the win isn't that easy. I think it goes like this: 31. Bxf8 Qh1+ 32. Kf2 Qxh2+ 33. Ke1 Bxg3+ 34. Kd2 Bg2.

Apr-04-20  Cheapo by the Dozen: Nice attack. Bad puzzle.
Apr-05-20  SpamIAm: <RandomVisitor> Fascinating possibility, sort of like those devices in cars that track eye movement to see if the driver is sleepy. Can imagine a player trying to hack their opponent's clock in order to get an advantage. ;)
Apr-05-20
Premium Chessgames Member
  beatgiant: <al wazir>
<after 29. Qf1 Nxc5 30. Bxc5 Qc6, the win isn't that easy. I think it goes like this: 31. Bxf8 Qh1+>

On 31. Bf8?? in this line, Black has mate in a few with <31...Ba7+>

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