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Gata Kamsky vs Daniel Naroditsky
US Championship (2017), St Louis, MO USA, rd 7, Apr-05
Spanish Game: Closed. Bogoljubow Variation (C91)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Apr-05-17  RookFile: Pretty attack by Kamsky.
Apr-05-17  Strelets: <Rookfile> Into the middlegame it's all about the struggle for d5. Black's position became extremely difficult the very move Gata was able to get a knight there. He kept it hanging over Naroditsky's head until he was able to cash in by doing irreparable damage on the kingside. Classic positional chess.
Apr-06-17
Premium Chessgames Member
  Gilmoy: After <11..c6 13.dxc6 14..Qxc6>, the Closed Ruy slowly morphs into ... a Sveshnikov.

If Kamsky can't win <with> the Sveshnikov, he'll win against <your> Sveshnikov. First, he makes you play it ...

Apr-06-17  paavoh: Excellent maneuver with the b pawn, and a beautiful switch by the Rook (c3-c7-c7 --> g3).
Sep-09-18  mel gibson: I couldn't find that move today &
neither did Stockfish 9:

34. Qxc3

(34. Qxc3 (♕d3xc3 ♗f6-h4 ♕c3-f3 ♖a6-a3 ♖e1-e3
♖a3xe3 f2xe3 ♗h4-g5 h3-h4 ♗g5-h6 g2-g4 g7-g5 f5xg6/ep f7xg6 ♕f3-f6 ♖d8-e8 h4-h5 ♗h6-g7 ♕f6-h4 ♕a7-d7 h5-h6 ♕d7xg4+ ♕h4xg4 ♗c8xg4 h6xg7 ♔g8xg7 ♖d1-b1 ♖e8-b8 b4-b5 ♗g4-f5 ♗e4xf5 g6xf5 b5-b6 ♔g7-f7 b6-b7) +2.43/30 )

score for White +2.43 depth 30

Sep-09-18  Walter Glattke: One could play here 34.Nxf6+ gf6 35.Qg3+ Kf8 36.Qh5 Ke7 but then 37.Rc1 (37.-Ra2 38.Re3 Bb7!? 39.R3xc3 Bxe4 40.Rc7+ Rd7 41.Rxa7 R7xa7 42.Qxe4) 37.-d5 38.Bc2 e4 (d4? Rxe5+) 39.g4 seems to be good for white.
Sep-09-18  Mayankk: I would have happily gobbled the c pawn, kept Black’s dark-squared Bishop out of play at f6 and used my other pieces to push the b pawn forward.

Not sure why is it important to push the b pawn first and eat the c pawn later. Keeping aside the computer lines, strategically it seems about the same.

Sep-09-18
Premium Chessgames Member
  malt: There's not much to go on, like <Walter > went with 34.N:f6+ gf6 35.Qg3+ Kh8 36.Q:c3 Rg8 37.b5 Rb6

Black could not play this if I had kept the knight, so I tried

34.b5 Ra3 35.Rc1 Qd4 36.Qg3 Kf8 37.b6 Rd7 38.N:c3

Maybe should have tried 34.Q:c3

Sep-09-18
Premium Chessgames Member
  WorstPlayerEver: I had 34. Qg3 Kf8 35. Qxc3 Bd7 but then I got stuck.

Sf 34. Qg3 Kf8 35. Qxc3 Bd7 (SF gives 35... Bb7) 36. Qf3 Bg5 37. Rb1 Ra3 38. Qh5 h6 39. h4 Bd2 40. Red1 Qd4 41. Qe2 Ra2 42. f6 Bf5 43. Bxf5 Qxd5 44. b5 gxf6 45. g3 and SF does not know if the position is won.


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Sep-09-18
Premium Chessgames Member
  WorstPlayerEver: 34. b5 Ra3 35. Qc4 and Black is lost:


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Kf8 36. b6 Qa6 37. Qc6 Qb7 38. Qxb7 Bxb7 39. Nxf6 gxf6 40. Bxb7 Rb8 41. Bf3 Rxb6


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--------

34. b5 Ra3 35. Qc4 Kf8 36. b6 Qa6 37.Qc6 Bh4 38. Nxc3 Bb7 39. Qc7


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Sep-09-18
Premium Chessgames Member
  WorstPlayerEver: Another spectacular line:

35. Qc4 Ra4 36. Qxc3 Qd7 37. Qb2 Rd4 38. Nxf6+ gxf6 39. Rxd4 exd4 40. Qxd4 d5 41. Qxf6 dxe4 42. Rxe4 Qd1+ 43. Kh2 Qd6+ 44. Qxd6 Rxd6 45. Re8+ Kg7 46. Rxc8


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Sep-09-18  Walter Glattke: I did not calculate with 35.-Kh8 because of 36.Qh5, but 36.-Qe7 37.Rxc3 Rb6 38.Rec1 Bd7 37.Bd5 (Q guards b4) Bxf5 38.Rc7 Rd7 39.Rc8+ Rd8 40.R1c7 Qe8 and now the black constellation gets instabile, so 37.-Rg8 38.Kh2 Rg7 39.Rc7 it's not easy, not for stockfish, not for me.
Sep-09-18
Premium Chessgames Member
  agb2002: White has a bishop and a knight for the bishop pair and a pawn.

White can weaken the black castle with 34.Nxf6+ but the attack doesn't look very clear at the moment and Black has pressure on f2.

The advance of the b-pawn is likely more problematic for Black, for example 34.b5 Ra3 35.b6 Qa8(b7) 36.Nxf6+ gxf6 37.Bxa8(b7) wins too much material, but on the board I think I'd play 34.Qxc3 and then prepare to push the b-pawn.

Sep-09-18  cormier:


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Analysis by Houdini 4: d 24 dpa

1. + / - (1.13): 21.Rxa8 Bxa8 22.Nf5 Bd8 T 23.Rd1 Nc8 24.Bxf6 Bxf6 25.Bb3 Bc6 26.Nh2 Kf8 27.Qf3 Qb7 28.Bd5 Bd8 29.Qd3 Be7 30.Bxc6 Qxc6 31.Qd5 Qxd5 32.Rxd5 g6 33.Nxe7 Kxe7 34.Rxb5 Ke6 35.Nf3 h6 36.Nd2 f5 37.Kh2 fxe4 38.Nxe4 Kf5 39.f3

2. + / - (1.13): 21.Nf5 Rxa1 22.Rxa1 Bd8T

Sep-09-18  cormier:


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Analysis by Houdini 4: d 25 dpa done

<1. = (0.17): 20...h6> 21.Rxa8 Nxa8 22.Bxf6 Bxf6 23.Rd1 Bc8 24.Ne1 Bg5 25.Bb3 Nb6 26.Nc2 g6 27.Nf1 Rd8 28.Nb4 Qc5 29.Nd2 Bb7 30.Nf3 Nc4 31.Nxg5 hxg5 32.Nd5 Kg7 33.Bxc4 bxc4 34.Qg4 Ra8 35.Qxg5 Bxd5 36.exd5 Qb6 37.Rb1

2. = (0.21): 20...Rxa1 21.Rxa1 h6 22.Bxf6 Bxf6 23.Bd3 Nc4 24.Nd2 Rc8 25.Bxc4 bxc4 26.Nf5 d5 27.exd5 Qxd5 28.Ne3 Qd3 29.Kf1 Be4 30.Nxe4 Qxe4 31.Qc2 Qxc2 32.Nxc2 Bg5 33.g3 Rb8 34.Rb1 e4 35.Na3 Rc8 36.Rd1 Be7 37.Rd4 Bxa3 38.bxa3 f5 39.a4 Kf7 40.Ke2 Ke6 41.h4 Ke5 42.h5 Rb8 43.Rxc4

3. + / = (0.59): 20...Bc8 21.Bd3 Bd7 22.Nf5 Bxf5 23.exf5 Rxa1 24.Rxa1 Nc4 25.b3 e4 26.Bxc4 exf3 27.Bxb5 Qxc3 28.Qe1 Qxe1+ 29.Rxe1 Rb8 30.Bc4 Kf8 31.gxf3 Rc8 32.Kf1 d5 33.Bxf6 Bxf6 34.Bxd5 Rc2 35.b4 Bd4 36.Re2 Rxe2 37.Kxe2 Ke7 38.f4 f6 39.Bg8 Kd6 40.Bxh7 Bc3 41.b5 Kc5 42.Kd3 Be1 43.b6 Kxb6 44.Ke3 Kc5 45.Bg6 Bc3

Sep-09-18  siggemannen: What happens after 44...Ke8?
Sep-09-18
Premium Chessgames Member
  Gregor Samsa Mendel: <siggemannen: What happens after 44...Ke8?> Things look pretty bad for black after 45 Bc6+.
Sep-09-18  siggemannen: <Gregor Samsa Mendel> <Bc6>, doh, thanks :)
Sep-09-18  landshark: <WorstPlayerEver> In this variation you offered: 34. b5 Ra3 35. Qc4 Kf8 36. b6 Qa6 37.Qc6 Bh4 38. Nxc3 Bb7 39. Qc7 - I think the exchange sac by Black -Rxc3 40. Qxc3 d5 leaves Black with the advantage - White must retreat the B, then -Qxb6 threatens to capture on f2, requiring further backpedaling by White. Black's bishops and mobile center look very threatening here -
Sep-09-18  patzer2: For today's Sunday (34. ?) puzzle, Kamsky's 34. b5! +- (+2.35 @ 37 ply, Stockfish 9) appears to be the best of three potential winning options.

In addition to 34. b5! +-, the simple pawn capture 34. Qxc3 +- (+2.33 @ 38 ply, Stockfish 9), as a second best move, is nearly as strong as 34. b5! +-.

Though a tempting possibility, the third best move 34. Qg3 ± (+1.80 @ 37 ply, Stockfish 9) isn't quite as strong a winning option as 34. b5! or 34. Qxc3 +-.

My pick was 34. b5! simply because it looked like a good in-between move to improve the position before following up with the capture of the c3 pawn and eventually playing Qg3.

P.S.: Black's game takes a big turn for the worse with 20...Qd7?, potentially allowing 21. Nf5! ± to +- (+1.54 @ 30 ply, Stockfish 9). Instead, 20...Rxa1 21. Rxa1 h6 = (0.00 @ 27 ply, Stockfish 9) holds the game level

Sep-10-18
Premium Chessgames Member
  WorstPlayerEver: <landshark> 34. b5 Ra3 35. Qc4 Kf8 36. b6 Qa6 37. Qc6 Bh4 38. Nxc3 Bb7 39. Qc7 Rxc3 40. Qxc3 d5


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41. g3 Be7 42. Qc7


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Or 41. g3 dxe4 42. Qc5+


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Nov-25-19
Premium Chessgames Member
  Sargon: E Steiner vs Capablanca, 1929

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