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Ivan Ivanisevic vs Artur Gabrielian
European Championship (2012), Plovdiv BUL, rd 9, Mar-29
Neo-Grünfeld Defense: Goglidze Attack (D70)  ·  1-0



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sac: 20.Nxg5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Premium Chessgames Member
  wordfunph: total annihilation 35.Rh6! white rook asking the black queen, where are you going?
Premium Chessgames Member
  drollere: my first thought was that this was a position that only chess software could love.

after about a minute, i chose

20. Nxg5 hxg5
21. h6 Bh8
22. h7+ Kf7
23. Bxg5 Ke8
24. Rh6

but lost the thread in black's countermoves.

it's interesting that black's position is weak because he has no pawn support for his pieces, and needs three pawn moves to catch up, while defending threats. meanwhile, white only needs one pawn move to clear the way for the Q.

Premium Chessgames Member
  drollere: what follows the reply 20...Bxe5?
Premium Chessgames Member
  agb2002: The position suggests 20.Nxg5 (20.Bxg5 hxg5 21.Nxg5 Bh6) and a quick scan yields:

A) 20... hxg5 21.Bxg5 followed by g4 opening the g-file or the b1-h7 diagonal.

B) 20... f4 21.Qd3

B.1) 21... hxg5 22.Qh7+ Kf7 23.Bf5+ wins decisive material.

B.2) 21... Rfd8 22.Qh7+ Kf8 23.Bxf4 hxg5 24.h6 looks winning.

C) 20... Nxe3 21.Qxe3 hxg5 (21... f4 22.Qd3 as in B) 22.Qxg5 followed by h6 recovers the piece (22... Kh7 23.Qg6+ Kg8 24.h6).

Jun-20-20  Brenin: Black can decline the sacrifice with 20 ... Qc6 (defending h6), e.g. 21 Nh3 Nxe3 22 Qxe3 Bxa2+ 23 Kxa2 Qxc2, with material equality. Alternatively, he can accept the sacrifice, and then after 20 ... hxg5 21 h6 offer the piece back with Bf6, defending g5. Neither line looks very attractive, but they are probably better than the line played.
Jun-20-20  stacase: One of those little sayings when you post says, "Knights on the rim are dim" so maybe White can get two pawns for that dim bulb and play it by ear after that.
Jun-20-20  Brenin: 24 ... f4, preventing White from getting the Q into the attack with 25 f4 and 26 Qh3, and threatening counterplay with Ne3 and c5, would have been a better defence than the passive 24 ... c6. Later, 25 ... Rc7 looks pointless; why not the obvious Be6, overprotecting the P on f5, and allowing Qd5 and Kd7. And 26 ... e6 was a blunder, empowering the B on g5 and denying the K an escape route via d8, but Black was probably lost anyway by then.
Premium Chessgames Member
  malt: Went with 20.N:g5 Qb5

(20...hg5 21.h6 Bh8 22.h7+ Kf7 23.B:g5 )

21.a4 Qb6 22.Nh3 N:e3 23.Q:e3 c5 24.dc5 Q:c5
25.Q:c5 R:c5 26.Nf4

23...c5 looks stronger than ...Ke8

Premium Chessgames Member
  thegoodanarchist: I got yesterday's, and this one too.

I must be improving.

Premium Chessgames Member
  chrisowen: ok ha greasy pole no?
Premium Chessgames Member
  Predrag3141: After 25 minutes of thought, the great Silicon Grandmaster finally decided to capture on g5, with a slight advantage for White.

+0.64 (31 ply) 20.Nxg5 hxg5 21.h6 Bh8 22.h7+ Kf7 23.Bxg5 c5 24.Bb3 b5 25.Ka1 cxd4 26.Qxd4 Rfd8 27.f4 a5 28.Qd3 Ke8 29.Rh6 Nxe5 30.fxe5 Bxb3 31.Qxd7+ Rxd7 32.Rxd7 Kxd7 33.axb3 Bxe5 34.Rb6 Rc2 35.g3 Bxb2+ 36.Kb1 Rh2 37.Rxb5 Bc3 38.Rb7+ Kd6 39.Rxe7 Rb2+ 40.Kc1

Jun-20-20  RandomVisitor: <drollere: my first thought was that this was a position that only chess software could love.>

After 5 minutes of thought Stockfish scores this position as +1.37 favoring white. After 16 minutes of thought it changed its 'mind' and scored the position +0.00.

And now, it changes again:

click for larger view


<52/92 1:04:24 +0.53 20.Nxg5 hxg5 21.Bxg5 Kf7 22.f4> Ke8 23.h6 Bh8 24.h7 Kd8 25.Rh6 b5 26.Bd3 Rb8 27.Qb4 Rb6 28.b3 Ne3 29.Rxb6 axb6 30.Re1 Nxg2 31.Re2 Rf7 32.Bxb5 Qe6 33.Bc4 Nxf4 34.Bxf4 Rxh7 35.Qb5 Bxc4 36.bxc4 Rg7 37.Qa4 Rg1+ 38.Kb2 Qd7 39.Qa8+ Qc8

Jun-20-20  stacase: <Predrag3141: After 25 minutes of thought, the great Silicon Grandmaster...>

Ha ha ha ha! The GSGM must never consider those little rules of thumb in Chess. Knights on the rim are dim and worth no more than two pawns, at least that's what I came up with and I'm no grand master my best game was a win over a guy rated 1500 almost 30 years ago.

Jun-20-20  RandomVisitor: Stockfish continues to dig deep into exploring lines in this complicated position, which after 3.75 hours of 'thought', it 'thinks' is even:

click for larger view


<61/76 3:42:28 0.00 20.Nxg5 hxg5 21.Bxg5 Kf7 22.g4 fxg4> 23.Rhf1 Ke8 24.Bg6+ Bf7 25.Bxf7+ Rxf7 26.fxg4 Rxf1 27.Rxf1 Qe6 28.h6 Bh8 29.Qd3 c5 30.Qh7 Kd7 31.b3 Rg8 32.Rf5 Kc6 33.bxc4 Qxc4 34.Qxe7 Qd3+ 35.Kc1 Qc4+

Premium Chessgames Member
  Predrag3141: < RandomVisitor: Stockfish continues to dig deep into exploring lines in this complicated position, which after 3.75 hours of 'thought', it 'thinks' is even>

After 25 minutes, 20 Bb3 was tied for second. After 3.75 hours, is that now tied for first? Here is what Stockfish gave after 25 minutes:

3) =0.00 (32 ply) 20.Bb3 Qc6 21.Ka1 Nxe3 22.Qxe3 Rfd8 23.Rhe1 Qb6 24.Bc2 Rf8 25.Kb1 e6 26.Bb3 Bxb3 27.axb3 Rf7 28.Nxg5 hxg5 29.Qxg5 Kf8 30.h6 Bh8 31.Rh1 Qxb3 32.h7 Rxh7 33.Rxh7 Qxd1+ 34.Ka2 Qa4+ 35.Kb1 Qd1+

Jun-20-20  RandomVisitor: {Predrag3141><After 25 minutes, 20 Bb3 was tied for second. After 3.75 hours, is that now tied for first? >My 3.75 hour Stockfish run only says which move is best, it is not setup to declare which move is next best..

In the game as played, 21.h6 does not seem to work:

click for larger view


<51/83 15:35 0.00 21...Bh8 22.Bxg5 Kf7 23.f4> c5 24.Rhe1 e6 25.g4 fxg4 26.Ka1 cxd4 27.Qd3 Ke8 28.Qxd4 Qb5 29.Bg6+ Kd7 30.f5 Kc7 31.Be7 exf5 32.b3 Nxe5 33.Bxf8 Rxf8 34.Rxe5 Kb8 35.Kb1 Be4+ 36.Qxe4 Bxe5 37.Bxf5 g3 38.Bh3 Rf2 39.Rd5 Rb2+ 40.Kc1 Qc6+

Jun-20-20  RandomVisitor: <Predrag3141>A long run indicates white's next best moves, at move 20, other than 20.Nxg5:

click for larger view


53/82 1:36:19 -0.74 20.Bb3 Qc6 21.Rc1 b5 22.Nf2 Qb6 23.Nd1 f4 24.Bf2 Rfd8 25.Bxc4 Bxc4 26.b3 Bf7 27.Qc6 Be8 28.Qc5 a5 29.Qxb6 cxb6 30.Nc3 a4 31.Kb2 Bxe5 32.dxe5 Rd2+ 33.Rc2 Rxc2+ 34.Kxc2 b4 35.Bd4 Kf7 36.bxa4 bxc3 37.Bxc3 Bxa4+ 38.Kd2 Rd8+ 39.Ke2 Be8

53/82 1:36:19 -0.83 20.Ka1 Qe6 21.Rhe1 Nxe3 22.Rxe3 Bxa2 23.b3 c5 24.dxc5 b6 25.Kxa2 Rxc5 26.Qb2 Bxe5 27.Rxe5 Qxe5 28.Rd7 Qe6 29.Rd2 Rd5 30.Rxd5 Qxd5 31.Nf2 Qa5+ 32.Kb1 Qe1+ 33.Bd1 Rc8 34.Qd4 Rc6 35.Qd5+ Qe6 36.Qd4 Rd6 37.Qc3 Qf6 38.Qc2 Rc6 39.Qd3 Kg7

Premium Chessgames Member
  Predrag3141: Thanks!

All of White's evaluations seem to go down with time.

Shorter runs than 25 minutes posted above seem to put White up a little more than a pawn.

At 25 minutes Nxg5 was slightly in favor of White and it eventually went down to equal; and Bb3 was equal, and it eventually went down to slightly in favor of Black.

Jun-20-20  mel gibson: I saw the first few moves -

Stockfish 11 agrees but the score is close to a draw after 6 minutes of processing:

20. Nxg5

(20. Nxg5 (♘h3xg5 h6xg5 h5-h6 ♗g7-h8 ♗e3xg5 ♔g8-h7 g2-g4 e7-e6 ♖h1-h5 ♘c4xb2 g4xf5 e6xf5 ♔b1xb2 c7-c5 f3-f4 c5xd4 ♕c3-b4 ♖c8xc2+ ♔b2xc2 ♖f8-c8+ ♔c2-b2 ♖c8-c4 ♕b4-e7+ ♕d7xe7 ♗g5xe7 ♗d5-f3 ♖h5-h1 d4-d3 ♗e7-g5 ♖c4-c2+ ♔b2-b3 ♗f3-d5+ ♔b3-b4 a7-a5+ ♔b4xa5 ♗d5xh1 ♖d1xh1 ♖c2-g2 ♖h1-d1 ♗h8xe5 ♖d1xd3 ♖g2xa2+ ♔a5-b5 ♗e5-h8 ♖d3-d7+ ♔h7-g6 ♖d7-d8 ♖a2-b2+ ♔b5-c4 b7-b5+ ♔c4-c5 ♗h8-c3 ♖d8-d6+ ♔g6-h7 ♖d6-b6 b5-b4 ♖b6-b5 ♔h7-g6 ♔c5-c4 ♖b2-h2) +0.79/39 360)

score for White +0.79 depth 39

Jun-20-20  RandomVisitor: A final look: the machine can find no advantage for White after 12.Nxg5 and 12.5 hours of 'thought'.

click for larger view


<68/101 12:35:01 0.00 20.Nxg5 hxg5 21.Bxg5 Kf7 22.f4 Ke8> 23.h6 Bh8 24.h7 a5 25.Ka1 b5 26.Rh6 a4 27.Rg6 Kd8 28.g4 fxg4 29.f5 c6 30.Bf4 e6 31.f6 Qxh7 32.Bd3 Kc7 33.Rg7+ Qxg7 34.fxg7 Rxf4 35.Bxc4 bxc4 36.Qa5+ Kb7 37.Qb4+ Ka6 38.Qxa4+ Kb7 39.Qb4+ Ka6

Jun-20-20  RandomVisitor: At move 18 White had Nh3:

click for larger view


<50/77 12:25 +1.74 18.Nh3 h5 19.Bg5> c5 20.Nf4 e6 21.Rhe1 cxd4 22.Qxd4 Nxe5 23.Nxd5 Qxd5 24.Qxd5 exd5 25.Rxd5 Rce8 26.Bb3 Kh8 27.Red1 Rc8 28.a4 a6 29.Rd6 Rc6 30.Rxc6 Nxc6 31.Rd7 b5 32.axb5 axb5 33.Rc7 Ne5 34.Kc2 Bf6 35.Rc5 Nd7 36.Bxf6+ Rxf6 37.Rxb5 Rc6+

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