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Nana Dzagnidze vs Sopiko Guramishvili
"Nana From Heaven" (game of the day Aug-20-2013)
European Championship (Women) (2013), Belgrade SRB, rd 5, Jul-27
English Opening: Agincourt Defense. Catalan Defense (A13)  ·  1-0



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Kibitzer's Corner
Jul-27-13  notyetagm: N Dzagnidze vs S Guramishvili, 2013

<nerwal: ... In N Dzagnidze vs S Guramishvili, 2013, black tried to checkmate white's king by giving up two pieces on g3, <<<but maybe missed an important intermezzo with Bxh3 and there was no checkmate in sight.>>> Punishment was swift.>

Jul-27-13  notyetagm: N Dzagnidze vs S Guramishvili, 2013

16 ... ♗d6xg3? <unsound sac>

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17 f2x♗g3! <clearance: f2-sq>

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17 h2x♗g3?

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Figure out the difference between the <WINNING> 17 f2x♗g3! played by Dzagnidze and the losing 17 h2x♗g3? which Dzagnidze did *not* play.

It seems that 17 f2x♗g3! wins because it creates a <FLIGHT SQUARE> for the White g1-king to go to f2. That is, 17 f2x♗g3 is a great example of the <SQUARE CLEARANCE> theme. Having the f2-sq available to the White g1-king is what makes the winning <INTERMEZZO> 18 ♗g2x♗h3! ▢ possible

17 ... ♘e4xg3 18 ♗g2x♗h3! <intermezzo>

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as White can then respond to the <DOUBLE CHECK> 18 ... ♘g3xe2++ with 19 ♔g1-f2! ▢ and the Black attack is over, leaving Black two(!!) whole pieces down for very little compensation.

18 ... ♘g3-e2++ 19 ♔g1-f2!

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Jul-27-13  notyetagm: N Dzagnidze vs S Guramishvili, 2013

Of course <HOUDINI 3> immediately calculates that the speculative sacrifice 16 ... ♗d6xg3? is unsound, giving it an eval of <2.10 >.

Also note how <HOUDINI 3> also immediately sees that taking the other way (17 h2x♗g3?) is losing, giving that move an eval of <-2.19 >.

I wonder if Guramshivili (Black) considered the enormous difference between these seemingly nearly identical recaptures. Probably not. This is a point that I have seen NM Jorge Sammur-Hasbun make over and over again in analysis sessions: it can make a *huge* difference whether you play 17 f2x♗g3! or 17 h2x♗g3? , even though there seems very little difference between them at first glance. Only deep <CALCULATION> reveals the truth.

<CALCULATE LIKE A COMPUTER!> Dzagnidze playing White did, and she won easily as a result.


Computerkibitz: Houdini 3 Pro x64 Depth: 20 with 302.619 kN in 110s

<2.10 <<<17.fxg3>>> Bxg2 18.Kxg2 Nd6 19.h3 Qh5 20.Qd3 Nc4 21.Rxc4 dxc4 22.Qxc4 Ne7 23.e4 b5 24.Qc5 Qg6 25.Nc3 Qd6 26.Bc1 Rad8>

<-2.19 <<<17.hxg3>>>> Nxg3 18.fxg3 Qxg3 19.Nh4 Qxh4 20.Bxh3 Qxh3 21.Rc3 Qh4 22.Kg2 Nxd4 23.Rh3 Qe4+ 24.Kh2 Nxe2 25.Nc5 Qf4+ 26.Kg2 d4

-13.29 17.Bxh3 Bxf2+ 18.Kh1 Qxh3 19.Rg1 Bxg1 20.Qxg1 Re6 21.Nd2 Nxd2 22.Nc3 N

Jul-27-13  notyetagm: N Dzagnidze vs S Guramishvili, 2013

Game Collection: CALCULATE LIKE A COMPUTER! OR IVANOV. SAME THING 17 f2xBg3!, zwischenzug 18 Bg2xBh3 refute unsound Black attack

Jul-27-13  notyetagm: N Dzagnidze vs S Guramishvili, 2013

17 ?

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How to <RECAPTURE> on g3, with the f2-pawn or the h2-pawn? IT MAKES A HUGE DIFFERENCE!!!

17 f2x♗g3!▢

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Nana Dzagnidze was right on the money when she played the only move 17 f2x♗g3!▢ and not the <BLUNDER> 17 h2x♗g3? used in the variations below.

She correctly saw that she would have the <ZWISCHENZUG> 18 ♗g2x♗h3!▢ **only** if she could follow up the <DOUBLE CHECK> 18 ... ♘g3xe2++ with 19 ♔g1-f2!▢ .

The engine analysis below looks at the attempt to play the same <ZWISCHENZUG> idea 18 ♗g2x♗h3 but after the **incorrect** recapture 17 h2x♗g3?. That is, the variation under consideration is 17 h2x♗g3? ♘e4xg3 18 ♗g2x♗h3 ♘g3xe2++ shown in the diagram below. Now White loses(!) to the <DOUBLE CHECK> in this variation because she does not have the move 19 ♔g1-f2 available.

1: Nana Dzagnidze - Sopiko Guramishvili, European Individual Women's Championship 2013

17 h2x♗g3? ♘e4xg3 18 ♗g2x♗h3 ♘g3xe2++

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Analysis by Fritz 13:

1. (-5.46): 19.Kh2 Qxf3 20.Rg1 Qxf2+ 21.Rg2 Qf4+ 22.Kh1 Nxc1 23.Bxc1 Qh4 24.Kh2 Re1 25.Qd2 Nxd4 26.Qf4 Rxc1 27.Qxh4 Nf3+ 28.Kg3 Nxh4 29.Kxh4 a5 30.Nc5 Rc4+

2. (-#5): 19.Kh1 Qxf3+ 20.Kh2 Qxf2+ 21.Bg2 Qg3+ 22.Kh1 Qh4+ 23.Bh3 Qxh3#

3. (-#1): 19.Kf1 Qxh3#

(Hall, 27.07.2013)

Jul-28-13  notyetagm: N Dzagnidze vs S Guramishvili, 2013


17 f2x♗g3!▢ wins for White because she has the

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<ZWISCHENZUG> 18 ♗g2x♗h3!▢

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and can meet the <DOUBLE CHECK> 18 ... ♘g3xe2++ with 19 ♔g1-f2!▢ .

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Aug-20-13  offramp: Those crazy Georgians!
Aug-20-13  RandomVisitor: 16...Bxg2 17.Kxg2 Qf5 was likely best, with perhaps a small advantage for black.
Premium Chessgames Member
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