Nana Dzagnidze vs Sopiko Guramishvili (2013) Nana From Heaven

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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

White to move.

ANALYSIS [x]

1-0

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

FEN COPIED

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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> click for larger view 17 f2x♗g3! ▢ <clearance: f2-sq> click for larger view (VARIATION) 17 h2x♗g3? click for larger view <TODO> 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> click for larger view click for larger view 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. (VARIATION) 18 ... ♘g3-e2++ 19 ♔g1-f2! ▢ click for larger view The <POWER OF CALCULATION>.

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. ---- http://belgrade2013.liveschach.net 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 ? click for larger view How to <RECAPTURE> on g3, with the f2-pawn or the h2-pawn? IT MAKES A HUGE DIFFERENCE!!! 17 f2x♗g3!▢ click for larger view 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 (VARIATION) 17 h2x♗g3? ♘e4xg3 18 ♗g2x♗h3 ♘g3xe2++ click for larger view 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 <SUMMARY> 17 f2x♗g3!▢ wins for White because she has the click for larger view click for larger view <ZWISCHENZUG> 18 ♗g2x♗h3!▢ click for larger view and can meet the <DOUBLE CHECK> 18 ... ♘g3xe2++ with 19 ♔g1-f2!▢ . click for larger view

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.

Aug-21-13		kevin86: I wonder if they grow peanuts there...lol

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