Ivan Sokolov vs Sigurbjorn Bjornsson (2004)

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Ivan Sokolov vs Sigurbjorn Bjornsson
European Club Cup (2004), Izmir TUR, rd 1, Oct-03
Queen's Gambit Declined: Harrwitz Attack. Main Line (D37) · 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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Oct-13-04		Hidden Skillz: pretty straight forward attackin chess..

Oct-13-04		jcmoral: What next?

Oct-13-04		Cyphelium: The threat is 29. Ng5! followed by Bd4.

May-17-19		onigorom: the threat is 29. Bd4, no defense

May-17-19		AlicesKnight: The way in was not too hard to see; Bc5 is one of those moves often called "quiet" - but effective.

May-17-19		malt: Apart from 28.Bc5, was looking at 28.Ng5.

May-17-19		JohnBoy: What’s wrong w 28.Ng5?

May-17-19		JohnBoy: Ah... 28.Ng5 Ra7. Watch the whole board!

May-17-19		Pedro Fernandez: Hi <chrisowen>, nice to post you! This is the more easy "difficult" puzzle I have solved here at CG. The only hard move, which I had to find out and analyze for about 10min, it was the last one, i.e. 28.Bc5! (28.Bb4 doesn't work due 28...d4 and the white bishop has not access to c3-square. 28.Ng5 works neither). Greetings my great friend!

May-17-19		agb2002: White has a bishop, a knight and a pawn for the bishop pair. Black threatens Bxf7. White has four pieces to attack the king, starting with 24.Rxf6 gxf6 25.Qg6: A) 25... Qd8 26.Qxh6+ Kg8 27.Qg6+ Kh8 28.Ng5 A.1) 28... fxg5 29.Be5+ and mate next. A.2) 28... Ra7 29.Bc5 A.2.a) 29... Rg7 30.Qh6+ Kg8 31.Bd4 A.2.a.i ) 31... Rf7 32.Nxf7 Bxf7 33.Bxf6 wins. A.2.a.ii ) 31... Rf8 32.Nxe6 wins decisive material. A.2.a.iii) 31... Rxg5 32.Bxf6 wins (32... Rxg2+ 33.Kxg2 Bh3+ -33... Qd7 34.Qh8+ Kf7 35.Qg7#- 34.Kxh3 wins decisive material). A.2.a.iv) 31... Qd7 32.Bxf6 wins decisive material. A.2.b) 29... Rc7 30.Bd4 looks winning. A.3) 28... Qd7 29.Qxf6+ Qg7 (29... Kg8 30.Be5 wins) 30.Qf4 A.3.a) 30... Kg8 31.Be5 Qh5 32.Qf6 Ra7 33.Nxe6 wins decisive material. A.3.b) 30... Qg6 31.Be5+ Kg8 32.Qh4 wins. A.4) 28... Qxd6 29.Qh7#. B) 25... Ra7 26.Qxe8+ wins. C) 25... Rf8 26.Bxf8 Rxf8 27.Qxh6+ Kg8 28.Qg6+ Kh8 29.Ng5 fxg5 30.Qh6+ Kg8 31.Qxe6+ followed by Qxd5 wins two pawns at least.

May-17-19		whiteshark: Quick check: click for larger view Black to move 1) +6.95 (25 ply) <28...Rf8 29.Nd4 Qd7 30.Bxf8 Rxf8> 31.Rc1 Rc8 32.Qxf6+ Kh7 33.Rc3 Re8 34.Nf3 Kg8 35.Qg6+ Kf8 36.Nd4 Qf7 37.Qh6+ Kg8 38.e4 Qg7 39.Rg3 Bg4 40.Qxg7+ Kxg7 41.f3 dxe4 42.Rxg4+ Kf7 43.Rf4+ Kg6 44.fxe4 Kg5 45.Ne2 Rh8 46.Rf3 Rh4 47.Nc3 b4 48.Rf5+ Kg6 2) +7.53 (24 ply) 28...b4 29.Ng5 Qd7 30.Bd4 Rf8 31.Bxf6+ Rxf6 32.Qxf6+ Qg7 33.Qxg7+ Kxg7 34.Nxe6+ Kf7 35.Nc7 Rc8 36.Nxd5 bxa3 37.bxa3 Rc4 38.f3 Rc5 39.e4 Rc2 40.Re1 Rd2 41.Re3 Kg7 42.f4 Rd1+ 43.Kf2 Rd2+ 44.Kg3 a5 = = = After <28...Rf8 29.Nd4 Qd7 30.Bxf8 Rxf8> click for larger view White to move 1) +6.94 (25 ply) 31.f4 Bg4 32.h3 Bxh3 33.Qh6+ Kg8 34.gxh3 Qh7 35.Qxh7+ Kxh7 36.Rc1 Kh6 37.Kf2 a5 38.Rc5 a4 39.Rxb5 Rc8 40.Nf5+ Kh7 41.Rb7+ Kh8 42.Nd4 Rc1 43.h4 Rh1 44.Kg3 Rg1+ 45.Kf3 Kg8 46.Ra7 Rb1 47.Ra6 Rxb2 48.Rxf6 2) +6.98 (26 ply) 31.Qh6+ Kg8 32.Qg6+ Kh8 33.f4 is line 1) 3) +6.81 (25 ply) 31.Rc1 Rc8 32.Qxf6+ Kh7 33.Rxc8 Qxc8 34.Qe7+ Kh8 35.h4 Bg4 36.f3 Bd7 37.Kf2 Qe8 38.Qd6 Qf7 39.Qxa6 Kg7 40.Qd6 Kh7 41.Ke2 Qg7 42.g4 Bxg4 43.fxg4 Qxg4+ 44.Kd2 Qxh4 45.Qxd5 Qf2+ 46.Ne2 Kg6 47.Qxb5 Qf5 all 1.0 minute analysis by Stockfish 9 v010218

May-17-19		chrisowen: <Pedro Fernandez> Things that go bump in the naght, bangers and mash!

May-17-19		cormier: click for larger view Analysis by Houdini 4 d 23 dpa done 1. + / = (0.48): 18...Qb6 19.Bd6 Rfc8 20.Bc5 Nb8 21.Bxb6 Rxc2 22.Rxf7 Kxh7 23.Rxb7 Nc6 24.b3 Rb8 25.Rxb8 Nxb8 26.Rd1 Rc3 27.Nd2 Kg6 28.Kf1 Be7 29.a4 Nc6 30.g3 bxa4 31.bxa4 Rc2 32.Nf3 Ra2 33.Kg2 Rxa4 34.Rc1 Nb4 35.Ne5+ Kf5 2. + - (1.94): 18...Bc8 19.Rc7 e5 20.Qxc6 Be6 21.Bxe5 Bxe5 22.Nxe5 Kxh7 23.Nxf7 Bxf7 24.Rxf7 Rxf7 25.Qxa8 Qd2 26.Qe4+ g6 27.Qe6 Rg7 28.Qe5 Rf7 29.h4 h5 30.Qe6 Rg7 31.Qf6 Rd7 32.e4 b4 33.axb4 Qxb4 34.f3 Qd6 35.Qxd6 Rxd6 36.Ra1 Kg7 37.e5 Rb6

May-17-19		cormier: click for larger view Analysis by Houdini 4 d 19 dpa done 1. + / = (0.38): 9...Re8 10.cxd5 exd5 11.a3 d4 12.Be2 Qb6 13.Na4 Qa5+ 14.Kf1 Be7 15.Nxd4 Nxd4 16.Rxd4 Be6 17.Qc3 Qf5 18.Qd3 Qxd3 19.Rxd3 Nd5 20.Be5 Rac8 21.Nc3 Nxc3 22.Rxc3 f6 23.Bd4 2. + / = (0.39): 9...Qb6 10.Be2 d4 11.exd4 Nxd4 12.Nxd4 Bxd4 13.0-0 Bd7 14.Qd2 e5 15.Be3 Bxe3 16.Qxe3 Qxe3 17.fxe3 Rad8 18.b3 Rfe8 19.Bf3 e4 20.Be2 Be6 21.h3 a6 22.Kf2

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