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Daniele Vocaturo vs Illya Nyzhnyk
Tata Steel Group C (2011), Wijk aan Zee NED, rd 13, Jan-30
Sicilian Defense: Najdorf Variation. English Attack (B90)  ·  1/2-1/2
ANALYSIS [x]

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Kibitzer's Corner
Jan-30-11  goodevans: Unfortunately Nyzhnyk will remember this as the game that cost him the tournament.

In the last round, needing a win to overtake Vocaturo and win a place in next year's Tata B he had victory in his grasp but let it slip.

32 ... Kxg6 33 Qe4+ Kh6 34 Nf7+ Kg7 35 Nxd8 Nf6 is winning for black. After White's N drops, his multitude of pawns are not sufficient compensation for his piece deficit. I would not expect him to play on much longer.

Jan-30-11
Premium Chessgames Member
  luzhin: Nyzhnyk could have won game and tournament by being prepared to give up his Q with 32...Kxg6! After 33.Qe4+ Kh6! 34.Nf7+ Kg7 35.Nxd8 Rexd8 36.Qg4+ Kf6 37.Qh4+ Kf7 38.Qh5+ Ke7 39.Qh4+ Kf6 40.Qxb4+ Kf7 Black's army is more than a match for White's Queen and pawns. BUT Vocaturo had a way of making his drawing idea sound, by playing 28.Ra4!! Bxa4 29.Rg3 Bc6 30.Bxg6 Bxd5 31.Qh5 Bg7 32.Qh7+ Kf8 33.Bxf7! Bxf7 34.Qxg7+ Ke7 35.Rf3 Rf8 36.Qg5+ Ke6 37.Qf5+ Ke7 38.Qg5+ and perpetual: the point is to make Black spend an extra move to get his Bishop back to capture the White Knight on d5, which he must do to avoid White's most dangerous threats.
Jan-30-11  Kazzak: @luzhin

Don't you think 40.Qxb4 in your variation above is somewhat wasteful, seen from white's POV?

Jan-30-11
Premium Chessgames Member
  Penguincw: <goodevans> Maybe Nyzhnyk will also get an invitation to Group B.Coming in first guarantees an invitation to the next group,however there's still a possibility for Nyzhnyk to be in Group B next year.
Jan-31-11
Premium Chessgames Member
  Eyal: This game gives the impression of having two almost completely separate parts. In the first part, up to move 25, White plays a nice positional game with the establishment of control over d5 as a main motif. But then, after 26.Rb4?! Bc6 the rook suddenly gets into trouble, and it looks like when realizing the game got out of control, Vocaturo started looking for tactical solutions, finding the 27.Bxh5 idea (already available a move earlier, in fact). As <luzhin> already pointed out, this should have allowed a draw after the accurate 28.Ra4! but should have led to a loss with accurate play by Black after 28.Rg3?

In addition to 32...Kxg6, Black could have been winning a move earlier with 31...Bg7 (instead of Kf7) - e.g., 32.Qg4 Re7 33.Nxd6 Nf8. Regarding the perpetual pattern at the end, it may be noted that the diagonal check 36.Qh7+! is absolutely necessary; other "obvious" moves fail - 36.Qh5+? allows Black to bring in the queen with 36...Qg5, and 36.g4+? Ke4 allows the black king to escape via e5 or c6 after 37.Qe3+ Kxd5.

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