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Gyula Sax vs Nigel Short
Subotica Interzonal (1987), Subotica YUG, rd 4, Jun-??
Spanish Game: Closed Variations. Flohr System (C92)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Oct-01-05
Premium Chessgames Member
  TheAlchemist: Short mentioned this game in his round 3 report from San Luis:

<Anand-Adams has exploded into extraordinary violence. The Zaitsev Variation is not a regular feature of the Englishman’s repertoire (he tends to prefer other systems of the Spanish), but clearly he had prepared something particular for the tournament favourite, excavating a line that was popular from the Kasparov-Karpov clashes back in the 1980s. It also jogged long-dormant painful memories of a game that I lost brilliantly to Gyula Sax in the Subotica Interzonal. Black’s kingside is jolly weak indeed.>

http://www.chessbase.com/newsdetail...

Jan-25-09  zev22407: A great attacking game by sax
Jan-30-14
Premium Chessgames Member
  Nigel Short: The worst thing was that I saw he was threatening Qxh6+, but I thought 37...Qd2 defended against it.
Mar-03-14
Premium Chessgames Member
  Domdaniel: <Nigel> Yes, it's painful to think you've seen something, only to miss an obvious nuance. But it's possibly worse to be totally bewildered. Sax's piece sac 20.Nxc4 is very impressive.
Jul-15-15  Xonatron: Nigel, why did you think 37...Qd2 defended against it?
Jul-15-15  Xonatron: Nigel, in your book you mention, "Months of analysis and more practical tests have thus far failed to establish the soundness of Sax's knight sacrifice. I did not believe it at the time but after errors by both sides in time pressure Sax finished the game rather nicely."

I popped the position into Stockfish 6 (4096 MB hash + 8 cores), and it eventually sees the knight sacrifice as the best move.

...

Does not see it by depth 28. Notice the draw (0.00) evaluation:

28/41 00:23 184,379k 7,852k 0.00 bxa6 Rxa6 Nf5 Rxa3 bxa3 Nbd3 Bxd3 Nxd3 Re3 Qc5 Nxc4 Nxf2 Kxf2 Qxc4 Nxh6+ gxh6 Qg4+ Kh7 Qf5+ Kg8 Qg4+

First sees it at depth 29. Notice still close to draw (0.06):

29/41+ 00:36 287,587k 7,794k +0.06 Nxc4

Still at depth 29, it sees it as a distinct advantage (0.56):

29/48+ 01:07 535,811k 7,942k +0.56 Nxc4

Stopped at depth 34, the evaluation seems to stick (0.69):

34/56+ 08:11 3,748,930k 7,621k +0.69 Nxc4

...

(Note to chess engine connoisseurs that the move is detected immediately if the hash tables are already filled from previous moves. When you start the engine on this move, freshly, it takes much longer.)

Jul-15-15  Xonatron: Depth 40, and the evaluation is still climbing (0.87):

40/58+ 40:17 17,525,184k 7,250k +0.87 Nxc4

Jul-14-17  Chesstorian72: Nigel you're garbage that's why you lost you're an embarrassment to Chess!! Leave immediately!!
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