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Hydra (Computer) vs Ruslan Ponomariov
Man vs Machine 120'/40+60' (2004), Bilbao Esp, rd 4, Oct-09
Sicilian Defense: Scheveningen. Classical Variation (B84)  ·  1-0



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Kibitzer's Corner
Oct-31-04  fgh: 23. ... Bxd4 is a terrible blunder
Mar-26-05  Gowe: why 23.Bxd4 is a TERRIBLE blunder, if you can explain it, it would be great. And please show me a continuation that win, or something definitive, because i can't see anything.
Mar-26-05  psmith: How does white continue after 23... Nxb2?
May-26-05  DanRoss53: 23... Bxd4 looks good to me. After 23... Nxb2 24. e5 dxe5 25. fxe6 fxe6 26. Qe4 g6 27. Rxf6 Qxf6 28. Rf3 Qg7 29. Nxe6 Bc6 30. Nd5 white has a won game.
May-28-05  Dionyseus: <DanRoss53>Actually, your suggestion of 27...Qxf6 is weak. Black should instead play Nxd3, forcing white to recapture with the rook, which would allow the black queen to safely take the rook on F6, threatening mate. White is then forced to stop the threat with Rf3. At least a draw is guaranteed with 29...Qg7 30.Nxe6 Bc5 31.Nd5 Bxd5 32.Qxd5 Qe7 33.Qxe5+ Kg8 34.Qd5 Kh8 35.Qe5+ Kg8 36.Qd5 Kh8 37.Qe5+ draw by repitition.

But <fgh> is incorrect, 23...Bxd4 is not a blunder.

So where did Ponomariov blunder then? Well I think he blundered with 35...bxc4, which allowed for white to move his queen to F1 overwhelming black's defenses. He should have played 35...Bf7, so that if white moves his queen to F1, black simply exchanges bishops and then checks with Qe4+, with at least a guaranteed draw.

Jun-21-05  csmath: Here is the beating Ponomariov got, just to make Adams feel a little better. ;-))

Ponomariov played opening much better than Adams today. Hydra shows propensity for tactical games here and for some reason Pono was into it. Well, he got beaten quite fast after 30. ... b5?! It shows you that if you want to play tactical game against a machine then you better make no inaccuracies.

Jun-25-05  fgh: <Dionyseus>: 23. ... Bxd4 is a blunder, I will stay behind that opinion and defend it. The fact, that you are rated below 1400 on but you are acting like you are better than Kramnik, that you have some extremely extensive knowledge about chess and that you can analyse better than grandmasters only shows how shaky yours arguments are.
Jun-25-05  Anastasia: but he can beet u @ kickboxing 4 sure
Jun-25-05  fgh: How do you know that? Have you met him in person? Do you think the guy in his avatar is him?
Jun-25-05  aw1988: Moreover, what relation does kickboxing have to chess?
Jun-25-05  fgh: <aw1988>: It comes from a quote:

"Of course, the computer beated me at chess, but it was no match for me at kickboxing!" ---- Unknown

Jun-25-05  aw1988: Beated?
Jun-25-05  Montreal1666: <fgh:> The avatar is his own picture. He is my friend. Be carefull.
Nov-07-05  sharpnova: <fgh> you said you would defend it.. please.. explain how 23. ... Bxd4 is a blunder. I am not able to see how it is nor can I really understand why your only defense is to bash someone for having a low rating.
Jul-04-06  spirit: blunder no blunder pono beaten period!
Jul-04-06  psmith: Nobody ever answered my question from a year and three months ago. What about 23...Nxb2? I think White continues with 24. e4!? but this is unclear to me. Any analysis?
Jul-04-06  psmith: That should have been: white continues with 24. e5!? unclear.
Jul-04-06  spirit: <psmith> me wanted to answer that earlier but sincerely me aint see no immediate novelty for whyte, but there must be...u see these machines are terrible with strategy,me believe them without question! with 24.e5 we hope to get compensation from pressuring the kingside with the whyte Bishop and rook,but this is still unclear and me aint got no software to check.can crafty help us out?
Jul-07-06  psmith: On analyzing with Fritz 5.32 I have become convinced that 23...Nxb2 24. e5! is a win for White in all variations. I think it is quite remarkable really. I suggest checking it out with a more advanced engine.
Jul-10-06  spirit: <psmith> it took us over a year to see that...pono saw it almost immediately.We need to respect anyone that goes with the title GRANDMASTER!
Jul-11-06  psmith: <spirit> Here is some analysis of 23...Nxb2 24. e5! (Based largely on Fritz 5.32)

(a) 24... dxe5 25. fxe6
(a1) 25... h6 26. Nd5 Qf8 27. e7 Bxe7 28. Qxe5
(a2) 25... fxe6 26. Rxh7+ Kg8 27. Ne4 Kxh7 28. Nxf6+ Kh8 29. Qe3 Bh5 30. Qg5 gxf6 31. Qxh5+ Kg8 32. Rf3 (a3) 25... Nxd3 26. Qxd3 h6 27. Nd5
(b) 24... Rxc3 25. exf6 Qxf6 26. fxe6 Qxd4 27. Rxh7+ Kg8 28. Rh8+! Kxh8 29. Qh5+ Kg8 30. exf7+ (c) 24...Nxd3 25. exf6 Qxf6 26. Qxd3
(d) 24...h6 25. exf6 Qxf6 26. fxe6 Qxd4 27. exf7 Bd7 28. Qe7 Rf8 29. Qxd7 Qxc3 30. Rxh6+! gxh6 31. Qe6 Qg7 32. Rf6

White wins in all lines!

Jul-12-06  spirit: thanks <psmith>
May-25-09  tibone: Hübner says that( already 21..Kh8 was the mistake (not 23..Bxd4, because 23..Nxb2 wouldn´t be better as is shown above) because it´s pointless. The king isn´t safer on this square than on g8 as the variations with rxh7+ (after 23..nxb2) are showing. Better would have been the immediate Nc4 with the continuation 22.Bxc4 Rxc4
23.Nde2 Be5 and Black is better.
May-25-09  tibone: after 21.. Nc4 both 22. Qe2 and 22. Qf2 wouldn´t work out really.

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