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- - By Vasik Rajlich (Silver) Date 2007-07-04 20:48 Edited 2007-07-16 09:28
Rybka vs GM Jaan Ehlvest II - Everything but a Pawn

** This post will be kept up-to-date during the match with all relevant information


Terms and comments by Larry Kaufman
More comments by Larry Kaufman
Predictions by Rybka forum members
Comments by Vasik Rajlich
Summary of Rybka vs Ehlvest I - Match at Pawn Odds

Conclusions & Analysis

Post-match comments by Larry Kaufman
Report on Chessvibes by Arne Moll


Game 1: Ehlvest-Rybka 0-1 [39]
Game 2: Ehlvest-Rybka 1/2-1/2 [43]
Game 3: Ehlvest-Rybka 0-1 [57]
Game 4: Ehlvest-Rybka 0-1 [27]
Game 5: Ehlvest-Rybka 1/2-1/2 [44]
Game 6: Ehlvest-Rybka 1/2-1/2 [44]

Game Summaries by Vasik Rajlich

Game 1, Ehlvest - Rybka 0-1: Throughout the game, Ehlvest played boldly, from a sharp opening choice (7. d5 !? instead of the normal 7. Ng3), to an interesting and sound positional pawn sacrifice 18. Rc2, to the surprising yet precise blows 29. Qxh4 and 32. e5. On the verge of a brilliant game, he finally lost the thread in a wild double-edged endgame where his 2 kingside connected passed pawns battled Rybka's 3 queenside connected passed pawns. Later analysis showed that with precise play starting with 33. Re2 white could have obtained a huge and maybe decisive advantage.

Game 2, Ehlvest - Rybka 1/2-1/2: Rybka could never flex her muscles in this game. One move out of her book in an offbeat queen-pawn opening, Rybka failed to find the equalizing 4. .. Nb4! and landed in a solid but passive position where she could only sit and wait for white to dictate the action. Ehlvest took his time, exchanging a pair of knights and the light-squared bishops and fixing the pawns on both wings. In the final position, he had his choice of several plans which promised hope of a modest advantage (40. b4, 40. Nc5, and perhaps even 40. Rxc6), but decided that the risks outweighed the rewards and settled for a draw by repetition.

Game 3, Ehlvest - Rybka 0-1: The opening was more than fine for black and after a strong dynamic pawn sacrifice, white's position was on a slippery slope. Ehlvest found safety in a pawn-down queen and rook endgame where black's extra queenside pawn was difficult to advance. Ehlvest played accurately for a while but then two inaccuracies (32. h4?! and 35. a5?!) left him in a lost rook endgame. Rybka, playing without tablebases, overestimated a drawn king+rook vs king+pawn position in her search and blundered into tricky but drawn territory with 39. .. Kb4?. In time pressure, Ehlvest could not find the study-like draw and returned the favor with 50. Rh7?, after which he got no second chance. More analysis can be found here.

Game 4, Ehlvest - Rybka 0-1: Rybka equalized without much trouble and began to put pressure on white's d-pawn. Ehlvest reacted ambitiously with 14. Nb5 a6 15. Bxc7, giving up a bishop and knight for rook and pawn while ripping open the cover around black's king. In his post-game comments, he felt that white's chances should not be worse, but black's pieces were well-placed and there didn't seem to be much that white could do. With white's position eroding, Ehlvest gambled on the unsound sacrifice 21. d5 to complicate matters, but Rybka was able to consolidate.

Game 5, Ehlvest - Rybka 1/2-1/2: Rybka again managed to equalize without much difficulty in a slightly offbeat queen pawn opening. However, in this type of isolated queen pawn structure, it can be difficult for black to preserve realistic winning chances, and Rybka was unable to do it. 18. Ng4 was an interesting and accurate move - after 18. .. Nxg4 19. hxg4, white threatens 20. Bxe7 and there isn't a really convenient way for black to deal with it. Rybka played 19. .. f6, but then after 20. Bh6 there were all sorts of g4-g5 ideas in the air. 20. .. e6 would have been one way to defend, since 21. Bxg7 Kxg7 22. g5 fxg5 23. Re5 h6 24. Rde1 is merely unclear. Rybka chose the simplest approach, 20. .. Bxh6 21. Qxh6 e6, but then after 22. g5 fxg5 23. Re5 it is already hard to imagine the game ending in something other than a draw. The rest of the pieces were methodically traded and neither side could make progress in the resulting rook ending.

Game 6, Ehlvest - Rybka 1/2-1/2: A nice solid positional game from Ehlvest to conclude the match. Rybka responded to the offbeat 4. Rb1 in the Scandinavian by playing 4. .. e6, locking in her queen bishop. This piece would remain on c8 for the next 30 moves. It's not clear how black should go about freeing her position - perhaps 22. .. Bxc3, giving white pressure along the b-file, should be avoided. Black sought counterplay on the kingside and obtained a passed pawn there, but white's queenside pressure gradually paid dividents and on move 34 black finally admitted that white stood better with the bizarre-looking but seemingly accurate 34. .. Bd7. White's advantage turned out to be of a nominal nature and a draw was soon agreed.

Parent - - By SillyFunction (**) Date 2007-07-05 00:30
This kind of handicap is much better than the previous one!
Parent - By Gaмßito (****) Date 2007-07-05 06:15
It is just a bit harder challenge for Rybka. But, a pity that won't be to 8 games like the previous one. Although, it will be very interesting, without any doubt.  
Thanks to all Rybka team for this.

Parent - - By miso Date 2007-07-05 10:46
Could someone please post the games on the forum for those of us who don't have access to the Convekta's server (firewalls, etc...)
Parent - By Victor Zakharov (*****) Date 2007-07-05 14:04
Ok, we will post the game here. As well we should think about on-line web translation
Parent - - By Victor Zakharov (*****) Date 2007-07-05 14:03 Edited 2007-07-05 14:08
Online broadcast of the games from the match Rybka – Jaan Ehlvest at ChessOK Playing Zone.

Unstructions :

1) To watch games you should download
and install the program. The icon Chess Assistant Club will appear on your Desktop. Click it.
2) Register or enter as a quest.
3) You can find games by the following methods:
a) After starting the program the link for the games Rybka – Ehlvest will appear in the Console window.
b) Enter the section Playing Room and find the game Rybka – Ehlvest (or Ehlvest – Rybka). Click “Follow”.

Additional info you will be able to find on site.
Parent - - By -valdimor- (**) Date 2007-07-05 14:17
when i want to follow a game i get this error

"access violation at adress 00682351 in module chessplanet.exe .Read of adress 00000004"
Parent - - By Victor Zakharov (*****) Date 2007-07-05 14:39
Please specify what did you do more exactly. As well some details like your login can be useful. Did the program offer you to send error report?
Parent - By -valdimor- (**) Date 2007-07-05 14:57
never mind the problem is solved now
Parent - - By Jim Walker (***) Date 2007-07-05 16:50
I get an error every time I start up.  I can't find any way to notify people at the web site so here it is:

CLProfile.formCreate (000000)
The parameter is incorrect

Happens every time I start but after that it still seems to work.  I'm running Win98.

Parent - By Victor Zakharov (*****) Date 2007-07-05 17:40
Thanks for this note. I am not able to comment what is the reason. One of the Win98 problems can be lack of GDI resources. But if program works, it seems that another problem has place. I will answer tomorrow about this problem.
Parent - - By miso Date 2007-07-05 15:08
Can we also have the game posted on the forum please. It is impossible to install neither use Chess Assistant Club on a corporate network.
Parent - - By Victor Zakharov (*****) Date 2007-07-05 15:30
Parent - By Hetman (*****) Date 2007-07-05 17:50
that,s great :-).
Parent - - By Victor Zakharov (*****) Date 2007-07-05 17:50 Edited 2007-07-05 18:03
Flash version of Chess Planet.

Using this link you can try to view games using Flash version of ChessPlanet. May be somebody will find Flash version even better to use.

The link is

1) Click Enter (may you will need clicking it 2 times)
2) In a new window click Guest Login (if nothing happens click it once more)
3) in the Games window click Refresh to get list of games
4) Click White column to sort games by names of White player
5) *Ehlvest - *Rybka game will be the first in the list (when it will be created by Larry Kaufman)
6) Double click on it to open

Guests can't talk. So you need to register to be able to ask or write something.
Parent - - By Fulcrum2000 (****) Date 2007-07-05 17:57
This seems to work fine (Firefox Thanks!
Parent - - By M ANSARI (*****) Date 2007-07-05 19:27
I tried installing the software and registering.  Apparentely the OK button never gets black and so you cannot register.  Also why so many silly questions for registering ????  This should be a game server not application for Immigration.  Even when you fill out everything it still will not accept.
Parent - By Fulcrum2000 (****) Date 2007-07-05 19:34
Just use the flash player and log in as guest, no questions asked!.
Parent - - By turbojuice1122 (Gold) Date 2007-07-05 22:11
Is there a .pgn view of the game anywhere?  I'm out of town and on a dial-up connection with a computer that has trouble trying to load any sort of plug-ins.
Parent - By Gr00vy (**) Date 2007-07-05 20:20
Ok this must be a secret trick to try and give the programmers enough publicity so that they will be forced to change the incredible UI they have written.

What is it about chess programmers and UI.  They really ought to expand past the 6.95 bargain bin, and the Delphi example page to get a lesson on UI design.

Parent - By exigentsky (***) Date 2007-07-05 19:35 Edited 2007-07-05 19:39
The ChessOK software has no Mac version, so I am unable to view the match. Although, I wouldn't have installed the ChessOK software even if it did have a Mac version because I know I won't use it for anything other than to view the match. A web-based broadcast would be much better. This was the case for all major GM tournaments and it should be the same here. It is friendlier, faster and compatible with any platform (unless some idiot uses the insecure garbage which is ActiveX).

Oh good, there's a Flash version. But, I can't find the game. Is it over?
Parent - - By Michael Hart (***) Date 2007-07-05 19:49

Just wondering how to configure the tablebase directories through Chess Assistant Club and every other engine parameter.  I am sure there is a way but I must be overlooking it.  Thanks for your time and patience.
Parent - - By M ANSARI (*****) Date 2007-07-05 20:09
I figured out how to register ... in the birth date year you have to put 19XX and not only XX.  Apparently that is enough to make the "OK" button stay grey.
Parent - - By lkaufman (*****) Date 2007-07-05 21:24
I'm online now as LarryK, waiting for instructions on how to broadcast.
Parent - - By diskamyl (**) Date 2007-07-05 21:28
has the game begun?
Parent - By Fulcrum2000 (****) Date 2007-07-05 21:34
Yes, look for the game Ehlvest - Rybka !
Parent - - By Gr00vy (**) Date 2007-07-05 21:47

It is not on the flash list.  And is it a flash bug where the game list has a difference between capitalized players and uncapitalized players when sorting by name???  Really?  
Parent - By Gr00vy (**) Date 2007-07-05 21:49
Ok I refreshed the games list which was blank and I found it.   But did a dice cup really roll when I got to the game?   Is this Backgammon Software?  Is that the reason for all the funky wood?
Parent - By Victor Zakharov (*****) Date 2007-07-05 21:02
SRrint, sorry, Chess Assistant Club was not initialy considered as analysis software. And there is no way to setup engine details. New version that will be released soon will have Personalities box.
Parent - - By Sesse (****) Date 2007-07-06 13:58
The time zone in the original post is slightly off -- 10am EST is indeed 4pm CET, but we're in summer time now, so CEST is the relevant time zone. 10am EST is 5pm CEST.

/* Steinar */
Parent - By Sesse (****) Date 2007-07-06 14:13
...but the match started at 4pm CEST, it seems. So perhaps it's the EST time that should be adjusted?

/* Steinar */
Parent - By George Tsavdaris (****) Date 2007-07-06 15:21 Edited 2007-07-06 15:24

>The time zone in the original post is slightly off -- 10am EST is indeed 4pm CET, but we're in summer time now, so CEST is the relevant time zone. >10am EST is 5pm CEST.

10 am EST is 4 pm CEST(now in the summer for north hemisphere).

Because actually this EST is a wrong expression too, since in summer time, it's called EDT. (Eastern daylight time)

To clear things up:

EST(Eastern Standard Time) = UTC -5   When NON-DAYLIGHT SAVING time is used.
CET(Central European Time) = UTC +1  When NON-DAYLIGHT SAVING time is used.

EDT(Eastern Daylight Time) = UTC -4   When DAYLIGHT SAVING time is used.
CEST(Central European Summer Time) = UTC +2  When DAYLIGHT SAVING time is used.

So the difference between CET and EST is always 6 hours. Summer or winter.....
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