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Up Topic Rybka Support & Discussion / Rybka Discussion / 2009 World Computer Rapid Chess Championship-opening report
- - By Jiri Dufek (**) Date 2009-08-16 20:10 Edited 2009-08-16 21:23
I was very pleased when Vasik offers me prepare book for The 2009 Third Annual World Computer Rapid Chess Championships.

I worked on the book about 5-7 hours/day during 3 weeks which was very short time.

Preparing book for Rybka for this tournament mean following steps:
- choose format: I used Aquarium format for book – for very simple and fast editing and adding new moves
- choose source games: I use slow engine games and correspondence games from the last 2 years, which are played nearly with 100% assistance with computer engine
- choose opening repertoire: I choose solid but active repertoire, often involved not very explored openings, because there is room for strength of cluster
- I used my personal analysis (which I made over last 10 years) lot of them newly checked with Rybka 3, I deeply analysed over 70  important positions current theory and included this analysis to book too
- I “consulted” my knowledge and sources with over 15 chess books (mainly from Chess-stars but there are others too)
- I handy checked about 5000 slow playchess games from the last 18 months relevant for choosed opening repertoire and adjusted opening book-
setting priorities and then testing
- I played about 1500 games on playchess during testing period, after this games I made changes in the book
book is about 600MB big

And now follow report
In the first round was opponent not very known engine Deuterium.
Against Najdorf I prepared 6.h3 variation which was used with success in the previous tournaments. I found new interesting ideas in this line. In this game last book move was 11.Qe2

rn1qk2r/1b1nbppp/p2pp3/1p6/3NP1P1/P1N1B2P/1PP1QPB1/R3K2R b KQkq -

after which Deuterium started about move 22  play weird moves and got lost position quickly.

Is well known engine by Robert Hyatt. This time Crafty's book was simple not enough and Rybka got probably nearly winning position after 28...Re8
2k1r3/6pp/p3n3/2b2B2/PpP5/4p3/6PP/R4R1K w - -

with score about +1,3 for Rybka. Next 9 moves was played instantly because of ponder hit. At the end of game Rybka remain with more time on the clock than she had on the start of game.

Is next well known engine by Gian-Carlo Pascutto and bookmaker. Last book move was 8.Bd2 but Erdo have big experience with this type of position on Playchess.
rn1qk2r/pbp1bppp/1p1pp3/8/2PPn3/2N2NP1/PP1BPPBP/R2Q1RK1 b kq -

Rybka got slight plus but Sjeng defended very well and game ended in a draw in 92 moves.

Is private engine by Munjong Kolss. In our game Ikarus little bit outcooked me with his 5.Bd3, but here I little prepare Queen gambit accepted, which was not specially prepared for black. Last book move in game was 17..Rc8
2rq1rk1/1b2bppp/pp2pn2/4N3/PnBP4/2N1B1Q1/1P3PPP/2RR2K1 w - -

Lately played Ikarus inacuratelly and allowed Rybka's sacrifice whole rook for strong attack which ended in winning endgame.
8/3q3k/2b3p1/1pP1pp1p/1P5b/3r1PP1/2RB1N1P/4Q1K1 b - -

44..Qd5 45.Nxd3 Qxf3

For this time, Hiarcs was another sacrifice of 6.h3 Najdorf. Last book move was 11.f4
rn1q1rk1/1b2bppp/p2ppn2/1p6/3NPPP1/P1N1B2P/1PP3B1/R2QK2R b KQ -

after which position suits more for Rybka as white than for Hiarcs as black. About move 23 was
r1r3k1/1b2bppp/pq1pp3/n1n3P1/3NPP1P/7R/NPP1Q1B1/1KBR4 w - -

23.h5 Rab8 24.g6

white attack on kingside more real than black counterplay on queenside and Hiarcs got lost position quickly.

Stockfish was nice surprise in the tournament. In our game Stockfish present one of the “drawish exchange variation” which are nearly in every opening. We were out of book after 8..Rc8
2rqkb1r/pp3ppp/2n1pn2/3p1b2/3P1B2/2N1PN2/PP3PPP/2RQKB1R w Kk -

when position is totally symetrical but after only 10 moves white was struggling in the worse position.
2r1kb1r/pp3p2/1q2p3/3p3p/2nP2p1/2N1P1P1/PPQ2PP1/2R2KNR w k -

After next 10 moves black was clearly better an Rybka won convincingly.

In this game Spark chose old line which liked Alekhine in his best years. QGA with a6 and Bg4 is not popular so much since Alekhine years. Rybka was out of book after 11.Bb2
r2q1rk1/1pp2ppp/p1nbpn2/7b/3P4/1PN1PN1P/PB2BPP1/R2Q1RK1 b - -

with little but stable advantage. Very soon Rybka got advantage 2 bishop vs 2 knights which was lately converted into better Fischer's-like ending R+B:R+N
r5k1/1p3p1p/p5n1/6p1/8/1P3BPP/P4P2/4R1K1 b - -

after 28.Rxe1

With excelent technics Rybka scored full point in 66 moves.

Without doubts not so much nice game. We both prepared same line which ended in a draw without many complications after few minutes. I was not happy after this game with my preparation and for the second day I removed french from reperoire.
Last book move in this game was 20..Rg6
6r1/1b1n1k2/p1p1p2P/1p3p2/5P2/2N5/PPP1R1P1/2K2B2 b - -

Start of second day cannot be better. Thinker chose weird line of Pirc defence and in spite of we both were out of book after 8..Ne8
r1bqnrk1/pp1nppbp/2pp2p1/4P3/3P1P2/2NB1N2/PPP3PP/R1BQ1RK1 w - -

after strong human-manouvre 9.Qe1 and 10.Qh4 black position very soon collapsed, because Thinker was not succesfull with breakthrough f7-f6 or c6-c5 (or better both).

Game with Pandix was very tunpleasant for us. White chose passive sideline of English which at the end leads to Najdorf with tempo-up for Pandix (last book move was 7..Be7)
r1bqk2r/ppp1bppp/1nn5/4p3/4P3/P2P1N2/1P2BPPP/RNBQK2R w KQkq -

Lately Rybka exchanges nearly every minor pieces and after 18.Rxc6
r2r2k1/1ppqbpp1/p1n4p/4p3/1P2P1b1/P2PBN2/1Q2BPPP/R1R4K w - -

score jump up for Rybka. However exchange on the c1 and transformation into queen endgame was not probably totally precise and game ended fairly in a draw. Congratulations Pandix for this game!

Under this nick was hide Scorpio from Ethiopea. After few seconds we were in the main line of Queen indian where I prepared exchange sacrifice for white, which very suits Rybka style.
Last book bove was 16.Bxb4
2rq1rk1/p2nbppp/b3p3/2Pp4/1B1P4/1P4P1/P2N1PBP/R2Q1RK1 b - -

after which white very good compensation for exchange. Scorpio played very well  but lately was not lucky with queens-triangel manouvre Qc7-b6-a7-c7
r2r2k1/2q3pp/2P2pn1/p2pp3/B2P4/1PB1QPP1/P6P/4R1K1 b - -

31...Qb6 32. Qf2 Qa7 33. h4 Qc7

and then black lost quickly.

In the last game we ended in the one of the main line Merano, which is pretty solid for black but very drawish too. Last book move was 16..Qc7
r4rk1/pbqnbppp/4p3/2P5/3Q4/B1P2N2/P3BPPP/R4RK1 w - -

After book Lemming started very long thinking and played not the best moves. After next few moves white position was worse and worse and in the  position on diagram
3r2k1/p1q2pp1/2b1pb1p/2Pr4/6Q1/R4NP1/P1R1BP1P/6K1 b - -

Rybka  started matting attack with 32..Rd1 and very soon scored full point.

In the last game Sjeng scored only draw and we are champions! :-)

Parent - - By Vasik Rajlich (Silver) Date 2009-08-16 20:25
Thanks Jiri, and congrats on the excellent preparation! I hope there will be more winner's reports from you in the future. :)

Parent - - By Nelson Hernandez (Gold) Date 2009-08-16 22:18
You seem to farm out your booking to a cast of characters.  What's up with that?  I thought Jeroen was your main man, especially considering his casual wear, which makes you look good in comparison!

Anyway well done, Jiri.  I like how you approach your part of the game: all you care about is what condition you were in when you exited book; after that it is up to the engine and you have either done or not done your job.  Exactly the same way I view the opening book!
Parent - - By Felix Kling (Gold) Date 2009-08-16 22:41 Edited 2009-08-16 22:44
Jeroen takes a brake, he's interested in stocks at the moment, as you can see from his posts at the flip side.

About the other comment: Well, who do you say looks good in comparison? ;)
Parent - - By Nelson Hernandez (Gold) Date 2009-08-16 23:08
Comparing you to Vas is like comparing a father to a son.  Personally I think you are fairly well turned out, but the question is what you will look like in 20 years: like Jeroen in Budapest or like Capablanca.

I am very familiar with Jeroen's thoughts on the global economy.  We correspond quite often and trade apocalyptic article links while energetically denouncing the Federal Reserve, fiat currency and various other hobgoblins.  We haven't talked about chess in over a year.  This is a bit curious, isn't it?  It seems we've both gone off the rails.
Parent - - By Felix Kling (Gold) Date 2009-08-16 23:22
No, I didn't mean it like this. I mean are you sure Jeroen makes Vas look good in comparison? ;)
Parent - - By Nelson Hernandez (Gold) Date 2009-08-16 23:46
I see your point, but those yellow shorts deserve a fashion red card.
Parent - By Felix Kling (Gold) Date 2009-08-17 00:04
compared to the white socks&sandals + the beard? I'm not sure :) I would call it a draw :)
Parent - By Venator (Silver) Date 2009-08-17 16:58
Ha ha ha, watch out! Next time I will wear a red Che Guevarra t-shirt in combination with these yellow shorts ;-)
Parent - By Lukas Cimiotti (Bronze) Date 2009-08-17 17:34
It's good that you didn't see me in full US tourist outfit ;)
Parent - - By Venator (Silver) Date 2009-08-17 16:53 Edited 2009-08-17 17:01
Indeed Nelson, who would have thought that we have the same view regarding the real criminals of modern society (Fed, bankers, politicians, Goldman amongst others)! They make a mess of it, use our tax money to bail themselves out and are going to eat our wealth by inflating the fiat currencies..... It is the biggest bank robbery of all time!

Still, we have some differences here and there. While Nelson's belief is that we are going to have deflation, I am not sure. If it is needed, the banks are going to give us helicopter money to keep consuming going ;-). On the other hand, the contraction in credit is so incredibly huge, that all money being printed might stay in the banking system. That is deflationary.... It is the key to what is going to happen to the world's economy, hence the most important question of all.

I don't think we are off the rails at all, we witness a crash that happens one time in a century. This is far more important than a game of chess!
Parent - - By Nelson Hernandez (Gold) Date 2009-08-17 18:17

> This is far more important than a game of chess!

I'm not so sure.
Parent - - By Dragon Mist (****) Date 2009-08-17 23:46
Me too. I find it far more important to set a verdict on Poissoned Pawn from you to. :-)
Parent - Date 2009-08-18 09:43
Parent - By titanium cranium (***) Date 2010-01-02 14:23
Can't blame Jeroen, as I suspect there's more money in stocks than openings. JMHO.
Parent - By Jiri Dufek (**) Date 2009-08-17 13:37
Thank you Nelson for your words.
Here is lot of space for improvements and i will prepare Rybka better for next tournament :-)
Parent - - By Felix Kling (Gold) Date 2009-08-16 22:04
Good job - although it could have been 3 draws less :) *kidding*

Nice that you used the Aquarium book format :) I guess you also used the book adapter for play. I remember a time when using a good opening book in that tournament was quite difficult and we played without opening book once if I remember right :)
Parent - By Jiri Dufek (**) Date 2009-08-17 13:13
Yes, we use Aquarium adapter which works fine for us without any problem.
Parent - By Lukas Cimiotti (Bronze) Date 2009-08-17 14:10
We use Aquarium book adapter for some very good reasons:
- it can be used for any chess server, I also use it on Playchess
- Victor wrote a special version for us - it is capable of setting affinities of Rybka's tasks. So I can put on Hyperthreading. On each physical core 1 Rybka task is running, idle logical cores are free for operating system, cluster connecting software and GUI. This raises overall performance by ~3% and makes the computer very responsive :)
- Aquarium book adapter can write log files - this can be helpful for debugging.
Parent - By yanquis1972 (****) Date 2009-08-16 22:41
thanks for the report. i liked the  Qe1-h4 maneuver in that thinker game as well, i meant to test that w/ rybka 3.

i have to say, if you came out ahead against erdo, you mustve done a pretty good job.  i noticed that rybka often seemed to play the french as black in the cluster games. i wondered if this was perhaps by design as an experiment, since rybka 3 at least natively prefers the french defense for black (god knows why). anyway, probably good to do away with it.
Parent - By Venator (Silver) Date 2009-08-17 15:17
Hi Jiri, congrats and welcome to the team!
Parent - By Kronicon (*) Date 2009-12-31 22:20 Edited 2009-12-31 22:24
I have a chanllenge to you. Can you accept play again my chess engine to proof you make a better book for Rybka. I am using my own costum chess engine I will defeat Rybka without using book and tablebase on my chess engine. Just only a friendly chess game. Can you send and email to [Deleted]
- - By wanted Date 2009-08-17 01:02
Parent - By Kronicon (*) Date 2009-12-31 22:21 Edited 2009-12-31 22:23
Hola amigo yo te puedo ayudar si me ayudas a mi te puedo decir donde conseguir el powerbook para Rybka. mi correo es [Deleted]
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