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Up Topic Rybka Support & Discussion / Rybka Discussion / Leiden 2010 - opening report
- - By Jiri Dufek (**) Date 2010-11-29 07:12
Leiden 2010
After successfull WCCC I prepared book for Leiden. I used book which was very close to book from WCCC (which is based on Rybka 4 book) but improved playing few hundreds testing games. After exchanging emails with Jeroen and Nick I decided to prepare some new lines for black mainly in closed openings like English defence and Reti.

1)  Rybka-Hansdarf
I decided to play Ruy Lopez with quick d3, which is not so popular now and very often both sides are out of book very early. Rybka was out of book after 8..Bg4. I was not so happy with 9.Be3 (9.c3) but Rybka found own way how to handle position and got strong pressure on queenside which lately converted to win.

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. O-O d6 8. a4
r2qk2r/2p1bppp/p1np1n2/1p2p3/P3P1b1/1B1P1N2/1PP2PPP/RNBQ1RK1 w kq - 0 9

9. Be3

2)  Spike-Rybka
It’s very hard for me write something new about this game, because Rybka won third time in this line (Junior, Hector). This line is very complicated and if white is not enough active, then he will lost pretty easy. White position looked long time good, but after move 30..b4 white position quickly colapsed

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Qd7 5. a3 Bxc3+ 6. bxc3 b6 7. Qg4 f5 8. Qg3
Ba6 9. Bxa6 Nxa6 10. Ne2 Kf7 11. a4 Ne7
r6r/p1pqnkpp/np2p3/3pPp2/P2P4/2P3Q1/2P1NPPP/R1B1K2R w KQ - 0 12

3)  Rybka-Hiarcs
Hiarcs team was very good prepared for our game. I predicted another Najdorf, but Hiarcs team chose Russian defence, where he had prepared interesting line. Rybka was out of book after 8..c6 (with +0,38). As was mentioned in the forum, we followed Eros corr game and Rybka made new move 17.Nb3 which gave little plus, however black should equalize in long run. Lately Hiarcs played daring 18..f6 which I don’t like (problem with king safety) and allowed to Rybka improve her position move by move. Very good positional game played by Rybka and very good opening preparation by Hiarcs!

1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. dxe5 Nc5 6. Be2 Be7 7. O-O O-O 8.
Be3 c6

rnbq1rk1/ppp1bppp/8/2npP3/8/4BN2/PPP1BPPP/RN1Q1RK1 b - - 0 8

4)  Jonny-Rybka
Very interesting game between two clusters.7…e6 has very bad reputation after Petrosian-Botvinnik game, but it was analysed in one recent book. Rybka was out of book after 10…a5. After this move Jonny totally lost thread and played some mysterious moves (11.Be3, 12.Ra2, 13.Ng5).

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. c4 O-O 6. O-O d6 7. Nc3 e6 8. Qc2
Nc6 9. Rd1 Qe7 10. a3 a5

r1b2rk1/1pp1q1bp/2nppnp1/p4p2/2PP4/P1N2NP1/1PQ1PPBP/R1BR2K1 w - - 0 11

After few moves Rybka played 15…a4 and Jonny took this pawn, which allowed Rybka strong attack on the kingside.

r4rk1/1np1q1bp/1p1ppnp1/5pN1/p1PP4/P1N1B1PP/RPQ1PP2/3R2K1 w - - 0 16

5)  Rybka-Sjeng
It was very awaited game from me. Sjeng chose sideline in catalan and we were both very early out of book. Sjeng played little cautions 10..Bxf6 which allowed white slight plus, but its hard imagine that this position should be forced way lost for black

1.  d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c6 5. Bg2 Nbd7 6. O-O Bd6 7. Nc3
r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b kq - 0 7

However after more less forced moves we reached position after 21.Qd1 ..

2rq1rk1/5ppp/b3p3/p1n5/3N4/6P1/P3PPBP/2RQR1K1 b - - 0 21

..where black had some problems, which ended loss of pawn and clearly worse endgame.

6)  Spark-Rybka
It’s hard to be happy after game, where was draw inevitable. Spark played very solidly and didn’t give Rybka any space for creative play. Rybka was out of book after 14.a4. After this move both sides exchanged nearly everything and draw was accepted very quickly.

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2 b5 8.
Nxc6 Qxc6 9. O-O Bb7 10. Bf3 Qc7 11. e5 Rc8 12. Bxb7 Qxb7 13. Qd3 Ne7 14. a4

2r1kb1r/1q1pnppp/p3p3/1p2P3/P7/2NQB3/1PP2PPP/R4RK1 b k - 0 14

Congratulation to Spark team and their preparation! Very good and safe play!

7)  Rybka-Shredder
I awaited what surprise Sandro prepared this time, because games against Shredder are everytime very interesting and Sandro have very creative opening preparation. However this time was Sandro unlucky, because I analysed Pirc defence really deeply and found that black have lot of problems after simple 9.a4! (+0,60 out of book) which is mentioned in Rybka 4 book (today I checked DB and found that it was played by Shirov and Bologan). After this move is very problematic for black got enough counterplay, because after logical e7-e6 which was played in the game is pawn structure very bad for black!

1. d4 d6 2. e4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8.
d5 O-O 9. a4

r2q1rk1/pp1nppbp/3p1np1/2pP4/P3PP2/2N2N2/1PP3PP/R1BQK2R b KQ - 0 9

Position after 26.g4 showed domination white pieces on the board

3r3k/1p1n1r1p/p1q1p1pb/P1p1Pn2/2PpNPP1/1P1Q1N2/3B3P/R4RK1 b - - 0 26

8)  The King-Rybka
Very good game played by The King. Rybka was out of book after 4.b3. After few moves we were back in Dutch defence, however Rybka played 6..Bd7 which looked too artificially. Long time King played very well and maybe even got some advantage, but then played weaker 22.Bf3?! (22.N1xf3), but even after this mistake white position was only slightly worse. Terrible blunder was only 34.Nxc6? after which white was lost.

1. Nf3 f5 2. g3 Nf6 3. Bg2 g6 4. b3

rnbqkb1r/ppppp2p/5np1/5p2/8/1P3NP1/P1PPPPBP/RNBQK2R b KQkq - 0 4

9)  Rybka-Scaramanga
I never heard about this engine which plyed very good in Leiden. Scaramanga chose not very often played line of Ruy Lopez but he got very good position from opening. In the next few moves Rybka played slightly unusual moves to backrank (12.Bc1, 18.Nb1) but even these moves improved white position. After 19.Bxf4 Rybka took initiative and went to win.

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6 7. O-O Bg7 8. Re1 b5
9. Bb3 Nf6 10. Bg5 O-O

r2q1rk1/2pb1pbp/p1np1np1/1p2p1B1/3PP3/1BP2N2/PP3PPP/RN1QR1K1 w - - 0 11

Conclusion: Leiden 2010 was pretty successful tournament. Lukas made lot of succesfull  work with his cluster, which play very strong. From opening point of view Rybka never got worse position from opening but got quickly advantage against Jonny and Shredder. In other games Rybka got very pleasant position with slight push (Sjeng, Hiarcs, Spike) and in remaing games playable position. We were little bit lucky, because we had white pieces against strong opponents (Hiarcs, Sjeng, Shredder).
Parent - By Vasik Rajlich (Silver) Date 2010-11-29 07:14
Thanks for your preparation and report, Jiří. :smile:

Parent - - By M ANSARI (*****) Date 2010-11-29 07:51
Yes good job Jiri and nice preparation as usual.  Although Rybka played top engines as white it also played 7 of the 9 opponents who made it to second place.  It is nice to see how the cluster has been improving and even nicer to see that some of the parameters available to the cluster are filtering to the Rybka 4.1 version.
Parent - - By Carl Bicknell (*****) Date 2010-11-29 08:35

> It is nice to see how the cluster has been improving and even nicer to see that some of the parameters available to the cluster are filtering to the Rybka 4.1 version.

They are? You have news on this? I thought 4.1 was like the pot of gold at the end of the rainbow - it's actually coming??

Parent - - By Lukas Cimiotti (Bronze) Date 2010-11-29 10:31
They are. And he does not only have news, but he also has the first beta of Rybka 4.1 as he's helping us testing :smile:
Parent - By Carl Bicknell (*****) Date 2010-11-29 10:53
*leaps for joy*

I don't suppose there is any news on Rental Rybka or FPGA Rybka?
Parent - By Rubén Cómes (****) Date 2010-11-29 11:31
Congrat and thank you very much Jiri.
Parent - - By Venator (Silver) Date 2010-11-29 16:27
Nice job, Jiri! Openings went very well and such a game against Spark: well, that can happen :-).

The cluster was awesome in Leiden, I can't remember a program winning the title 2.5 points ahead of number 2 after 9 rounds....
Parent - By Maxou93 (**) Date 2010-11-29 22:42
+1, such a margin in a very tough contest !!
Congratulations Jiri and good news to see that 4.1 is not only a subject of complain but a true operating version.
And the cluster is definitely a mighty beast.
Thanks to all the team
Parent - By NATIONAL12 (Gold) Date 2010-11-30 01:20
it takes a lot to impress me but the lads did it this time,congrats to all involved.
Parent - - By sarciness (***) Date 2010-11-30 01:17
Well done Jiri and the Rybka team!

Out of interest, what do you think the final score would have been were Rybka playing only on a single quad-core machine?
Parent - - By Jiri Dufek (**) Date 2010-11-30 20:35
It is question for our opponents :-) I think that with quad Rybka could scored somewhere around 7-7,5 points
Parent - By sarciness (***) Date 2010-12-01 13:55
Thanks for your response- 7 to 7.5 would still be a fine result! Your opening book and Rybka make a great team. The cluster, however, is a monster!
Parent - By dr_zied_haddad (**) Date 2010-12-01 10:36
Hi Rybka team
Hi Jiri
It seems that things gone well concerning opening book this time. During the last tournament, the fact that the book wasn't loaded well seems also to work well, 'cause the opponents preparation was blown away. This wtrategy could only work if after the opening the position is good enough, and there are possibilities to complicate the play, which Rybka is currently the best engine to do well.
260 cores! impressive, not as impressive as the 500 cores of jonny. When will we see 1000 cores?

Hope development plans of rybka is underway.

Again, the rybka team is the most professional and successful. Still a few years and The record of shredder as the most successful engine in computer chess championships will be broken.
Up Topic Rybka Support & Discussion / Rybka Discussion / Leiden 2010 - opening report

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