WCCC - Rybka v Hiarcs Round 8

[Eelco de Groot]

According to Lukas, the miracle man of the 40 clusters,
the win over Hiarcs is mainly due to Jeroen, the
book author.

Paulo Soares

Isn't that Nonsense?
According to the game score Rybka was out of book at move 8.

[Event "WCCC 2008 R8"]
[Site "?"]
[Date "2008.10.04"]
[Round "?"]
[White "Rybka"]
[Black "Hiarcs"]
[Result "*"]
[PlyCount "35"]
[EventDate "2008.??.??"]
[TimeControl "50/5700:10/1020:1200"]

{256MB, Hiarcs A.ctg, HARVEYWILLID19E} 1. e4 {0} c5 {B/0 0} 2. Nf3 {11} Nc6 {
B/0 0} 3. d4 {9} cxd4 {B/0 0} 4. Nxd4 {7} e5 {B/0 0} 5. Nb5 {8} d6 {B/0 0} 6.
N1c3 {8} a6 {B/0 0} 7. Na3 {8} Rb8 {B/0 1} 8. Nc4 {389}

I don´t know, because in the Rybka 3 book , by Jeroen,
there are two moves, 8. Nd5 and 8 Bd3. Why Jeroen did not use
8. Nd5, considered the best? The war of openings, at this level,
it´s complex, maybe Jeroen knew that 8. Nc4 would be played by Rybka,
and the opening was very good for Rybka.
I already saw this strategy being used on Playchess

Paulo Soares

I guess 7...Rb8?! is a playchess machine room invention. There is not a single human game in the databases. After 8.Nc4?! Black has a chance to get back into known theory by transposition with 8...Be6.
The move 8...Nf6? was refuted convincingly in the game, I think.

Naum does not see any better move than 8... Nf6, in 5 best moves mode to 22 plies. Maybe the critical point is later?


[d]1rbqkbnr/1p3ppp/p1np4/4p3/2N1P3/2N5/PPP2PPP/R1BQKB1R b KQk -

Engine: Naum 3.1 (256 MB)
by Aleksandar Naumov

19 20:15 -0.17 8...Nf6 9.Bd3 Bg4 10.f3 Be6 11.Ne3 Be7
12.O-O Qb6 13.Rf2 Qc5 14.Na4 Qa7
15.c4 O-O 16.Nc3 Nd4 17.Nf5 b5 (972.816.983) 800

19 25:32 -0.33 8...b5 9.Ne3 Nf6 10.Bd3 Nb4 11.O-O Be7
12.Be2 Be6 13.a3 Nc6 14.Bd3 O-O
15.Ncd5 Qd7 16.Bd2 Bxd5 17.Nxd5 Nxd5 (1.224.653.722) 799

19 27:15 -0.44 8...Be7 9.Nd5 Be6 10.c3 h6 11.Be3 b5
12.Nxe7 Kxe7 13.Nd2 Nf6 14.Be2 Qc7
15.O-O Rhd8 16.a4 bxa4 17.Qxa4 Rxb2 (1.312.695.700) 802

19 23:57 -0.46 8...Be6 9.Nd5 Nf6 10.Bg5 Bxd5
11.exd5 Ne7 12.Bxf6 gxf6 13.a4 Qc7
14.a5 Bg7 15.Qf3 O-O 16.O-O-O f5
17.Qa3 Rbd8 (1.152.350.610) 801

19 29:09 -0.48 8...h6 9.Nd5 b5 10.Nce3 Nf6 11.Bd3 Be7
12.O-O O-O 13.a4 b4 14.a5 Nd4 15.f3 Nxd5
16.Nxd5 Bh4 17.Bd2 Bb7 (1.406.930.735) 804

.
.
.
___________________________________________________

21 73:20 -0.17 8...Nf6 9.Bd3 Bg4 10.f3 Be6 11.Ne3 d5
12.exd5 Bxd5 13.Bxa6 bxa6 14.Nexd5 Bb4
15.O-O Bxc3 16.Nxc3 Qb6+ 17.Rf2 Rd8
18.Qe2 O-O (3.586.787.471) 815

21 76:42 -0.33 8...b5 9.Ne3 Nf6 10.Bd3 Nb4 11.O-O Be7
12.a4 bxa4 13.Rxa4 Bd7 14.Ra1 O-O
15.Bc4 Qb6 16.Qe2 Rfc8 17.Rd1 h6
18.h3 Qc6 (3.746.944.079) 814

21 85:49 -0.40 8...Be6 9.Nd5 Nf6 10.Bg5 Bxd5
11.exd5 Ne7 12.Bxf6 gxf6 13.a4 Qc7
14.c3 Rd8 15.Qf3 Bg7 16.Be2 Qc5
17.Rd1 b5 18.axb5 axb5 (4.214.534.743) 818

21 97:41 -0.48 8...Be7 9.Nd5 Be6 10.c3 b5 11.Nxe7 Kxe7
12.Ne3 Nf6 13.Nd5+ Kd7 14.Nxf6+ Qxf6
15.Bd3 h5 16.O-O h4 17.h3 Qg6 18.Qf3 Bc4 (4.801.597.381) 819

21 105:18 -0.56 8...h6 9.Nd5 b5 10.Nce3 Nf6 11.Bd3 Be7
12.O-O O-O 13.a4 b4 14.a5 Be6
15.Nxf6+ Bxf6 16.Bxa6 b3 17.c3 Ra8
18.Bb5 Rxa5 (5.182.259.566) 820

_____________________________________________________

22 201:44 -0.21 8...Nf6 9.Ne3 Be7 10.Bd3 O-O 11.O-O Nb4
12.Be2 Be6 13.a3 Nc6 14.Bd3 h6
15.Ncd5 Nd7 16.Nxe7+ Nxe7 17.b4 Nc6
18.Bb2 Nf6 19.Qf3 (9.946.483.135) 821

22 209:39 -0.36 8...b5 9.Ne3 Nf6 10.Bd3 Nb4 11.O-O Be7
12.a4 bxa4 13.Rxa4 Bd7 14.Ra1 O-O
15.Bc4 Qb6 16.Qe2 Qc6 17.f3 Qc5
18.Rf2 Rfc8 19.Bxa6 (10.340.689.752) 822

22 223:10 -0.42 8...Be6 9.Nd5 Nf6 10.Bg5 Bxd5
11.exd5 Ne7 12.Bxf6 gxf6 13.a4 Qc7
14.c3 Bg7 15.Be2 O-O 16.O-O Qc5
17.Qd2 Rfe8 18.Rfd1 Nf5 19.b4 (11.057.900.814) 825

22 264:23 -0.52 8...f5 9.Ne3 fxe4 10.Nxe4 Nf6 11.Bd3 Be7
12.O-O O-O 13.c3 g6 14.Nxf6+ Bxf6
15.Qb3+ Kh8 16.Be4 Bd7 17.f3 Bg5
18.Rd1 Qc7 19.Nd5 (13.100.129.813) 825

22 280:56 -0.52 8...Be7 9.Nd5 Be6 10.c3 b5 11.Nxe7 Kxe7
12.Ne3 Nf6 13.Nd5+ Kd7 14.Nxf6+ Qxf6
15.Bd3 h5 16.O-O h4 17.h3 Qg6 18.Qf3 Bc4
19.Bd2 (13.977.425.050) 829

_____________________________________________________

22 201:44 -0.21 8...Nf6 9.Ne3 Be7 10.Bd3 O-O 11.O-O Nb4
12.Be2 Be6 13.a3 Nc6 14.Bd3 h6
15.Ncd5 Nd7 16.Nxe7+ Nxe7 17.b4 Nc6
18.Bb2 Nf6 19.Qf3 (9.946.483.135) 821

22 209:39 -0.36 8...b5 9.Ne3 Nf6 10.Bd3 Nb4 11.O-O Be7
12.a4 bxa4 13.Rxa4 Bd7 14.Ra1 O-O
15.Bc4 Qb6 16.Qe2 Qc6 17.f3 Qc5
18.Rf2 Rfc8 19.Bxa6 (10.340.689.752) 822

22 223:10 -0.42 8...Be6 9.Nd5 Nf6 10.Bg5 Bxd5
11.exd5 Ne7 12.Bxf6 gxf6 13.a4 Qc7
14.c3 Bg7 15.Be2 O-O 16.O-O Qc5
17.Qd2 Rfe8 18.Rfd1 Nf5 19.b4 (11.057.900.814) 825

22 326:41 -0.48 8...g6 9.Nd5 b5 10.Nce3 Bg7 11.a4 Nge7
12.Nxe7 Qxe7 13.Nd5 Qh4 14.Bd3 Bg4
15.Qd2 O-O 16.O-O Nd4 17.axb5 axb5
18.f3 Be6 19.Qg5 (16.343.267.635) 833

22 264:23 -0.52 8...f5 9.Ne3 fxe4 10.Nxe4 Nf6 11.Bd3 Be7
12.O-O O-O 13.c3 g6 14.Nxf6+ Bxf6
15.Qb3+ Kh8 16.Be4 Bd7 17.f3 Bg5
18.Rd1 Qc7 19.Nd5 (13.100.129.813) 825

best move: Ng8-f6 time: 351:50.469 min n/s: 825.800 nodes: 17.023.333.358

Eelco

[nepossiver]

Team Rybka strategy was too go out of book as soon as possible, as they reasoned this would benefit the stronger engine. For that, they choose off-beat lines which probably wouldn't be covered by other teams books. In the game against Hiarcs, Hiarcs was on the book for longer, but left it soon anyway, and in difficult position.

Somewhere in this (http://rybkaforum.net/cgi-bin/rybkaforu ... l?tid=7738) thread Noomen's comments can be found.