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Up Topic Rybka Support & Discussion / Rybka Discussion / 2009 ACCA Pan Am CCC - Opening report
- - By Jiri Dufek (**) [cz] Date 2009-11-16 09:34
For this tournament i decided use latest cluster book based on 1.e4 for white for testing our openings here.
Report from this tournament follows:

1) RC-amyan

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Be6 10. d4 exd4

[D]
r2q1rk1/2p1bppp/p1npbn2/1p6/3pP3/1BP2N1P/PP3PP1/RNBQR1K1 w - -


Not every sideline is checked in the book, after 10..exd4 is transposition to 10..Bxb3 but Amyan chose weaker 12..Re8 after which
white is simply clearly better thanks to c7 pawn and weak white squares. After breaktrought on c-file game was nearly over.

[D]
rq2r1k1/2R2ppp/p1Qp2n1/1p1P1N2/1P1Nn3/7P/1P3PP1/3R2K1 w - -

29.Ne6

2) Amateur-RC

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Qb6 6. c3 Qc7 7. c4!? (it's very interesting move, because directly transpose to

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Qc7 6. Nc3 Nf6 7. Bd3

) 7..Nf6 8. Nc3 Nc6 9. Nxc6 dxc6 (last book move)

[D]
r1b1kb1r/1pq2ppp/p1p1pn2/8/2P1P3/2NB4/PP3PPP/R1BQK2R w KQkq -


I have little doubts about 10.Bg5 with 11.Bxf6 follows but there is not so much other sources for this line. Position was roughly balanced but
lately Rybka grabs initiative (and pawn :-) ) and after weaker moves from Amateur Rybka won games in nice endgame

3) RC-Crafty

I must say without any doubts, there are lot of space for my work in the opening, but..
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 (surprise for me, Crafy very often plays Chigorin defence) 6. Bb3 Bb7 7. c3 Nxe4 8. d4
exd4 9. Re1 d5 10. Ng5 and here ended book. It can be little soon, but Rybka played next moves very well.

[D]
2kr1b1r/1bp2qp1/p6p/np1p4/3PP3/1B6/PP4PP/RNBQR1K1 w - -


10.. Qd7 11. f3 h6 12. Nxf7 Qxf7 13. fxe4 O-O-O 14. cxd4 Na5
Up this moment both engines followed (?!) Kangur-Ikegami corr 2002.

[D]
2kr1b1r/1bp2qp1/p6p/1p1p4/3PP3/1QN5/PP4PP/R1B1R1K1 b - -


White has advantage and lately got winning position. However as was mentioned, later Rybka's bug  allows Crafty save draw.

4) NowX-RC

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 h6 8.
Bh4 Bb7 9. e3 (somewhere white was out of book) 9..d6 10. Nf3 (10.f3!) 10..Nbd7 11. Bd3 c5 (last book move)

[D]
r2q1rk1/pb1n1pp1/1p1ppn1p/2p5/2PP3B/P1QBPN2/1P3PPP/R3K2R w KQ -


We have nearly typical Nimzo-indian position but i simply dontlike combination Bd3/Nf3/Bh4 together where Nf3 not suits very well for me.

NowX started play little weird moves (13.Nd2, 14.Qxd4) and Rybka fastly grab initiative which lately convert to extra pawn. Rybka played lately nice but simple exchange sacrifice

[D]
4r1k1/pb1B1pp1/7p/q2n4/2rB1P2/P1pQ4/6PP/R4RK1 b - -


27..Rxd4!

and white position colapsed very soon.

5) RC-ArasanX
1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. dxe5 Be7 6. O-O O-O (last black book move) 7. c4 Nc6  8.
Bc2 Be6 9. Qe2 Nc5 10. Rd1 d4 11. Nc3 Bg4 12. Nd5 (last book move)

[D]
r2q1rk1/ppp1bppp/2n5/2nNP3/2Pp2b1/5N2/PPB1QPPP/R1BR2K1 b - -


After 12.Nd5 arise very interesting position. Black will destroy white king side, but white mobile double-f pawn, open g-file, 2 strong bishops are much important factor than 3 pawns islands and just only optically weak king.
Black d4 need too be defended (which is little problematic, this is nearly possible only by knights from c6 and e6) and black has no siple way to counterplay at all. For a long time (up to move 25, but with moves 25..Re8/26...Rg8/27..Re8 you can be only much worse) Arasan thougt that is little betterbut then score very fast fell down during few moves.
Final attack started with 28.f5

[D]
3qr2k/2p2pbp/r1n1n1p1/p2NPP2/2PpB3/BP4QP/5P2/R5RK b - -


6) Gaviota-RC

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 c5 6. d5 (6.a3 is "normal") O-O (last book move)7. a3 Ba5 8. g3 (last book move)

[D]
rnbq1rk1/p2p1ppp/1p2pn2/b1pP4/2P5/P1N1P1P1/1P2NP1P/R1BQKB1R b KQ -


Position is very complex. 11..Bxc3 was "novelty" (11..Re8 Sokolov-Romanishin and Lozano Diaz-Munoz Moreno) after which position was equal. After declining repetetion with 16.h4 Gaviota makes position suicide with 17.0-0-0

[D]
r4rk1/p2nqpp1/bp1p1n1p/2pP4/5N1P/P1B1P1P1/1PQ2PB1/2KR3R b - -


after which was game nearly over.

After tournament i think that Rybka got after opening what she wanted and i can be nearly 100% happy with this tournament.
Attachment: 1.aqs (101k)
Attachment: 2.aqs (110k)
Attachment: 3.aqs (107k)
Attachment: 4.aqs (105k)
Attachment: 5.aqs (101k)
Attachment: 6.aqs (106k)
Parent - By Venator (Silver) [nl] Date 2009-11-16 19:57
Thanks for the report, Jiri! And well done!
Parent - - By Highendman (****) Date 2009-11-16 20:02
cool report - thanks.
And those mini analysis boards in your post are super cool :)
Parent - By Felix Kling (Gold) [de] Date 2009-11-16 20:06
And those mini analysis boards in your post are super cool

thanks ;)
Parent - By irulats (****) [ie] Date 2009-11-16 20:22
Congratulations and thank you for the games and analyses.
Parent - By Vasik Rajlich (Silver) [pl] Date 2009-11-17 19:35
Nice job Jiri with the preparations and congrats on your 3rd tournament win. :)

A big thanks also to Lukas for running Rybka on his cluster.

Vas
- - By jdart [us] Date 2009-11-16 19:29
5. .. Be7 6. O-O O-O in the Arasan game has very bad statistics in Chessbase Megabase. Probably better for Black to avoid this whole line with .. Nc5. I'm impressed how deep Rybka's book is in this relatively rare sideline.
Parent - - By Nelson Hernandez (Gold) [us] Date 2009-11-17 12:49
The statistics aren't good, but they aren't very bad either.  I've got white with 58% at that point.  Statistically the position really goes south after 8.Bc2, which is 83%.  I looked at only engine games in this line and it turned out a surprising proportion of the games that got into this position were from several years ago, with very weak (compared to today) engines.  This is a clue that the line was something from an old, now-obsolete book.  I then looked at human games in this position, and while there have been a flurry of them in recent years it appears the root game was Schiffers-Alapin, 1889.  It makes sense, then: originally books used human games, and in the early days of computer chess they got into sometimes-strange human positions.  That is what happened in this throwback game: an antique book met a cutting-edge book and it was no contest.
Parent - - By Dark Horse (***) [in] Date 2009-11-22 11:38
interesting lines, a lot to study, how were those mini boards done ? would they work only here at the Rybka forum ?
Parent - By Rowlando (***) Date 2009-11-25 06:43

> interesting lines, a lot to study, how were those mini boards done ? would they work only here at the Rybka forum ?


They're Aquarium i-books.  You can export i-books to a number of different formats (RTF, html for blogs etc) but the Rybka forum is the only place I know of where you can attach i-books to a message and have them appear inline automatically.
Up Topic Rybka Support & Discussion / Rybka Discussion / 2009 ACCA Pan Am CCC - Opening report

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