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Up Topic Rybka Support & Discussion / Rybka Discussion / Brilliant Game by Rybka 3 mp
- - By Maitra (**) Date 2008-08-08 12:56
Hi All- I saw a game on the server with Rybka 3 as White, Hiarcs 12 mp Black. I give this game here for all of you to see. Do give your comments on this game.

[Event "5m + 0s, rated"]
[White "Phil Harris Rybka 3"]
[Black  "Nitrogen HIARCS 12 MP"]
[Result "1-0"]
[ECO "C07"]

1. e4 {B/0 0} e6 {B/0 0} 2. d4 {B/0 0} d5 {B/0 0} 3. Nd2 {B/0 0} c5 {B/0 0} 4.
Ngf3 {B/0 0} Nc6 {B/0 0} 5. Bb5 {B/0 0} a6 {B/0 0} 6. Bxc6+ {B/0 0} bxc6 {B/0 0
} 7. O-O {B/0 0} cxd4 {B/0 0} 8. Nxd4 {B/0 0} Bb7 {B/0 0} 9. Qe2 {0.11/13 5}
Nf6 {(Qb6) -0.07/11 9} 10. exd5 {-0.03/13 7} cxd5 {-0.15/12 9} 11. N2f3 {
0.00/16 0} Qc7 {(Ne4) -0.40/11 7} 12. g3 {-0.02/15 7} Be7 {(Ne4) -0.48/12 14}
13. Bf4 {0.15/14 8} Qb6 {-0.45/12 0} 14. a4 {0.07/15 8} O-O {-0.44/12 0} 15. c3
{0.08/15 8} a5 {(Nh5) -0.46/12 13} 16. Qb5 {0.13/13 2} Qa7 {(Bc5) -0.48/12 4}
17. Rfe1 {0.11/14 3} Ne4 {-0.45/12 7} 18. Ne5 {0.04/15 0} Bc5 {-0.46/11 9} 19.
Rad1 {-0.17/14 2} h6 {(Rfc8) -0.35/11 12} 20. Qb3 {-0.05/12 6} Rfc8 {
(Bxd4) -0.23/11 13} 21. Nxf7 {0.00/14 18} Kxf7 {0.00/12 19} 22. Rxe4 {
0.20/15 15} dxe4 {0.00/12 0} 23. Nxe6 {1.02/12 17} Bxf2+ {0.49/12 45} 24. Kg2 {
1.19/14 0} e3+ {0.48/11 6} 25. Kh3 {1.06/15 23} Kg8 {(Bg2+) 1.24/11 0} 26.
Nxg7+ {3.91/10 7} Bd5 {2.98/12 28} (26... Kxg7 27. Rd7+ Kh8 28. Be5#) 27. Rxd5
{4.71/15 0} Qf7 {3.00/12 13} 28. Nf5 {4.91/16 0} Ra6 {4.47/11 25} 29. Nxh6+ {
4.88/17 0} Rxh6+ {3.78/10 1} 30. Bxh6 {5.08/17 23} Qe6+ {(Kh7) 5.07/12 0} 31.
g4 {5.46/13 8} Re8 {5.07/13 0} 32. Qb7 {5.40/12 2} Re7 {(Qxh6+) 5.05/12 0} 33.
Rg5+ {5.54/11 2} Kh8 {6.46/13 9} 34. Qf3 {5.54/12 10} Qxh6+ {5.10/11 2} 35. Rh5
{5.96/10 3} Qxh5+ {5.57/12 0} 36. gxh5 {6.13/12 1} Kg8 {7.09/14 13} 37. Qd5+ {
6.58/13 0} Kf8 {(Rf7) 7.09/12 1} 38. Kg2 {6.46/9 2} Bh4 {7.28/11 4} 39. h6 {
Nitrogen,HIARCS 12 MP resigns  (Lag: Av=0.30s, max=0.6s) 7.21/13 0} 1-0

Now check out the following position from the game:

r1r3k1/qb3pp1/4p2p/p1bpN3/P2NnB2/1QP3P1/1P3P1P/3RR1K1 w - - 0 21


Other engines like Fritz slightly favour Black in this posiiton. Here Rybka 3 played the stunning 21.Nxf7!! and was giving the positional eval as a draw but I thought White must be winning esp with a powerful knight on d4 and Queen on b3 directly aimed at the Black king giving White superb attacking resources. Other engines might see this but obviously Rybka saw this move in 18 seconds!

r1r3k1/qb3Np1/4p2p/p1bp4/P2NnB2/1QP3P1/1P3P1P/3RR1K1 b - - 0 21


and now Rybka 3 finishes off Black with the powerful hammer blow 26.Nxg7+ !! after which Black's kingside just gets destroyed. Please note that my comments are like a big chess enthusiast and not like a strong player analysing this game so I might be wrong too.

(If 26...Kxg7? 27.Rd7+ Kh8 and Be5 mate. )

r1r3k1/qb4N1/7p/p7/P4B2/1QP1p1PK/1P3b1P/3R4 b - - 0 26
Parent - - By TedSummers (***) Date 2008-08-08 14:39
Yes, Rybka 3 finds the Sac very quickly. Here is output from IDeA (Nxf7 +1.07) running on a Core2Duo Laptop.

Parent - - By Zherkovv (***) Date 2008-08-08 16:52
On my old P4 3.0 GHz
222: Phil Harris Rybka 3 - Nitrogen HIARCS 12 MP, 21.Pxf7 !!!    26.Pxg7 !!!
r1r3k1/qb3pp1/4p2p/p1bpN3/P2NnB2/1QP3P1/1P3P1P/3RR1K1 w - - 0 1


Analysis by Toga II 3.1.2SE:

21.Ra1
  =/+  (-0.64)   Depth: 1/7   00:00:00
21.Rd3
  =/+  (-0.50)   Depth: 1/11   00:00:00
21.Qb5
  =  (-0.04)   Depth: 1/11   00:00:00
21.Qb5 Rf8
  =  (0.00)   Depth: 2/11   00:00:00
21.Qb5 Ba6 22.Qxa5
  =  (-0.14)   Depth: 3/16   00:00:00
21.f3 Nf6 22.Qb5
  =  (0.09)   Depth: 3/16   00:00:00
21.f3 Nd6 22.g4 Ba6
  =  (-0.01)   Depth: 4/16   00:00:00
21.f3 Nd6 22.Nd7 Bxd4+ 23.cxd4 Nf5 24.Nc5
  =  (-0.14)   Depth: 5/16   00:00:00
21.f3 Nd6 22.Nd7 Ba6 23.Nxc5 Qxc5 24.Kh1
  =  (-0.09)   Depth: 6/16   00:00:00  19kN
21.f3 Nf6 22.Qb5 Qa6 23.Be3 Bd6 24.Bf4
  =  (0.00)   Depth: 7/17   00:00:00  53kN
21.f3 Nf6 22.Qb5 Bd6 23.Qd3 Ba6 24.Qc2 Rab8
  =  (0.01)   Depth: 8/21   00:00:00  107kN
21.f3 Nf6 22.Kg2 Qa6 23.Kg1 Bd6 24.Ng6 Bc5 25.Ne5
  =  (0.00)   Depth: 9/22   00:00:00  246kN
21.f3 Nd6 22.Nd7 Bxd4+ 23.cxd4 Nc4 24.Nc5 Bc6 25.Rc1 Qe7 26.Rc2 Ra7
  =  (0.07)   Depth: 10/31   00:00:01  702kN
21.f3 Nd6 22.Nd7 Bxd4+ 23.cxd4 Bc6 24.Nc5 Nf5 25.Qa3 g5 26.Be5 h5 27.Rc1
  =  (-0.15)   Depth: 11/41   00:00:02  1162kN
21.Nxf7 Kxf7 22.Rxe4 dxe4 23.Qxe6+ Kf8 24.Nf5 Rd8 25.Bd6+ Bxd6 26.Rxd6 Bc6 27.Rxd8+ Rxd8 28.Qxc6 Rd2 29.Qc8+ Kf7 30.Nd4 Rxb2 31.Qe6+ Kf8 32.Qxe4 Kg8
  =  (0.00)   Depth: 11/54   00:00:33  14809kN

(,  08.08.2008)
Parent - - By Maitra (**) Date 2008-08-09 07:32
Yes I think Fritz finds 21.Nxf7!! given sufficient time. This move doesn't look like a computer move at all. Its as if a super GM is playing with White having a Kasparovian style of play. Can anyone post any other engine analysis please for ex Hiarcs,Zappa etc. Thx
Parent - By Zherkovv (***) Date 2008-08-09 08:48
Only "Rybka 3"  and "Toga II 3.1.2SE"  can find 21.Nxf7! (under 60 sec.) on my old PC (P4 - 3.0 GHz)
under 60 sec. !!!
All the other engines like;Rybka 2.3.2a mp,Deep Hiarcs 12, Zappa, Fritz11,10,9,8,7,Deep Shredder11,10,9,8, Chess Tiger, Junior 10  and many, many others
don't see it in a acceptable time!!!
Parent - - By SillyFunction (**) Date 2008-08-09 08:08
I'm a sac mania, too.
In my opinion, the most talented engine is the one which makes every victory with a stunning sac.
It implies that the engine sees what the others can't see.
Parent - By Maitra (**) Date 2008-08-09 16:26
Yes this looks a very natural move but difficult to play unless you have calculated all the complicated variations which arise after this move is played out.
Up Topic Rybka Support & Discussion / Rybka Discussion / Brilliant Game by Rybka 3 mp

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