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Up Topic Rybka Support & Discussion / Rybka Discussion / Leiden round 3: Pro Deo - Rybka
- - By Jeroen (*****) [nl] Date 2012-05-13 05:40
[Event "Blitz:50'"]
[Site "Leiden ICT 2012"]
[Date "2012.05.12"]
[Round "3"]
[White "Pro Deo"]
[Black "Rybka Cluster 100 Cores"]
[Result "0-1"]
[ECO "B90"]
[PlyCount "116"]
[EventDate "2012.05.12"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3
Be7 9. Qd2 Nbd7 10. g4 O-O 11. O-O-O b5 12. g5 Nh5 13. Nd5 Bxd5 14. exd5 Qc7
15. Kb1 Nb6 16. Na5 Nxd5 17. Qxd5 Qxa5 18. Bd3 Rac8 19. Rhg1 g6 20. c3 Qc7 21.
Be4 Rb8 22. Rge1 b4 23. cxb4 Rxb4 24. Rc1 Qb8 25. Rc2 Ng7 26. Qa5 Ne6 27. Qxa6
Nc5 28. Bxc5 dxc5 29. h4 Rd8 30. Qe2 Rbd4 31. Rec1 Qb6 32. Qf1 c4 33. Ka1 Rb8
34. Qe2 Bb4 35. h5 Rbd8 36. hxg6 hxg6 37. Qh2 c3 38. Qxe5 Rd1 39. a3 Qa6 40.
Rxc3 Bxc3 41. Qxc3 Qf1 42. Rb1 Rxb1+ 43. Bxb1 Rd1 44. Qc8+ Kg7 45. Qc3+ Kh7 46.
Qc2 Re1 47. Ka2 Qxf3 48. Qd2 Re3 49. Qh2+ Kg7 50. Qd6 Qg4 51. Qf6+ Kg8 52. Qd8+
Kh7 53. Bxg6+ fxg6 54. Qc7+ Kg8 55. Qd8+ Kf7 56. Qf6+ Ke8 57. Qc6+ Qd7 58.
Qxg6+ Qf7+ 0-1
Parent - - By Labyrinth (****) [us] Date 2012-05-13 06:42
16. Na5?! seemed unnecessary, thoughts?
Parent - - By Jeroen (*****) [nl] Date 2012-05-13 07:08
16. Na5 is a normal book move and the most popular move at this point. White gets good compensation for the pawn. Check any modern openingbook.
Parent - - By Labyrinth (****) [us] Date 2012-05-13 08:19
How much of this game was book?
Parent - - By Jeroen (*****) [nl] Date 2012-05-13 08:23
Probably 22. Rge1 was the first new move, perhaps Nelson can look it up in his database?
Parent - By Nelson Hernandez (Silver) [us] Date 2012-05-13 11:21
22.Rge1 is in book but not 22...b4.
Parent - By Eelco de Groot (***) Date 2012-05-13 09:27 Edited 2012-05-13 09:56
I have 22.Reg1 still in the Vesely book, and the only reply to that was 22...a5 so 22...b4 would be new but this being the Najdorf maybe there already are several thousand games with this move... But I commend Pro Deo with staying in book against Rybka that long!

At depth 22, these are the three best moves I see in this position

1r3rk1/2q1bp1p/p2p2p1/1p1Qp1Pn/4B3/2P1BP2/PP5P/1K1R2R1 w - -


Engine: Rainbow Serpent 2.2.4 Build 055 (256 MB)
by Tord Romstad, Marco Costalba and Joona

22     10:38  -0.12++  22.Rg2 Qc8 23.h4 Qe6 24.Qd2 a5
                       25.Bd5 Qh3 26.Rh2 Qf5+ 27.Qc2 Qxc2+
                       28.Rxc2 (1.209.665.982) 1893

21     10:38  -0.20    22.Rd2 Rfc8 23.a3 a5 24.h4 Bf8
                       25.Ka1 b4 26.cxb4 axb4 27.axb4 Rxb4
                       28.Qc5 dxc5 29.Bxc5 Bxc5 30.Bxg6 (1.209.665.982) 1893

21     10:38  -0.44    22.Bc2 a5 23.Be4 a4 24.a3 Qc4 25.h4 Rbc8
                       26.f4 Qxd5 27.Bxd5 exf4 28.Bd4 Ng7
                       29.Rde1 Nf5 30.Rg4 h6 31.Rxf4 hxg5 (1.209.665.982) 1893

_____________________________________________________________

22     14:31  -0.05    22.Rg2 Rfc8 23.h4 Bf8 24.Rc2 Ng3
                       25.b3 Kh8 26.a4 Nxe4 (1.629.989.434) 1870

22     14:31  -0.28    22.Rd2 Rfc8 23.a3 a5 24.h4 Bf8 (1.629.989.434) 1870

22     14:31  -0.36    22.h4 b4 23.cxb4 Rxb4 24.Rc1 Qd7
                       25.Bd2 Rb5 26.Qxf7+ Rxf7 27.Bc6 Qxc6
                       28.Rgd1 Qxc1+ 29.Bxc1 (1.629.989.434) 1870

Eelco
Parent - By Nelson Hernandez (Silver) [us] Date 2012-05-13 11:33
Pro Deo's opening play was brilliant until move 18.  Then the move to play was 19.c4.  Black is in a 22.4% position with 33.4% draws, which can continue 19...Rb8 20.h4 or 19...Qd8 20.cxb5 axb5 21.h4 both of which put in black in the 82-84% success realm.
Parent - By Nelson Hernandez (Silver) [us] Date 2012-05-13 11:19
Na5 is played over 80% of the time in this position and is by far the best move statistically with 68.9% success.
Up Topic Rybka Support & Discussion / Rybka Discussion / Leiden round 3: Pro Deo - Rybka

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