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Subject: Re: Rybka test position

Author: Ryan B.

Date: 21:34:02 12/11/05

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On December 12, 2005 at 00:20:44, K. Burcham wrote:

>
>How long does it take your program to play Qxe5 with + eval for black?
>Rybka played this move and won in short time control.
>Game below.
>
>2200 mhz Athlon
>764 pin
>
> [D] 2kr2nr/pp3pp1/2p1p2p/4N2q/2PPN1P1/3Q4/PP3P2/2KR4 b - - 0 1
>
>Rybka 1.0 Beta 32-bit:
>
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Nxf7
>  =  (0.12)   Depth: 9   00:00:00  20kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Nxf7 Rf8
>  =  (0.11)   Depth: 10   00:00:00  38kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Nxf7
>  =  (0.03)   Depth: 11   00:00:01  84kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Nxf7
>  =  (0.04)   Depth: 12   00:00:02  148kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Nxf7
>  =  (0.03)   Depth: 13   00:00:03  304kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Rf3
>  =  (-0.02)   Depth: 14   00:00:04  586kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Rf3
>  =  (0.00)   Depth: 15   00:00:06  1004kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Rf3
>  ³  (-0.40)   Depth: 16   00:00:13  2366kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.Rb3 Rb8 24.Nxf7
>  ³  (-0.66)   Depth: 17   00:00:27  5037kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.c5 Ng6 24.Re3
>  µ  (-0.73)   Depth: 18   00:00:57  10003kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.c5 Ng6 24.Re3
>  µ  (-0.71)   Depth: 19   00:01:31  16081kN
>19...Qxe5 20.dxe5 Rxd3 21.Rxd3 Ne7 22.Nd6+ Kc7 23.c5 Ng6 24.Re3
>  µ  (-0.71)   Depth: 20   00:02:47  27914kN
>
>
>[Event "8"/8"]
>[Black "Rybka 1.0 Beta 32-bit"]
>[Result "0-1"]
>[PlyCount "112"]
>
>1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5
>Bh7 9. Bd3 Bxd3 10. Qxd3 Qc7 11. Rh4 e6 12. Bf4 Bd6 13. Bxd6 Qxd6 14. Ne4 Qe7
>15. O-O-O O-O-O 16. c4 Ne5 17. Nxe5 Qxh4 18. g3 Qxh5 19. g4 Qxe5 20. dxe5 Rxd3
>21. Rxd3 Ne7 22. Rb3 Kc7 23. Nd6 Rb8 24. c5 Ng6 25. Re3 Ra8 26. Kd2 b6 27. b4
>Kd7 28. f4 Nxf4 29. Rf3 g5 30. Nxf7 b5 31. Nd6 a5 32. Ra3 a4 33. Rf3 Ke7 34.
>Rf2 Rf8 35. Rh2 Nd5 36. Rxh6 Rf2+ 37. Kd1 Rxa2 38. Rh7+ Kf8 39. Ne4 Ra1+ 40.
>Kd2 a3 41. Nxg5 a2 42. Nxe6+ Ke8 43. Ra7 Rg1 44. Ng7+ Kd8 45. Ne6+ Kc8 46. Nd4
>a1=Q 47. Rxa1 Rxa1 48. Nxc6 Rg1 49. Na7+ Kd7 50. Nxb5 Rxg4 51. Nd6 Nxb4 52. Ke3
>Ke6 53. Kf3 Rd4 54. Kg3 Kxe5 55. Nf7+ Kd5 56. Ng5 Rd1 0-1


FEN: 2kr2nr/pp3pp1/2p1p2p/4N2q/2PPN1P1/3Q4/PP3P2/2KR4 b - - 0 1

Gambit Fruit 1.0 Beta x:
  1/2	00:00	           4	0	-9.17	Qh5h1 Rd1xh1
  1/2	00:00	           6	0	+0.25	Qh5h2 Ne5xf7
  2/8	00:00	         286	0	+0.48	Qh5h2 Kc1b1
  3/11	00:00	         692	0	+0.49	Qh5h2 Kc1b1 Ng8f6 Ne5xf7
  4/11	00:00	       2.351	0	+0.68	Qh5h2 Kc1b1 f7f6 Ne5f7
  5/13	00:00	       9.878	0	+0.57	Qh5h2 Qd3f3 f7f5 g4xf5 e6xf5 Qf3xf5+ Kc8b8
  6/21-	00:00	      19.031	0	+0.13	Qh5h2 Qd3f3 f7f5 g4xf5 Ng8f6 f5xe6 Nf6xe4
Qf3xe4 Qh2xf2
  7/21	00:00	      36.581	0	+0.05	Qh5h2 Qd3f3 f7f5 g4xf5 Rd8xd4 Rd1xd4 Qh2xe5
Ne4d6+ Kc8b8
  8/23-	00:00	      86.793	0	-0.59	Qh5h2 Qd3f3 f7f5 g4xf5 Rd8xd4 Rd1xd4 Qh2xe5
Qf3e3 Kc8c7 f5xe6 Qe5xe6
  9/23	00:01	     172.513	0	-0.70	Qh5h2 Qd3f3 Qh2h4 Ne5xf7 Ng8f6 Nf7xh8 Rd8xh8
Ne4d6+ Kc8b8 Qf3b3 b7b6
  9/23+	00:02	     457.142	205.681	-0.19	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Ne4d6+
Kc8c7 Rd3b3 b7b6 Kc1b1
 10/29	00:02	     553.885	227.385	-0.19	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Ne4d6+
Kc8c7 Rd3b3 b7b6 Rb3a3 a7a5 Nd6xf7 Rh8f8
 11/29	00:03	     788.365	236.531	-0.14	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Rd3f3
Rh8f8 Ne4d6+ Kc8c7 Rf3xf7 Rf8xf7 Nd6xf7 c6c5 f2f4 Ne7c6 f4f5
 12/31	00:05	   1.211.561	235.525	-0.18	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Rd3f3
Rh8f8 Ne4d6+ Kc8c7 Rf3xf7 Rf8xf7 Nd6xf7 Ne7g6 Kc1d2 Kc7b6 Kd2e3 Kb6c5
 13/31	00:09	   2.402.760	257.873	-0.02	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Rd3f3
Rh8f8 Ne4d6+ Kc8c7 Nd6xf7 c6c5 Nf7g5 Rf8xf3 Ng5xf3 Ne7c6 Kc1d2 Nc6d4
 14/31	00:16	   4.224.386	261.949	-0.06	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Ne4d6+
Kc8c7 Rd3b3 b7b6 Rb3a3 a7a5 Nd6xf7 Rh8f8 Ra3f3 g7g6 Kc1c2 Ne7f5
 15/35	00:28	   7.434.722	260.616	-0.05	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Ne4d6+
Kc8c7 Rd3b3 b7b6 Rb3a3 a7a5 Nd6xf7 Rh8f8 Ra3f3 g7g6 Kc1d2 h6h5 g4xh5 g6xh5
 16/43	01:02	  16.265.161	261.372	+0.03	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Ne4d6+
Kc8c7 Rd3b3 Rh8b8 Rb3f3 Rb8f8 Rf3xf7 Rf8xf7 Nd6xf7 Ne7g6 a2a4 Kc7d7 a4a5 Ng6f4
Kc1d2 c6c5
 17/43	02:13	  34.611.441	259.057	+0.06	Qh5xe5 d4xe5 Rd8xd3 Rd1xd3 Ng8e7 Ne4d6+
Kc8c7 Rd3b3 Rh8b8 Rb3f3 Rb8f8 Rf3b3 b7b6 Rb3f3 c6c5 Rf3xf7 Rf8xf7 Nd6xf7 Ne7c6
Kc1c2 Kc7d7 Kc2d2


The current test version of gambit fruit is a bit slow because it is updating
some bitboards that are still unused.  It seems that playing the right more is
the important part and I doubt it takes long for most strong engines to find
this move.

Ryan



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