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Up Topic Rybka Support & Discussion / Rybka Discussion / My point of view
- - By Hamlet (**) Date 2008-08-13 01:01
Just came to home and here is one analysis. Not everyone is playing bliz:

2r3k1/1bq1rppp/p2pp3/1pn4P/3NP1P1/2PB1P2/PP1Q4/1K1R3R w - - 0 1


Analysis by Rybka 3 good:

20.Bd3-c2 Re7-d7 21.g4-g5
  ²  (0.54)   Depth: 15   00:00:00  13kN
20.Bd3-c2 Re7-d7 21.g4-g5
  ²  (0.54)   Depth: 15   00:00:00  13kN
20.Bd3-c2 d6-d5
  ²  (0.56)   Depth: 15   00:00:29  4470kN
20.Bd3-c2 d6-d5 21.e4xd5 Bb7xd5 22.h5-h6
  ²  (0.56)   Depth: 16   00:00:55  9052kN
20.Bd3-c2 d6-d5 21.h5-h6
  ²  (0.56)   Depth: 17   00:01:20  13986kN
20.Bd3-c2 d6-d5 21.h5-h6
  ²  (0.56)   Depth: 18   00:02:05  22587kN
20.Bd3-c2 d6-d5
  ²  (0.56)   Depth: 19   00:04:05  46317kN
20.Bd3-c2 d6-d5
  ²  (0.56)   Depth: 20   00:15:17  166mN
20.Bd3-c2 d6-d5 21.h5-h6
  ²  (0.56)   Depth: 21   00:32:28  380mN
20.Bd3-c2 d6-d5
  ²  (0.56)   Depth: 22   01:19:55  1013mN
20.Bd3-c2 d6-d5
  ²  (0.56)   Depth: 23   06:49:53  4874mN
20.Qd2-e3 Nc5xd3
  ²  (0.65)   Depth: 23   11:46:25  8120mN
20.Qd2-e3 Nc5xd3 21.Rd1xd3 f7-f6
  ²  (0.62)   Depth: 24   14:21:40  9618mN
20.Qd2-e3 Nc5xd3 21.Rd1xd3 f7-f6 22.h5-h6 g7-g6 23.Rh1-e1 Rc8-f8
  ²  (0.64)   Depth: 25   21:23:38  14332mN, tb=1
20.Qd2-e3 Nc5xd3 21.Rd1xd3 f7-f6 22.h5-h6 g7-g6 23.Rh1-e1 Rc8-f8
  ²  (0.64)   Depth: 26   30:10:41  19817mN, tb=1
20.Qd2-e3 Nc5xd3
  ²  (0.64)   Depth: 27   52:47:05  34340mN, tb=1
20.Qd2-e3 Nc5xd3
  ²  (0.60)   Depth: 28   95:04:24  63541mN, tb=18

and here is another position from another game+some rybka analysis:
this is about 6men tablebases.

5-men tablebases:
8/P3R3/4b1p1/4k3/3b4/1P3P2/4K3/8 b - - 0 1


Analysis by Rybka 3 good:

46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00  0kN
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00  0kN
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00  0kN
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00  0kN
46...Bd4xa7
  +-  (1.96)   Depth: 10   00:00:00  1kN
46...Bd4xa7
  +-  (1.96)   Depth: 11   00:00:00  1kN
46...Bd4xa7
  +-  (1.98)   Depth: 12   00:00:00  2kN, tb=1
46...Bd4xa7
  +-  (1.96)   Depth: 13   00:00:00  3kN, tb=1
46...Bd4xa7
  +-  (1.96)   Depth: 14   00:00:00  3kN, tb=2
46...Bd4xa7
  +-  (1.96)   Depth: 15   00:00:00  4kN, tb=4
46...Bd4xa7
  +-  (2.01)   Depth: 16   00:00:01  6kN, tb=11
46...Bd4xa7
  +-  (2.01)   Depth: 20   00:00:01  6kN, tb=11
46...Bd4xa7
  +-  (2.01)   Depth: 20   00:00:01  6kN, tb=11
46...Bd4xa7
  +-  (2.01)   Depth: 20   00:00:01  6kN, tb=11
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a8 Bb3-d5 52.Ra8-a5
  +-  (2.01)   Depth: 20   00:00:13  8kN, tb=19
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a8 Bb3-d5 52.Ra8-a5
  +-  (2.01)   Depth: 24   00:00:13  8kN, tb=19
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a8 Bb3-d5 52.Ra8-a5
  +-  (2.01)   Depth: 24   00:00:13  8kN, tb=19
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a8 Bb3-d5 52.Ra8-a5
  +-  (2.01)   Depth: 24   00:00:13  8kN, tb=19
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a8 Bb3-d5
  +-  (2.01)   Depth: 24   00:00:20  8kN, tb=19
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a8 Bb3-d5
  +-  (2.01)   Depth: 25   00:00:20  9kN, tb=19
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Kf5-f6 50.Ra7-a6+ Kf6-f5 51.Ra6-a3 Bb3-d5 52.Ra3-a5 Kf5-e6 53.Ra5-b5
  +-  (2.01)   Depth: 26   00:01:04  19kN, tb=59

6-men tablebases:

8/P3R3/4b1p1/4k3/3b4/1P3P2/4K3/8 b - - 0 1


Analysis by Rybka 3 good:

46...Bd4xa7
  +-  (1.92)   Depth: 2   00:01:35
46...Bd4xa7
  +-  (1.84)   Depth: 8   00:01:36
46...Bd4xa7 47.Re7xa7 Be6xb3 48.Ke2-f2 Ke5-f4 49.Ra7-a3 Bb3-e6 50.Ra3-a4+ Kf4-f5 51.Ra4-a5+ Kf5-f4 52.Ra5-a6
  +-  (1.84)   Depth: 13   00:01:37  0kN
46...Bd4xa7 47.Re7xa7 Be6xb3 48.Ke2-f2 Ke5-f4 49.Ra7-a3 Bb3-e6 50.Ra3-a4+ Kf4-f5 51.Ra4-a5+ Kf5-f4 52.Ra5-a6
  +-  (1.84)   Depth: 13   00:01:37  0kN
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-a7 Bb7-d5 53.Ra7-a6+ Kf6-f5
  +-  (2.03)   Depth: 13   00:01:37  0kN
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-a7 Bb7-d5 53.Ra7-a6+ Kf6-f5
  +-  (2.03)   Depth: 14   00:01:37  0kN
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-a7 Bb7-d5 53.Ra7-a6+ Kf6-f5
  +-  (2.03)   Depth: 15   00:01:37  0kN
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-c5 Kf6-e6 53.Rc5-e5+
  +-  (2.03)   Depth: 17   00:01:38  0kN
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-c5 Kf6-e6 53.Rc5-e5+
  +-  (2.03)   Depth: 18   00:01:38  0kN
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b5 53.Ra4-d4 Bb5-a6 54.Rd4-d8 Ke6-f5 55.Kf2-f3 Ba6-c4 56.Rd8-f8+
  +-  (2.03)   Depth: 19   00:01:41  6kN, tb=9
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b5 53.Ra4-d4 Bb5-a6 54.Rd4-d8 Ke6-f5 55.Kf2-f3 Ba6-c4 56.Rd8-f8+
  +-  (2.03)   Depth: 20   00:01:41  6kN, tb=9
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b5 53.Ra4-d4 Bb5-a6 54.Rd4-d8 Ke6-f5 55.Kf2-f3 Ba6-c4 56.Rd8-f8+
  +-  (2.03)   Depth: 21   00:01:41  6kN, tb=9
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b5 53.Ra4-d4 Bb5-a6 54.Rd4-d8 Ke6-f5 55.Kf2-f3 Ba6-c4 56.Rd8-f8+
  +-  (2.04)   Depth: 22   00:01:46  18kN, tb=24
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b5 53.Ra4-d4 Bb5-a6 54.Rd4-d8 Ke6-f5 55.Kf2-f3 Ba6-c4 56.Rd8-f8+
  +-  (2.04)   Depth: 23   00:01:46  19kN, tb=25
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b3 53.Ra4-b4 Bb3-c2 54.Kf2-f3 Ke6-f6 55.Rb4-b6+ Kf6-f5
  +-  (2.04)   Depth: 24   00:01:54  46kN, tb=67
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ke3-f2 Bd5-c4 52.Ra5-a4 Bc4-b3 53.Ra4-b4 Bb3-c2 54.Kf2-f3 Ke6-f6 55.Rb4-b6+ Kf6-f5
  +-  (2.04)   Depth: 25   00:01:57  56kN, tb=79
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a5 Kf5-e6 51.Ra5-b5 Bd5-c4 52.Rb5-b4 Bc4-d5 53.Ke3-f2 Ke6-f5 54.Rb4-b5 Kf5-e4 55.Kf2-g3 Ke4-d4 56.Kg3-g4 Bd5-e4 57.Rb5-b6 Kd4-e3 58.Kg4-g5
  +-  (2.04)   Depth: 26   00:02:14  79kN, tb=143
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-c4 50.Ra7-a4 Bc4-b3 51.Ra4-a5+ Kf5-f6 52.Ke3-d3 Bb3-d1 53.Kd3-e4 Bd1-c2+
  +-  (2.04)   Depth: 27   00:02:40  183kN, tb=284
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-c4 50.Ra7-a4 Bc4-b3 51.Ra4-a5+ Kf5-f6 52.Ke3-d3 Bb3-d1 53.Kd3-e4 Bd1-c2+
  +-  (2.04)   Depth: 28   00:02:55  222kN, tb=317
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-c4 50.Ra7-a4 Bc4-b3 51.Ra4-a5+
  +-  (2.04)   Depth: 29   00:04:12  265kN, tb=1352
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-c4 50.Ra7-a4 Bc4-b3 51.Ra4-a5+
  +-  (2.04)   Depth: 30   00:04:27  274kN, tb=1449

??????????????????????????????????????????????
because position after
46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3

8/R7/6p1/5k2/5P2/1b6/4K3/8 w - - 0 1


1. =  (0.00): 49.Ke2-e3
2. =  (0.00): 49.Ra7-a5+
3. =  (0.00): 49.Ra7-a1
4. =  (0.00): 49.Ra7-b7
5. =  (0.00): 49.Ra7-c7
6. =  (0.00): 49.Ra7-d7
7. =  (0.00): 49.Ra7-e7
8. =  (0.00): 49.Ra7-g7
9. =  (0.00): 49.Ra7-h7
10. =  (0.00): 49.Ra7-a8
11. =  (0.00): 49.Ke2-d2
12. =  (0.00): 49.Ke2-d3
13. =  (0.00): 49.Ke2-e1
14. =  (0.00): 49.Ra7-a3
15. =  (0.00): 49.Ke2-f1
16. =  (0.00): 49.Ke2-f2
17. =  (0.00): 49.Ke2-f3
18. -+  (-#15): 49.Ra7-a6
19. -+  (-#15): 49.Ra7-a2
20. -+  (-#15): 49.Ra7-f7+
21. -+  (-#14): 49.Ra7-a4

I don't care about another bugs but I showed this position to demonstrate rare power of 6men tablebases and because of bug in rybka I cant demonstrate it. It seems that I can't trust rybka as an analysis tool. :-( and I am not suprised that 6men tablebases don't help rybka. No wonder because of bug Rybka don't use tablebase information?.
Parent - By sylvain.renard.27 (**) Date 2008-08-13 12:23

> 6-men tablebases:
>
>

8/P3R3/4b1p1/4k3/3b4/1P3P2/4K3/8 b - -

> Analysis by Rybka 3 good:
>
> 46...Bd4xa7
>   +-  (1.92)   Depth: 2   00:01:35
> 46...Bd4xa7
>   +-  (1.84)   Depth: 8   00:01:36
> 46...Bd4xa7 47.Re7xa7 Be6xb3 48.Ke2-f2 Ke5-f4 49.Ra7-a3 Bb3-e6 50.Ra3-a4+ Kf4-f5 51.Ra4-a5+ Kf5-f4 52.Ra5-a6
>   +-  (1.84)   Depth: 13   00:01:37  0kN
> 46...Bd4xa7 47.Re7xa7 Be6xb3 48.Ke2-f2 Ke5-f4 49.Ra7-a3 Bb3-e6 50.Ra3-a4+ Kf4-f5 51.Ra4-a5+ Kf5-f4 52.Ra5-a6
>   +-  (1.84)   Depth: 13   00:01:37  0kN
> 46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-a7 Bb7-d5 53.Ra7-a6+ Kf6-f5
>   +-  (2.03)   Depth: 13   00:01:37  0kN
> 46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-a7 Bb7-d5 53.Ra7-a6+ Kf6-f5
>   +-  (2.03)   Depth: 14   00:01:37  0kN
> 46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-a7 Bb7-d5 53.Ra7-a6+ Kf6-f5
>   +-  (2.03)   Depth: 15   00:01:37  0kN
> 46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50.Ra7-a6 Bd5-b7 51.Ra6-a5+ Kf5-f6 52.Ra5-c5 Kf6-e6 53.Rc5-e5+
>   +-  (2.03)   Depth: 17   00:01:38  0kN
> 46...Bd4xa7 47.f3-f4+ Ke5-f5 48.Re7xa7 Be6xb3 49.Ke2-e3 Bb3-d5 50


  Hello,
I have some 6 men Tablesbases but my analysis with Rybka 3 (and Aquarium) is different, and better :

[+0.00]  d=23  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.18)
[+0.00]  d=22  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.12)
[+0.00]  d=21  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.09)
[+0.00]  d=20  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.06)
[+0.00]  d=19  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.04)
[+0.00]  d=18  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.03)
[+0.00]  d=17  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.02)
[+0.00]  d=16  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.02)
[+0.00]  d=15  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.01)
[+0.00]  d=14  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.01)
[+0.00]  d=13  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.01)
[+0.00]  d=12  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.00)
[+0.00]  d=11  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.00)
[+0.00]  d=10  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.00)
[+0.00]  d=9  1...Bxa7 2.f4 Kf5 3.Rxa7 Bxb3 4.Ke3 (0:00.00)
[+0.16]  d=9  1...Bxa7 (0:00.00)
[²/+0.96]  d=9  1...Bxa7 (0:00.00)
[+1.36]  d=9  1...Bxa7 (0:00.00)
[+1.56]  d=9  1...Bxa7 (0:00.00)
[±/+1.76]  d=8  1...Bxa7 2.f4 Kf5 3.Rxa7 Kxf4 4.b4 g5 5.Kf2 Bc4 (0:00.00)

In another post, I told that with many TB's, infinite analysis with Aquarium did not start after initializing Tablebases. But if you stop, and run analysis again, everything is ok.
  With Shredder and Fritz GUI's, infinite analysis starts after initializing Tablebases, but with Rybka 3 MP, analysis is incorrect!
I am not sure the bug comes from Rybka, maybe from Microsoft Windows!!!

  Best regards,
    Sylvain
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