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Subject: Re: Hash probe success rate

Author: Andrew Wagner

Date: 17:58:24 06/30/04

Go up one level in this thread


On June 30, 2004 at 20:37:25, Robert Hyatt wrote:

>On June 30, 2004 at 20:12:06, Andrew Wagner wrote:
>
>>On June 30, 2004 at 15:13:17, Robert Hyatt wrote:
>>
>>>On June 30, 2004 at 14:19:02, Andrew Wagner wrote:
>>>
>>>>I have a single transposition table, replace-always. I count a success when I
>>>>get back a score which allows me to return immediately, without making a move.
>>>>About what percent should my success rate be?
>>>
>>>
>>>maybe 10% in middlegame or less.
>>>
>>>
>>>>
>>>>Currently, my success rate starts around 5%, then drops turn-by-turn, until it's
>>>>0, then jumps back up and starts falling again. Any suggestions what might be
>>>>causing this? I've tested all my keys with generating them from scratch, and
>>>>have no problems there. My code is modelled after the TT code on bruce morelan's
>>>>site. Any suggestions appreciated....
>>>>
>>>>Andrew
>>>
>>>
>>>
>>>
>>>
>>>
>>>Always replace will never be as effective as an "intelligent decision" on what
>>>to replace...
>>>
>>>That's the first place to start...
>>
>>Are you saying you think it's bug-free as written? That this is normal behavior?
>>I'd like to get something simple working before doing something more
>>complicated...
>
>
>Wasn't meaning to say that at all.  Your question is very difficult to answer
>remotely.  IE what happens on fine 70 position???

Not pretty:
1. Score: .7; Time: 0; nodes: 7; PV: a1-b2
2. Score: .6; Time: 0; nodes: 33; PV: a1-b2 a7-a6
3. Score: .9; Time: 0; nodes: 82; PV: a1-b2 a7-a6 b2-c3
4. Score: .8; Time: 0; nodes: 204; PV: a1-b2 a7-b6 b2-c3 b6-c7
5. Score: .9; Time: 0; nodes: 368; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3
6. Score: .8; Time: 0; nodes: 753; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-d7
7. Score: .8; Time: 0; nodes: 1106; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-d7 d3-e
3
8. Score: .8; Time: 0; nodes: 1476; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-d7 d3-e
3 d7-e7
9. Score: .8; Time: 0; nodes: 2002; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-d7 d3-e
3 d7-e7 e3-d3
10. Score: .8; Time: 0; nodes: 2636; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-d7 d3-
e3 d7-e7 e3-d3 e7-d7
11. Score: .8; Time: 0; nodes: 3550; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
e3 b6-c7 e3-d3
12. Score: .8; Time: 0; nodes: 4389; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
e3 b6-c7 e3-d3
13. Score: .8; Time: 0; nodes: 5245; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
c3
14. Score: .8; Time: 0; nodes: 6140; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
c3
15. Score: .8; Time: 0; nodes: 7176; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
c3
16. Score: .8; Time: 0; nodes: 8305; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
c3
17. Score: .8; Time: 0; nodes: 9583; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3-
c3
18. Score: .8; Time: 0; nodes: 10936; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-c3
19. Score: .8; Time: 0; nodes: 12461; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-c3
20. Score: .8; Time: 0; nodes: 14015; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-c3
21. Score: .8; Time: 0; nodes: 19565; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-c3
22. Score: .8; Time: 1; nodes: 24730; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-f3 g6-h5 f3-e3 h5-g
6 e3-d3 g6-f6
23. Score: .8; Time: 1; nodes: 29041; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-h4 g6-f6
24. Score: .8; Time: 1; nodes: 34424; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-h4 g6-f6
25. Score: .8; Time: 1; nodes: 41152; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-h4 g6-f6
26. Score: .8; Time: 1; nodes: 50105; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d3
-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-h4 g6-f6
27. Score: .8; Time: 8; nodes: 892287; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6 d
3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-h4 g6-f6
28. Score: .8; Time: 27; nodes: 2993195; PV: a1-b2 a7-b6 b2-c3 b6-c7 c3-d3 c7-b6
 d3-e3 b6-c7 e3-f3 c7-d7 f3-g3 d7-e7 g3-h4 e7-f6 h4-g3 f6-g6 g3-h4 g6-f6



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