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Subject: Re: Why is it called static evaluation? Because it is.

Author: chandler yergin

Date: 09:00:19 04/28/05

On April 27, 2005 at 16:49:28, Kevin K wrote:

>Is there dynamic evaluation?
>And if it is, what is dynamic evaluation?

Static evaluation in a quiet position is how the Analysis module works.

Weights are given, usually for Material first, then mobility,
rooks on open files, the 2 Bishop advantaqe, pawn structure, king safety,
and many others. These are programmed in.

The PV uses these to evaluate every possible move every iteration.

A high PV does "not" mean a winning position; it means for that 1/2 Ply
the evaluation is for that particular position. 1/2 Ply later, the situation
can change dramatically.

Example:

Here the Engine shows a very high PV!

Does it mean White will Win?

Of course not, the Position is a Draw.

My point again.. and I have Posted it several times.

"If your Engine cannot find the Mate; you can spin your hard drive for weeks
and it doesn't matter. You cannot rely on a "Static Eval" in a quiet
position.

197: Marshall,F - Teichmann,R, m1 London 1902
[D]8/2r5/8/6k1/PR4P1/4K3/8/8 w - - 0 1

Analysis by Shredder 8:

50.Rb7 Rxb7
  -+  (-3.05)   Depth: 1/2   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Rh7 51.Ke4 Ra7 52.Kd5 Ra5+ 53.Kc6 Kf6
  +-  (3.71)   Depth: 2/5   00:00:00
50.Kd4 Kf6 51.Rb6+ Kg5
  +-  (3.74)   Depth: 3/4   00:00:00
50.Rb5+ Kh4 51.g5 Kg4
  +-  (3.79)   Depth: 3/6   00:00:00
50.Rb5+ Kf6 51.a5 Rc6 52.Kf4 Ke7
  +-  (3.79)   Depth: 3/6   00:00:00
50.Rb5+ Kf6 51.a5 Re7+ 52.Kd4 Rd7+ 53.Ke4 Re7+ 54.Kd4 Rd7+ 55.Ke4 Re7+ 56.Kd4
Rd7+
  +-  (3.86)   Depth: 4/8   00:00:00
50.Rb5+ Kf6 51.a5 Re7+ 52.Kd4 Rd7+ 53.Rd5 Re7
  +-  (3.98)   Depth: 5/12   00:00:00
50.Rb5+ Kg6 51.Kd4 Re7 52.a5 Re6 53.g5
  +-  (3.95)   Depth: 6/13   00:00:01
50.Rb5+ Kg6 51.a5 Rc3+ 52.Kd4 Ra3 53.g5 Kh5 54.Rd5
  +-  (4.05)   Depth: 7/14   00:00:03  17kN, tb=694
50.a5 Re7+ 51.Re4 Rg7 52.a6 Rf7 53.Re5+ Kf6 54.Kd4
  +-  (4.06)   Depth: 7/14   00:00:03  22kN, tb=986
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.g5 Ra4+ 54.Ke5 Ra1
  +-  (4.12)   Depth: 7/14   00:00:05  30kN, tb=1377
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.g5 Ra4+ 54.Ke5 Ra1 55.Kd6
  +-  (4.08)   Depth: 8/16   00:00:06  40kN, tb=1668
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.g5 Ra2 54.Ke5 Kf7 55.Rb7+ Kg6
  +-  (4.12)   Depth: 9/20   00:00:07  68kN, tb=2670
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.g5 Ra4+ 54.Ke5 Kf7 55.Kd6 Kg6 56.Rd5
  +-  (4.14)   Depth: 10/23   00:00:08  110kN, tb=4118
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.g5 Ra1 54.Ke5 Kf7 55.Kd6 Kg7 56.Rf5
  +-  (4.22)   Depth: 11/24   00:00:10  204kN, tb=6472
50.a5 Ra7 51.Rb5+ Kg6 52.Kd4 Re7 53.a6 Kf7
  +-  (4.27)   Depth: 12/27   00:00:13  421kN, tb=10725
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.g5 Kf7 54.Kd5 Ra1
  +-  (4.31)   Depth: 13/28   00:00:17  867kN, tb=16774
50.a5 Re7+ 51.Kd4 Ra7 52.Ra4 Kf4 53.a6 Ra8 54.Kc5+ Ke5 55.a7 Kf6 56.Kb5 Ke5
  +-  (4.37)   Depth: 14/29   00:00:21  1655kN, tb=24652
50.a5 Ra7 51.Rb5+ Kf6 52.Rb6+ Kg5 53.a6 Re7+ 54.Kf3 Rf7+ 55.Kg3 Rd7 56.Rb5+ Kg6
57.Ra5 Ra7 58.Kf4 Kf6 59.Ke4 Ke6 60.g5 Kf7
  +-  (4.54)   Depth: 15/30   00:00:36  3427kN, tb=47020
50.a5 Ra7 51.Ra4 Ra8 52.Kd4 Kf6 53.g5+ Kg6 54.a6 Kf7
  +-  (4.79)   Depth: 16/36   00:01:03  7163kN, tb=89545
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.Kd5
  +-  (4.79)   Depth: 16/36   00:01:09  8231kN, tb=100118
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.Kd5 Kg5 54.Kc6+ Kg6 55.Kb6 Re3 56.Rc5 Rb3+
57.Kc7 Kf7 58.Rf5+ Kg6 59.Re5
  +-  (4.79)   Depth: 17/34   00:01:25  9140kN, tb=122394
50.a5 Rc3+ 51.Ke4 Ra3 52.Rb5+ Kg6 53.Kd5 Kg7 54.Kc6 Kf7 55.Kb6 Ra2 56.Kb7 Ra1
57.a6 Rd1 58.a7 Rd6
  +-  (4.88)   Depth: 18/36   00:02:40  15676kN, tb=198864

(,  28.04.2005)

Re: Why is it called static evaluation? Because it is. Thorsten Czub 03:20:32 04/29/05
- Re: Why is it called static evaluation? Because it is. chandler yergin 04:45:31 04/29/05
  - example 3: Thorsten Czub 07:26:30 04/30/05
  - example Thorsten Czub 05:27:14 04/29/05
    - Re: example Ed Schröder 00:42:28 04/30/05
      - Re: example Thorsten Czub 06:57:18 04/30/05
    - Re: example CSTal Rolf Tueschen 05:34:38 04/29/05
      - Re: example CSTal Thorsten Czub 06:51:04 04/29/05
        
        Re: example CSTal Rolf Tueschen 17:31:08 04/29/05
        
        Re: example CSTal Fernando Villegas 10:17:33 04/30/05
        
        Re: example CSTal Tony Petters 04:53:33 04/30/05
        
        Re: example CSTal Thorsten Czub 06:44:01 04/30/05
        
        Re: example CSTal Uri Blass 02:12:32 04/30/05
        
        Re: example CSTal Thorsten Czub 06:36:24 04/30/05
  - Re: Why is it called static evaluation? Because it is. Thorsten Czub 05:14:12 04/29/05
    - Re: Why is it called static evaluation? Because it is. Rolf Tueschen 05:28:39 04/29/05

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