Author: Ed Schröder
Date: 08:43:18 05/23/00
Go up one level in this thread
On May 23, 2000 at 08:00:53, Steve Coladonato wrote: >On May 23, 2000 at 00:05:36, Jeremiah Penery wrote: > ><snip> >>http://www.rebel.nl/db2.htm > >The following in an excerpt from the above link and I don't fully understand the >evaluation. > > 13. Nc6-a5 > Kasparov,G :11.00 -0.03 Nc6-a5 Bb3-c2 c7-c5 d4-d5 g7-g6 b2-b4 > Rebel 8.0 :11.00 -0.03 Nc6-a5 Bb3-c2 c7-c5 d4-d5 g7-g6 b2-b4 > 14. Bb3-c2 > DEEP BLUE :11.00 0.13 Bb3-c2 c7-c5 b2-b3 Ra8-c8 Bc1-e3 g7-g6 > Rebel 8.0 :11.00 0.13 Bb3-c2 c7-c5 b2-b3 Ra8-c8 Bc1-e3 g7-g6 > 14. c7-c5 > Kasparov,G :10.00 -0.05 c7-c5 b2-b3 Ra8-c8 Bc1-e3 g7-g6 d4xe5 > Rebel 8.0 :10.00 -0.05 c7-c5 b2-b3 Ra8-c8 Bc1-e3 g7-g6 d4xe5 > >I am interpreting the evaluations to be relative and not absolute (for the 3 >moves above, the white position is evaluated better in all cases) So, at move >13, Rebel evaluated the position -0.03 at 11 ply. At move 14, the evaluation is >now 0.13 at ply 11 again. This I can understand because the line has changed >from d4-d5 to b2-b3 and move 14 has looked one ply deeper than move 13. >However, on black's move 14 the ply count is now 10 which indicates that the >depth reached in the analysis is the same as that for white's move 14 but the >evaluation has changed from +0.13 to +0.05 (absolute) the line being identical >except fot the inclusion of d4xe5 in the printout. My question is why would the >program change its evaluation of the position if it searched to exactly the same >depth? > >Regards, > >Steve It has something to do with the right to move and not to go for a draw (score) too easily. Ed
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