Author: Dann Corbit
Date: 12:02:03 03/27/00
Go up one level in this thread
On March 27, 2000 at 01:28:15, Kai Skibbe wrote:
>Crafty 17.07 has special code for detecting rookpawns and wrong bishop.
>But in the following position Crafty evaluates the position with a positive
>score.
>Why is the score of Crafty positive ?
>I have tested the position with the fritzengine of Crafty 17.07 with 32MB
>hashtables on a Celeron 500MHz and no tablebases. BTW with only two pawns on
>a-file Crafty shows a drawscore.
>
>[D]k7/8/P7/P7/P7/8/1K6/B7 w - - 0 1
Actually, it is a little bit funny. Crafty drops the evaluation back to zero as
it sees the pawn eaten. Then it gets its hopes up for the next pawn, and sees
it eaten. Finally, on the third pawn, it got its hopes up again, but I was not
patient enough to see them dashed again.
Crafty v17.10
White(1): epdpfga epd.epd epd.out
PFGA: EPD record: 1
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
13-> 0.31 1.56 1. Kb3 Ka7 2. Bd4+ Kxa6 3. Kb4 Kb7
4. Kb5 Ka8 5. a6 Kb8
14 0.44 -- 1. Kb3
14 0.46 ++ 1. Kb3!!
14 0.68 0.00 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
14-> 0.87 0.00 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
15 0.88 ++ 1. Kb3!!
15-> 1.15 0.39 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
16 1.16 ++ 1. Kb3!!
16-> 1.42 0.78 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
17 1.65 ++ 1. Kb3!!
17-> 1.93 1.17 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
18 1.95 ++ 1. Kb3!!
18-> 2.25 1.56 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
19 2.86 ++ 1. Kb3!!
19-> 3.13 1.95 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
20 3.53 ++ 1. Kb3!!
20-> 3.77 2.34 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
21 4.19 ++ 1. Kb3!!
21-> 4.46 2.73 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8
22 5.25 -- 1. Kb3
22 7.85 0.00 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8 <HT>
22-> 8.29 0.00 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8 <HT>
23 8.31 ++ 1. Kb3!!
23-> 6:50 0.39 1. Kb3 Ka7 2. Kb4 Kxa6 3. Bd4 Kb7 4.
Kb5 Ka8 5. a6 Kb8 6. a5 Ka8 7. a7 Kb7
8. a8=R Kxa8 <HT>
24 6:50 ++ 1. Kb3!!
time=7:22 cpu=99% mat=6 n=100206329 fh=99% nps=226230
ext-> checks=16150019 recaps=0 pawns=151201 1rep=968509 thrt:0
predicted=0 nodes=100206329 evals=96649
endgame tablebase-> probes done=11330 successful=11330
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