Author: Jeremiah Penery
Date: 13:35:28 10/04/02
Go up one level in this thread
On October 04, 2002 at 08:03:19, Omid David wrote:
>And a third position which is also a draw:
>
>[D] 8/8/8/k3p3/1p1pPp2/1PpP1P2/B1P5/1K6 w - - 0 1
No fair, an illegal position! :)
The algorithm doesn't do very well here. It sees there is a potential path for
the king, and doesn't give a drawscore. I think it's sort of failing at the
right edge of the board in certain circumstances.
I figured out the problem, and now it does well here:
With:
1 0.00 0.00 1. Kc1
1-> 0.00 0.00 1. Kc1
..........................................
45 4.33 0.00 1. Kc1 Kb5 2. Bb1 Kc5 3. Kd1 Kd6 4.
Ke2 Ke6 5. Kf2 Kf6 6. Kg2 Kg5 7. Kh3
Kh5 8. Ba2 Kg5 9. Bb1
45-> 4.33 0.00 1. Kc1 Kb5 2. Bb1 Kc5 3. Kd1 Kd6 4.
Ke2 Ke6 5. Kf2 Kf6 6. Kg2 Kg5 7. Kh3
Kh5 8. Ba2 Kg5 9. Bb1
Elapsed Time: 4.42, CPU Time: 4.24, CPU Use: 95%
Material Balance: 350, Previous Moves Predicted: 0
Nodes: 3952436, Evaluations: 1585606, FH%: 89%, NPS: 894k
EXTENSIONS->
Threat: 11, Passed Pawn: 10565, Recapture: 6796
One-Reply: 3021, Check: 382285
PRUNING-> Razors-> White: 2464, Black: 19345
Futility-> White: 83766, Black: 247508
TABLEBASES-> Probes: 53, Successful: 18
HASH TABLES-> Hash Hits: 59% (816165/1365799)
Pawn Hash Hits: 99% (2287204/2288627)
Hash Table Filled: 24%
Without:
1 0.00 3.40 1. Kc1
1-> 0.00 3.40 1. Kc1
...........................
41 4.43 -- 1. Kc1
41 6.72 0.00 1. Kc1 Kb6 2. Kd1 Kc6 3. Ke2 Kd6 4.
Kf2 Ke6 5. Kg2 Kf6 6. Kf1 Kg6 7. Kg2
Kh6 8. Kh3 Kg5 9. Kh2 Kg6 10. Kh3 Kg5
41-> 6.72 0.00 1. Kc1 Kb6 2. Kd1 Kc6 3. Ke2 Kd6 4.
Kf2 Ke6 5. Kg2 Kf6 6. Kf1 Kg6 7. Kg2
Kh6 8. Kh3 Kg5 9. Kh2 Kg6 10. Kh3 Kg5
...........................
45 28.70 0.00 1. Kc1 Kb6 2. Kd1 Kc6 3. Ke2 Kd6 4.
Kf2 Ke6 5. Kg2 Kf6 6. Kf1 Kg6 7. Kg2
Kh6 8. Kh3 Kg5 9. Kh2 Kg6 10. Kh3 Kg5
45-> 28.70 0.00 1. Kc1 Kb6 2. Kd1 Kc6 3. Ke2 Kd6 4.
Kf2 Ke6 5. Kg2 Kf6 6. Kf1 Kg6 7. Kg2
Kh6 8. Kh3 Kg5 9. Kh2 Kg6 10. Kh3 Kg5
Elapsed Time: 28.78, CPU Time: 28.04, CPU Use: 97%
Material Balance: 350, Previous Moves Predicted: 0
Nodes: 32458587, Evaluations: 5693896, FH%: 97%, NPS: 1127k
EXTENSIONS->
Threat: 835, Passed Pawn: 500170, Recapture: 8659
One-Reply: 70371, Check: 1464672
PRUNING-> Razors-> White: 298398, Black: 84185
Futility-> White: 4197130, Black: 1149765
TABLEBASES-> Probes: 6265, Successful: 1612
HASH TABLES-> Hash Hits: 103% (15629675/15116155)
Pawn Hash Hits: 99% (13413939/13418667)
Hash Table Filled: 86%
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.