Author: Vincent Lejeune
Date: 10:23:15 03/27/05
Go up one level in this thread
On March 27, 2005 at 11:48:06, Mike Byrne wrote:
>On March 27, 2005 at 11:40:03, Vincent Lejeune wrote:
>
>>On March 27, 2005 at 11:36:34, Mike Byrne wrote:
>>
>>>On March 27, 2005 at 11:18:35, Vincent Lejeune wrote:
>>>
>>>>On March 27, 2005 at 10:24:52, Mike Byrne wrote:
>>>>
>>>>>On March 27, 2005 at 06:56:35, Vincent Lejeune wrote:
>>>>>
>>>>>>On March 26, 2005 at 21:30:04, Robert Hyatt wrote:
>>>>>>
>>>>>>>On March 26, 2005 at 19:46:58, Vincent Lejeune wrote:
>>>>>>>
>>>>>>>>On March 26, 2005 at 15:34:45, Dieter Buerssner wrote:
>>>>>>>>
>>>>>>>>>On March 26, 2005 at 15:29:42, Dieter Buerssner wrote:
>>>>>>>>>
>>>>>>>>>>On March 26, 2005 at 15:20:17, Mike Byrne wrote:
>>>>>>>>>>
>>>>>>>>>>>after the main line : Kf2 f5 h3 Kc7 g3 hxg3 is winning no?
>>>>>>>>>>>
>>>>>>>>>>>Black(2): his
>>>>>>>>>>> white black
>>>>>>>>>>> 1 Kf2 f5
>>>>>>>>>>> 2 h3 Kc7
>>>>>>>>>>> 3 g3 ...
>>>>>>>>>>> 17 25.52 -7.17 3. ... hxg3+ 4. Kxg3 f4+ 5. Kg4 b6
>>>>>>>>>>> 6. h4 f3 7. Kxf3 gxh4 8. c6 Kxc6 9.
>>>>>>>>>>> Kg4 b5 10. a5 b4 11. Kxh4 Kb5 12. Kg4
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>In this line, Yace says 8. c6? is losing, while 8.cxb6 is draw.
>>>>>>>>>
>>>>>>>>>It is such an obvious blunder, that it looks like a bug in Crafty.
>>>>>>>>>
>>>>>>>>>Regards,
>>>>>>>>>Dieter
>>>>>>>>
>>>>>>>>
>>>>>>>>Probably a bug in the static eval of the pawn endgame. after 3 min@3 Ghz :
>>>>>>>
>>>>>>>I can't reproduce Mikes PV with this "c6 bug"... I don't get c6 at any point
>>>>>>>that I can see, it always takes...
>>>>>>>
>>>>>>>Any ideas?
>>>>>>
>>>>>>
>>>>>>I succeded to replicate c6 as best move :
>>>>>>1) without any EGTB
>>>>>>2) starting with this position 8/1p1k4/5p2/2Pp2p1/P2P3p/8/6PP/6K1 w - - 0 1
>>>>>>3) under chessbase interface
>>>>>>4) played 1. Kf2 f5 2. h3 Kc7 3. g3 hxg3+ 4. Kxg3 with 5 between each move
>>>>>>5) the score is rising for white but it so long I stopped
>>>>>>Is it a problem related to only pawns endgame eval or linked to hashtables too ?
>>>>>>
>>>>>
>>>>>I suggest not to test under Chessbase GUI unless you are using the native
>>>>>chessbase crafty engine.
>>>>
>>>>I use the native chessbase crafty engine.
>>>
>>>after Kxg3 above, you should see a draw score -- Crafty output from a console
>>>window is below - anything else and something is broken -- in my case it was
>>>bad kppkp egtb. I would contact Chessbase since they compiled thenative
>>>chessbase Crafty.
>>>
>>>White(4): Kxg3
>>>analyze.White(4): White(4): Kxg3
>>> clearing hash tables
>>> time surplus 0.00 time limit 10:00 (10:00)
>>> depth time score variation (1)
>>> 9 0.05 -0.50 4. ... f4+ 5. Kg4 b6 6. h4 f3 7. Kxf3
>>> gxh4 8. cxb6+ Kxb6 9. Kg4 Ka5 10. Kxh4
>>> Kxa4 (s=3)
>>> 9-> 0.08 -0.50 4. ... f4+ 5. Kg4 b6 6. h4 f3 7. Kxf3
>>> gxh4 8. cxb6+ Kxb6 9. Kg4 Ka5 10. Kxh4
>>> Kxa4
>>> 10 0.10 -0.82 4. ... f4+ 5. Kg4 Kd7 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 Ke7 9. a5 Ke6 10. Kxh4
>>> 10-> 0.11 -0.82 4. ... f4+ 5. Kg4 Kd7 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 Ke7 9. a5 Ke6 10. Kxh4
>>> 11 0.14 -0.72 4. ... f4+ 5. Kg4 Kd7 6. a5 Kd8 7.
>>> h4 f3 8. Kxf3 gxh4 9. Kg4 Ke7 10. Kxh4
>>> 11-> 0.16 -0.72 4. ... f4+ 5. Kg4 Kd7 6. a5 Kd8 7.
>>> h4 f3 8. Kxf3 gxh4 9. Kg4 Ke7 10. Kxh4
>>> 12 0.22 -0.50 4. ... f4+ 5. Kg4 Kd7 6. a5 Kd8 7.
>>> c6 Kc7 8. cxb7 Kxb7 9. h4 f3 10. Kxf3
>>> gxh4 11. Kg4 Ka6 12. Kxh4 Kxa5
>>> 12-> 0.25 -0.50 4. ... f4+ 5. Kg4 Kd7 6. a5 Kd8 7.
>>> c6 Kc7 8. cxb7 Kxb7 9. h4 f3 10. Kxf3
>>> gxh4 11. Kg4 Ka6 12. Kxh4 Kxa5
>>> 13 0.33 -0.60 4. ... f4+ 5. Kg4 Kd7 6. a5 Kd8 7.
>>> Kf3 Kc7 8. Kg2 Kb8 9. Kf2 Ka7 10. c6
>>> bxc6 11. Kf3
>>> 13-> 0.43 -0.60 4. ... f4+ 5. Kg4 Kd7 6. a5 Kd8 7.
>>> Kf3 Kc7 8. Kg2 Kb8 9. Kf2 Ka7 10. c6
>>> bxc6 11. Kf3
>>> 14 0.58 +1 4. ... f4+
>>> 14 0.78 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 14-> 0.89 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 15 1.05 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 15-> 1.18 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB> (s=2)
>>> 16 1.49 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 16-> 1.80 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB> (s=2)
>>> 17 2.60 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 17-> 3.11 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB> (s=2)
>>> 18 4.30 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 18-> 5.47 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB> (s=2)
>>> 19 8.07 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 19-> 11.30 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB> (s=2)
>>> 20 18.07 -0.01 4. ... f4+ 5. Kg4 Kc6 6. h4 f3 7. Kxf3
>>> gxh4 8. Kg4 b6 9. cxb6 Kxb6 10. Kxh4
>>> <EGTB>
>>> 20 24.85 8/9? 4. ... g4
>>
>>I succeded to replicate c6 as best move :
>>1) without any EGTB
>>2) starting with this position 8/1p1k4/5p2/2Pp2p1/P2P3p/8/6PP/6K1 w - - 0 1
>>3) under chessbase interface
>>4) played 1. Kf2 f5 2. h3 Kc7 3. g3 hxg3+ 4. Kxg3 with 5 seconds between each
>>move (?)
>
>somthing is broken - what else can I say ...it's not in Crafty's source
Let it think longer, here's what I get with crafty.exe (without chessbase
interface) :
17-> 10.46 -1.36 4. ... f4+ 5. Kg4 b6 6. cxb6+ Kxb6
7. h4 gxh4 8. Kxh4 Ka5 9. Kg4 Kxa4
10. Kxf4 Kb3 11. Kf5 Kc3 12. Ke5 Kc4
13. Ke6 Kxd4 14. Kd6 Kc4
18 13.78 -1 4. ... f4+!!
18 21.66 -3 4. ... f4+!!
18 28.60 -2.96 4. ... f4+ 5. Kg4 b6 6. cxb6+ Kxb6
7. h4 gxh4 8. Kxh4 Ka5 9. Kg4 Kxa4
10. Kxf4 Kb3 11. Ke5 Kc4 12. Ke6 Kxd4
13. Kd6 Ke4 14. Kc5 d4 15. Kc4
18-> 32.50 -2.96 4. ... f4+ 5. Kg4 b6 6. cxb6+ Kxb6
7. h4 gxh4 8. Kxh4 Ka5 9. Kg4 Kxa4
10. Kxf4 Kb3 11. Ke5 Kc4 12. Ke6 Kxd4
13. Kd6 Ke4 14. Kc5 d4 15. Kc4
19 37.13 +1 4. ... f4+
19 48.92 -1.86 4. ... f4+ 5. Kg4 b6 6. cxb6+ Kxb6
7. h4 gxh4 8. Kxh4 Ka5 9. Kg4 Kxa4
10. Kxf4 Kb3 11. Kf3 Kc3 12. Ke3 Kc4
13. Ke2 Kxd4 14. Kd2 Kc4 15. Kc2 d4
19-> 1:01 -1.86 4. ... f4+ 5. Kg4 b6 6. cxb6+ Kxb6
7. h4 gxh4 8. Kxh4 Ka5 9. Kg4 Kxa4
10. Kxf4 Kb3 11. Kf3 Kc3 12. Ke3 Kc4
13. Ke2 Kxd4 14. Kd2 Kc4 15. Kc2 d4
20 1:31 -1 4. ... f4+!!
20 2:24 -2.94 4. ... f4+ 5. Kg4 b6 6. h4 gxh4 7.
Kxh4 bxc5 8. Kg4 c4 9. Kxf4 Kb6 10.
Ke3 Ka5 11. Kd2 Kxa4 12. Kc2 Kb4 13.
Kb2 c3+ 14. Kc1 Kc4 15. Kc2 Kxd4
20 4:36 -1 4. ... b6!!
20 5:20 -3 4. ... b6!!
20 5:35 -M 4. ... b6!!
20 8:57 -6.55 4. ... b6 5. cxb6+ Kxb6 6. h4 f4+ 7.
Kg4 gxh4 8. Kxh4 f3 9. Kh3 f2 10. Kg2
Ka5 11. Kxf2 Kxa4 12. Kg1 Kb3 13. Kf2
Kc3 14. Ke3 Kc4 15. Ke2 Kxd4 16. Kd2
20-> 9:06 -6.55 4. ... b6 5. cxb6+ Kxb6 6. h4 f4+ 7.
Kg4 gxh4 8. Kxh4 f3 9. Kh3 f2 10. Kg2
Ka5 11. Kxf2 Kxa4 12. Kg1 Kb3 13. Kf2
Kc3 14. Ke3 Kc4 15. Ke2 Kxd4 16. Kd2
21 9:14 +1 4. ... b6
21 9:50 -1 4. ... b6!!
21 9:50 -6.71 4. ... b6 5. cxb6+ Kxb6 6. h4 f4+ 7.
Kg4 gxh4 8. Kxh4 f3 9. Kh3 Ka5 10.
Kg3 Kxa4 11. Kxf3 Ka5 12. Kg4 Kb4 13.
Kf4 Kc3 14. Ke5 Kc4 15. Kd6 Kxd4 16.
Kd7 Kc4
21 11:15 3/9? 4. ... Kd7
after 4:36 (on my amd@3000) crafty want to play b6??
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.