Pepito problem

[Tord Romstad]

Geschrieben von: / Posted by: Tord Romstad at 10 March 2004 14:04:31:

Pepito is probably a notch too strong as a sparring partner for my engine,
but today I felt optimistic and wanted to give it a try. In the first game
Gothmog managed a lucky shot on the kingside from a dubious position (I'm
surprised that Pepito didn't see that 25... exf5 loses instantly), and won
quickly.
At the end of the game, Pepito crashed. There were no interesting or
useful information to be found in the xboard debug output. I've found
that the crash is reproducible. When I start Pepito in xboard and use
"Edit Game" to enter the moves until 26. Nxd5 and let Pepito play black
from there, it always crashes directly after resigning the game.
Is this a known problem? Is there a good way to solve it? In case it
is relevant, the game was played using xboard on a Linux machine.
The game:
[Event "Computer chess game"]
[Site "aload.uio.no"]
[Date "2004.03.10"]
[Round "1"]
[White "Gothmog 0.4.6"]
[Black "Pepito v1.59 (Conservador)"]
[Result "1-0"]
[TimeControl "240+1"]
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8.
Nxd4 Qb6 9. Qd2 Qxb2 10. Rb1 Qa3 11. Bb5 Ndb8 12. O-O Qa5 13. Rb3 Bb4 14.
Rfb1 Be7 15. Qe2 O-O 16. Qh5 Bc5 17. Rd1 a6 18. Bxc6 Nxc6 19. Kh1 Bd7 20.
Bd2 Qc7 21. Be3 Na5 22. Rbb1 Nc4 23. Bg1 Na3 24. Rb3 b5 25. Nf5 exf5 26.
Nxd5 Qc6 27. Nf6+ Qxf6 28. exf6
{Black resigns} 1-0

Tord

[Will Singleton]

Geschrieben von: / Posted by: Will Singleton at 10 March 2004 18:00:49:
Als Antwort auf: / In reply to: Pepito problem geschrieben von: / posted by: Tord Romstad at 10 March 2004 14:04:31:

Using winboard, I can't reproduce the crash. It appears that Pepito sends a move to winboard after resigning, which perhaps causes different behavior in xboard. btw, why not enter the moves using Paste game from clipboard, and the arrow keys?
104813 >first : ?
104907 first : force
104907 >first : ping 3
104907 first : undo
104922 Pepito is probably a notch too strong as a sparring partner for my engine,

but today I felt optimistic and wanted to give it a try. In the first game
Gothmog managed a lucky shot on the kingside from a dubious position (I'm
surprised that Pepito didn't see that 25... exf5 loses instantly), and won
quickly.
At the end of the game, Pepito crashed. There were no interesting or
useful information to be found in the xboard debug output. I've found
that the crash is reproducible. When I start Pepito in xboard and use
"Edit Game" to enter the moves until 26. Nxd5 and let Pepito play black
from there, it always crashes directly after resigning the game.
Is this a known problem? Is there a good way to solve it? In case it
is relevant, the game was played using xboard on a Linux machine.
The game:
[Event "Computer chess game"]
[Site "aload.uio.no"]
[Date "2004.03.10"]
[Round "1"]
[White "Gothmog 0.4.6"]
[Black "Pepito v1.59 (Conservador)"]
[Result "1-0"]
[TimeControl "240+1"]
1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8.
Nxd4 Qb6 9. Qd2 Qxb2 10. Rb1 Qa3 11. Bb5 Ndb8 12. O-O Qa5 13. Rb3 Bb4 14.
Rfb1 Be7 15. Qe2 O-O 16. Qh5 Bc5 17. Rd1 a6 18. Bxc6 Nxc6 19. Kh1 Bd7 20.
Bd2 Qc7 21. Be3 Na5 22. Rbb1 Nc4 23. Bg1 Na3 24. Rb3 b5 25. Nf5 exf5 26.
Nxd5 Qc6 27. Nf6+ Qxf6 28. exf6
{Black resigns} 1-0

Tord

[Will Singleton]

Geschrieben von: / Posted by: Will Singleton at 10 March 2004 18:05:42:
Als Antwort auf: / In reply to: Re: Pepito problem geschrieben von: / posted by: Will Singleton at 10 March 2004 18:00:49:



104813 >first : ?
104907 <first : Interrupting search...
104907 <first : resign
GameEnds(31, Black resigns, 1)
104907 >first : result 1-0 {Black resigns}
104907 >first : force
104907 >first : ping 3
104907 <first : move c7c6 
Undoing extra move from first, gameMode 8
104907 >first : undo
104922 <first : pong 3