I just released the source for 23.8. Two changes.
1. The crash with egtbs has been fixed. Was related to the "hash the PV" code. After an EGTB hit, I call "HashStore" to save the position/score to avoid doing another egtb probe for the same position. Unfortunately, there was a way I failed to update the PV (value >= beta) which broke HashStore since the PV contained garbage. Bad moves wreck things later. It is fixed in this version
2. Max depth is now 128, and PVs can also be 128 moves long, since the PV hash code works so well this seemed advisable to prevent a few short PVs (with just 64 moves in them).
Crafty 23.8
Moderators: hgm, Rebel, chrisw
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Peter Skinner
- Posts: 1763
- Joined: Sun Feb 26, 2006 1:49 pm
- Location: Edmonton, Alberta, Canada
- Full name: Peter Skinner
Re: Crafty 23.8
Is the FTP down? I can't log in to grab the new source and nothing is in my emailbob wrote:I just released the source for 23.8. Two changes.
1. The crash with egtbs has been fixed. Was related to the "hash the PV" code. After an EGTB hit, I call "HashStore" to save the position/score to avoid doing another egtb probe for the same position. Unfortunately, there was a way I failed to update the PV (value >= beta) which broke HashStore since the PV contained garbage. Bad moves wreck things later. It is fixed in this version
2. Max depth is now 128, and PVs can also be 128 moves long, since the PV hash code works so well this seemed advisable to prevent a few short PVs (with just 64 moves in them).
Peter
I was kicked out of Chapters because I moved all the Bibles to the fiction section.
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bob
- Posts: 20943
- Joined: Mon Feb 27, 2006 7:30 pm
- Location: Birmingham, AL
Re: Crafty 23.8
ftp is gone.Peter Skinner wrote:Is the FTP down? I can't log in to grab the new source and nothing is in my emailbob wrote:I just released the source for 23.8. Two changes.
1. The crash with egtbs has been fixed. Was related to the "hash the PV" code. After an EGTB hit, I call "HashStore" to save the position/score to avoid doing another egtb probe for the same position. Unfortunately, there was a way I failed to update the PV (value >= beta) which broke HashStore since the PV contained garbage. Bad moves wreck things later. It is fixed in this version
2. Max depth is now 128, and PVs can also be 128 moves long, since the PV hash code works so well this seemed advisable to prevent a few short PVs (with just 64 moves in them).
Peter
To access all the old stuff (exactly as it was on ftp box):
www.cis.uab.edu/hyatt/crafty
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Robert Pope
- Posts: 558
- Joined: Sat Mar 25, 2006 8:27 pm
Re: Crafty 23.8
Is it possible for you to update the ftp link you have at http://www.cis.uab.edu/hyatt/ to reflect this change? That's where I always go by default.
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bob
- Posts: 20943
- Joined: Mon Feb 27, 2006 7:30 pm
- Location: Birmingham, AL
Re: Crafty 23.8
Done, thanks for pointing it out...Robert Pope wrote:Is it possible for you to update the ftp link you have at http://www.cis.uab.edu/hyatt/ to reflect this change? That's where I always go by default.
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Tom Likens
- Posts: 303
- Joined: Sat Apr 28, 2012 6:18 pm
- Location: Austin, TX
Re: Crafty 23.8
I'm sorry, I know why you did it, but I had to laugh. How things have changed when a 64 move PV is considered "short"!bob wrote:I just released the source for 23.8. Two changes.
2. Max depth is now 128, and PVs can also be 128 moves long, since the PV hash code works so well this seemed advisable to prevent a few short PVs (with just 64 moves in them).
--tom