New MateFinder Release

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jhellis3
Posts: 485
Joined: Fri Aug 16, 2013 10:36 pm

New MateFinder Release

Post by jhellis3 » Mon Dec 14, 2015 9:11 pm

Updates:

1) Sync with latest SF.
2) Move to full hash key.
3) Increase max depth to 250.
4) Improve mate detection.

https://dl.dropboxusercontent.com/u/114 ... eFinder.7z

The archive includes the source and two very basic windows compiles.

Dann Corbit
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Location: Redmond, WA USA
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Re: New MateFinder Release

Post by Dann Corbit » Mon Dec 14, 2015 9:18 pm

Thank you so much for your efforts.
I practically can't live without the latest matefinder stockfish.
It's the neatest thing since sliced bread.

It's really excellent on general tactical problems, not just checkmates.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

Vinvin
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Full name: Vincent Lejeune

Re: New MateFinder Release

Post by Vinvin » Mon Dec 14, 2015 11:27 pm

jhellis3 wrote:Updates:

1) Sync with latest SF.
2) Move to full hash key.
3) Increase max depth to 250.
4) Improve mate detection.

https://dl.dropboxusercontent.com/u/114 ... eFinder.7z

The archive includes the source and two very basic windows compiles.
As analyzing tools, would mind to add 2 patches constantly put back by official SF :
1) draw after 3 repetitions (and not 2) : http://tests.stockfishchess.org/tests/v ... 227df1710b
2) bad corner bishop corner for pawn promotion.

Thanks !

jhellis3
Posts: 485
Joined: Fri Aug 16, 2013 10:36 pm

Re: New MateFinder Release

Post by jhellis3 » Tue Dec 15, 2015 1:07 am

1) I tried this, but it did not appear to actually solve the issue for me (at least in analysis), perhaps it works in actual gameplay?

2) Stockfish has this knowledge already, it is just quite specific, which makes it of limited efficacy. I can try to widen the coverage, but this is often quite hard to do if you are not willing to incorrectly score wins as draws (there is almost always another way to win), but many people are averse to the idea masking engine failings with false evals.

The problem is that if you miss even a single position which is a draw and don't score it as such, then you will not get the correct eval...

If you have the code ready to go though, I am more than happy to implement it.

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MikeB
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Re: New MateFinder Release

Post by MikeB » Tue Dec 15, 2015 3:28 am

jhellis3 wrote:Updates:

1) Sync with latest SF.
2) Move to full hash key.
3) Increase max depth to 250.
4) Improve mate detection.

https://dl.dropboxusercontent.com/u/114 ... eFinder.7z

The archive includes the source and two very basic windows compiles.
Compiling on the Mac:

Code: Select all

Step 2/4. Running benchmark for pgo-build ...
./matefinder bench 16 1 5000 default time > /dev/null
/bin/sh: line 1: 61046 Segmentation fault: 11  ./matefinder bench 16 1 5000 default time > /dev/null
make: *** [profile-build] Error 139
and just a normal (Non pgo) build

Code: Select all

Mac-Pro:src michaelbyrne$ ./matefinder
Segmentation fault: 11
Mac-Pro:src michaelbyrne$ 

stavros
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Re: New MateFinder Release

Post by stavros » Tue Dec 15, 2015 8:27 am

how much elo weaker than normal sf?

Jouni
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Re: New MateFinder Release

Post by Jouni » Tue Dec 15, 2015 2:14 pm

Short test. Despite name it was not better mate solver than default SF. Also it was not better in tactics. But when I acticate "study" switch it solved some difficult studies impressively fast! I quess "study" is nullmove off?
Jouni

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MikeB
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Location: Pen Argyl, Pennsylvania

Re: New MateFinder Release

Post by MikeB » Tue Dec 15, 2015 3:23 pm

Could not get it to run under Mac OS X 10.11.2 seg 11 error.

jhellis3
Posts: 485
Joined: Fri Aug 16, 2013 10:36 pm

Re: New MateFinder Release

Post by jhellis3 » Tue Dec 15, 2015 5:31 pm


Dann Corbit
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Location: Redmond, WA USA
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Re: New MateFinder Release

Post by Dann Corbit » Tue Dec 15, 2015 7:05 pm

Jouni wrote:Short test. Despite name it was not better mate solver than default SF. Also it was not better in tactics. But when I acticate "study" switch it solved some difficult studies impressively fast! I quess "study" is nullmove off?
It solves many mates that SF cannot solve.
The easy mates, all the engines will solve them.
I do admit that I did not test the latest version yet.
But I have used it to solve many dozens of checkmates in a short time that the factory fresh SF could not solve in an hour.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

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