Rodent turns 1.0 !

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PK
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Joined: Mon Jan 15, 2007 11:23 am
Location: Warsza

Rodent turns 1.0 !

Post by PK »

hi all,

I have decided to release new version of Rodent as 1.0 and got a lot of help from Jim Ablett, who kindly provided his compiles, available at:

http://www.pkoziol.cal24.pl/rodent/rodent_download.htm

Why version 1.0? Two years and a couple of months ago I decided that Rodent will reach this milestone when it manages to beat Fruit 2.1 in a head to head match of 100 games. There were two more restrictions: that I will use a 32-bit compile and that time control will be short (1 minute + 1 second increment). I know this is not particularly great achievement by today's standards, but still there's a sense of fullfillment in it. I hope You will enjoy it too!

What's new in Rodent 1.0?

- move generator is symmetric now, i.e it generates moves for white and for black in the same order
- material evaluation uses some of Larry Kaufman's formulas
- root move ordering has changed
- some piece square tables/mobility/weak pawns tuning
- late move reduction is applied a bit more often

The first change had unusually strong effect, despite the fact that history move ordering is used on top of it. Apparently Rodent's search, due to slightly unusual lmr formulation, is prone to butterfly effect.
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jshriver
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Location: Morgantown, WV, USA

Re: Rodent turns 1.0 !

Post by jshriver »

Congrats!
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jdart
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Joined: Fri Mar 10, 2006 5:23 am
Location: http://www.arasanchess.org

Re: Rodent turns 1.0 !

Post by jdart »

That is quite an achievement.

Arasan is only a little stronger than Fruit 2.1 (CEGT 40/20) and that is after a lot of development.

--Jon
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PK
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Joined: Mon Jan 15, 2007 11:23 am
Location: Warsza

Re: Rodent turns 1.0 !

Post by PK »

It is still possible that on rating lists rodent 1.0 will finish below Fruit 2.1. As for achievement - the little thing got first 2300 Elo or so for free, inheriting it from Sungorus.

Out of curiosity, I have tried to run a couple of longer games against Fruit, this time using Jim Ablett's 64-bit compile. This is the second game, featuring some really alien-looking moves.

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ZirconiumX
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Full name: Hannah Ravensloft

Re: Rodent turns 1.0 !

Post by ZirconiumX »

PK wrote:It is still possible that on rating lists rodent 1.0 will finish below Fruit 2.1. As for achievement - the little thing got first 2300 Elo or so for free, inheriting it from Sungorus.

Out of curiosity, I have tried to run a couple of longer games against Fruit, this time using Jim Ablett's 64-bit compile. This is the second game, featuring some really alien-looking moves.

Still a blatant disregard for pawn structure, but congrats!

Matthew:out
tu ne cede malis, sed contra audentior ito
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carldaman
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Joined: Sat Jun 02, 2012 2:13 am

Re: Rodent turns 1.0 !

Post by carldaman »

Impressive game, Pawel - glad to see the new release, thank you :-)

Regards,
CL
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tmokonen
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Joined: Sun Mar 12, 2006 6:46 pm
Location: Kelowna
Full name: Tony Mokonen

Re: Rodent turns 1.0 !

Post by tmokonen »

The non-popcnt 64 bit compile doesn't seem to work on my non-popcnt 64 bit machine.
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Jim Ablett
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Full name: Jim Ablett

Re: Rodent turns 1.0 !

Post by Jim Ablett »

tmokonen wrote:The non-popcnt 64 bit compile doesn't seem to work on my non-popcnt 64 bit machine.

Hi Tony,

Theres been a mix up. The binary named non-popcnt is actually a popcount compile. You need this one >

https://dl.dropbox.com/u/5047625/rodent-64-ja.zip

Jim.
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tmokonen
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Location: Kelowna
Full name: Tony Mokonen

Re: Rodent turns 1.0 !

Post by tmokonen »

Thank you Jim, this compile works for me.
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geots
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Re: Rodent turns 1.0 !

Post by geots »

tmokonen wrote:Thank you Jim, this compile works for me.


That one would work for me also, except I need the one that actually is popcnt. And I can't download a damn thing that will even let me extract. Every time I see this git-hub crap- it's nothing but a mess. I want to download an engine version- not solve damn brain teasers.

Sorry Tony, my frustration is certainly not meant toward you.



A shot of rum, 3 cigarettes and 6 more xanax-

gts
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