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        Arimaa >> Bot Development >> bot_ziltoid
        
(Message started by: Hippo on Jul 19^th, 2012, 8:46am)

Title: bot_ziltoid
Post by Hippo on Jul 19^th, 2012, 8:46am

Is bot_ziltoid just briareus with new name or there were huge change in code/hardware?

Title: Re: bot_ziltoid
Post by rbarreira on Jul 19^th, 2012, 9:35am

Same code on weaker hardware than the one in the postal.

I'll probably start making small changes soon though.

Title: Re: bot_ziltoid
Post by Fritzlein on Jul 19^th, 2012, 12:07pm

Thanks for the clarification, and thanks for putting up a 30s/move bot so it isn't straight blitz against developer bots. :) Good luck with the tweaking!

Title: Re: bot_ziltoid
Post by browni3141 on Jul 19^th, 2012, 10:48pm

Is ziltoid running on a calculator? It amazes me how much of a difference there seems to be between ziltoid and briareus! I guess I don't have a good impression of briareus strength because I don't play it often and I am rapidly improving. Also, I might be trying to compare postal briareus with 30s ziltoid, which is obviously going to give me shady impressions of their difference in strength. It makes me wonder what a bot could do running on a supercomputer. I kind of doubt it could beat the best humans consistently, but it would be an interesting (although probably impractical) experiment.

Title: Re: bot_ziltoid
Post by rbarreira on Jul 20^th, 2012, 2:06am

on 07/19/12 at 22:48:39, browni3141 wrote:

It's running on a computer that's about 4 times slower than the one used for the postal tournament. Between that and 30s per move instead of 4 hours, we're talking about a factor of 1920 in thinking power, that is enough to go 1-2 plies deeper depending on the position. So I'm not surprised that you see a big difference in the move quality.

on 07/19/12 at 22:48:39, browni3141 wrote:

It makes me wonder what a bot could do running on a supercomputer. I kind of doubt it could beat the best humans consistently, but it would be an interesting (although probably impractical) experiment.

The biggest computer my bot has run on had 64 cores, it was pretty fast but doesn't count as a super-computer.

I have a version that can run on clusters but it didn't work very well on the Amazon EC2 cluster when I tried it some time ago due to high communication latency between the servers. In the meantime they claimed to have fixed a bug that was preventing users from choosing machines that are very closely located, maybe this helps.

For me, renting such a cluster (maybe a 100 machines or so) would be the only realistic way to have a lot of computing power for the bot. Even then it wouldn't be cheap, as each machine costs a few dollars per hour.

Title: Re: bot_ziltoid
Post by mistre on Feb 7^th, 2013, 9:43am

I'm curious.... Is the Bot_Ziltoid that you are entering into this year's computer championship any different from Bot_Briareus from last year's championship?

Title: Re: bot_ziltoid
Post by rbarreira on Feb 11^th, 2013, 2:59am

on 02/07/13 at 09:43:08, mistre wrote:

I'm curious.... Is the Bot_Ziltoid that you are entering into this year's computer championship any different from Bot_Briareus from last year's championship?

It is different, but not very much. Just a few small improvements (like disallowing 3-for-1 moves) and bug fixes.