Comment author: lackofcheese 24 September 2014 03:23:53PM 4 points [-]

Also worth checking, out of interest: How does each of the bots perform when playing against itself?

Comment author: tetronian2 24 September 2014 03:54:15PM 11 points [-]

Good question--after running some matches:

AnderBot Cooperates until one of the copies randomly triggers a Defect, then both copies defect for the rest of the match.

CheeseBot, DMRB, SHTFT, SimpleTFTSeer, Switch, TatForTit, TwoFacedTit, and VOFB always cooperate with themselves.

Pip always defects against itself.

Comment author: lackofcheese 24 September 2014 01:27:47PM *  3 points [-]

Your win frequency graph is wrong; it should say 963 for VOFB, not 968.

Anyways, I did some more detailed statistics with the power of
ls | xargs perl -sn0e 'while (/next round:.(\N*)/sg) {print "$1->"}; print "$ARGV\n"' | sort -V
and here's the results I came up with:

963 matches went like this:
ALL->[Cheese,DMRB,SimHatingTFT,Switch,TwoFacedTit,VOFB]->[Cheese,DMRB,VOFB]

32 matches went like this:
ALL->[Cheese,DMRB,SimHatingTFT,Switch,TatForTit,TwoFacedTit]->[Cheese,DMRB,TatForTit]->[DMRB,TatForTit]->[TatForTit]
(13, 19, 30, 31, 33, 40, 42, 54, 74, 119, 137, 203, 236, 272, 301, 303,
321, 326, 343, 400, 438, 476, 516, 526, 539, 608, 626, 815, 823, 827, 941, 977)

3 matches went like this:
ALL->[Cheese,DMRB,SimHatingTFT,Switch,TatForTit,TwoFacedTit,VOFB]->[Cheese,DMRB,SimHatingTFT,TwoFacedTit]->[Cheese,DMRB]
(64, 553, 979)

Match #11 went like this:
ALL->[Cheese,DMRB,SimHatingTFT,Switch,TatForTit,VOFB]->[Cheese,DMRB,SimHatingTFT]->[Cheese,DMRB]

Match #12 went like this:
ALL->[Cheese,DMRB,SimHatingTFT,Switch,TwoFacedTit,VOFB]->[Cheese,DMRB,SimHatingTFT]->[Cheese,DMRB]

Comment author: tetronian2 24 September 2014 02:36:34PM 3 points [-]

Thanks; fixed. And thanks for this analysis! I've added it to the OP.

Comment author: lackofcheese 24 September 2014 10:33:31AM 5 points [-]

Thank you very much for running this and your effort in writing up the results; I'm very happy with how CheeseBot did!

Now I just need to work out how exactly TatForTit managed to exploit me...

Comment author: tetronian2 24 September 2014 02:26:52PM 4 points [-]

Congratulations! If you do work it out, please do post it here--I'm still not 100% sure how TatForTit managed to exploit CheeseBot and DMRB.

Comment author: JoshuaFox 24 September 2014 01:02:16PM 2 points [-]

"Simulate my opponent and figure out if it will defect or if defections will be punished; if so, Cooperate, and otherwise, defect."

Isn't that backwards?

Comment author: tetronian2 24 September 2014 02:25:08PM 3 points [-]

Thanks; fixed.

Comment author: Coscott 23 September 2014 06:23:40AM 1 point [-]

I noticed my bot has a typo. (I do not expect you to change it or anything, just letting you know for your write up if you are confused by my code.)

The two times it says "(fst y,Cooperate)" should have said "(Cooperate, fst y)" I wanted to simulate them next round assuming my previous prediction of their move was correct and I cooperate, not assuming they cooperate and I repeat my last move.

Should have taken you up on the offer to code it for me :( oh well.

Comment author: tetronian2 24 September 2014 02:51:12AM 0 points [-]

Thank you, I was a bit confused, and that did help me understand what you were going for. I'm actually very curious to see how the correct version performs; all of the bots will be open-sourced soon, so you're welcome to experiment. I will probably run some tests as well.

Comment author: Coscott 18 September 2014 01:12:51AM 1 point [-]

How many entries were there?

Comment author: tetronian2 19 September 2014 11:17:19PM 1 point [-]

There are 11 entries; I am very impressed by the amount of effort everyone put into their bots.

Comment author: Coscott 17 September 2014 01:24:20AM 3 points [-]

I am so excited. When will you post results?

Comment author: tetronian2 17 September 2014 08:11:05PM 3 points [-]

I'm glad! It depends on how long it takes me to write up all of the results, but probably within 1 week.

Comment author: tetronian2 02 September 2014 02:23:00AM 3 points [-]

Has anyone else seen the television show Brain Games? It is essentially intro-to-cognitive-biases aimed at the level of the average TV watcher; I was pleasantly surprised by how well it explains some basic biases with simple examples (though I have only seen an assortment of episodes from the 3rd and 4th season). However, most of the material given is not very actionable and is designed more for entertainment rather than self-improvement. Nevertheless, those interested in raising the sanity waterline and/or sparking interest in LW subjects among more average folk than we are might want to take a look at it.

Comment author: V_V 01 September 2014 02:36:31PM 1 point [-]

What is the deadline?

This post says September 1st, while the linked github repo says September 15, 2014 13:59 UTC.

Comment author: tetronian2 01 September 2014 03:04:22PM 1 point [-]

The correct deadline is Sept. 15th--I extended it by 15 days because of an error in the tournament code that went unfixed for two weeks, which delayed some people from writing their bots. I've updated the post to reflect this, thanks for catching it. Anyone who already submitted a bot is welcome to re-submit if they want to make changes to their bot before the 15th.

Comment author: Gavin 07 August 2014 03:47:51AM 3 points [-]

I suppose if you really can't stand the main character, there's not much point in reading the thing.

I was somewhat aggravated by the first few chapters, in particular the conversation between Harry and McGonagall about the medical kit. Was that one where you had your aggravated reaction?

I found myself sympathizing with both sides, and wishing Harry would just shut up--and then catching myself and thinking "but he's completely right. And how can he back down on this when lives are potentially at stake, just to make her feel better?"

Comment author: tetronian2 08 August 2014 05:23:32PM 2 points [-]

Yes, I did find that section grating. I'm describing my emotions post-hoc here (which is not generally reliable), but what I found irritating about the first few chapters was the fact that Harry acts in an extremely arrogant way, nearly to the point of coercing the adult characters, and the story-universe appears to back him up at every turn. This is the "Atlas Shrugged" effect described downthread by CellBioGuy. Harry is probably right in most of those arguments, but he is only so effortlessly correct and competent because the story-universe is designed so that he can teach these rationality lessons to other characters. It feels like the world is unfair, and unfair in the favor of an unlikeable and arrogant character. There is a real-world corollary of this, of course--very arrogant people who always get what they want--and I suspect my emotional reactions to these real and fictional situations are very similar.

(I have since caught up with the rest of the fic, and enjoyed most of it.)

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