Re: A replicator in the Devore rule, Organic Builder challenge, Rule table repository

[Tim Hutton]

On Sun, May 17, 2009 at 5:51 PM, Calcyman <calc...@tiscali.co.uk> wrote:
> Speaking of your Organic Builder challenge, I have completed
> most of the challenges. The only ones that I haven't managed
> are 'ladder', 'replicate' and 'cell'. The 'ladder' seems to be
> faulty - I've successfully built the ladder, but it returns an error
> when I try to evaluate the challenge. It says that the middles
> require 3 bonds, even when they have 3 bonds.
>
> I used these reactions:
>
>
> e1 + a0 => e2 + a0
> x2 + x0 => x4x5
> x4y1 => x4y2
> x5 + y5 => x5y5
>
>
> But I had to make sure that the atoms bond on the correct side
> of the ladder. Is there any way of doing this automatically?

Here's a solution to challenge 14 (ladder) that works reliably:

e1 + e0 => e8e6
x8y1 => x3y9
x9 + y6 => x2y3
x2 + x0 => x4x5
x4y7 => x8 + y3
x5 + y3 => x6y7

By making the molecule symmetric before taking the next atom, it
doesn't matter which side it bonds from.

But I get the same 'middles should have 3 bonds' error. Oh dear. I
don't remember seeing this before. I'm afraid I haven't looked at the
code for a while so I can't promise to correct this problem.

Tim

--
Tim Hutton - http://www.sq3.org.uk