Message #2451

From: Eduard Baumann <>
Subject: Re: [MC4D] MagicTile Solving
Date: Fri, 02 Nov 2012 22:05:22 +0100


The similar puzzle I mentioned is
MT irp {4,5} a30 F 0:0:1
MT irp {4,6} 12 F 0:0:1

I will attack
MT irp {4,5} a30 F 0:0:1
next time but I wanted study before he color topology of a30 and b30.


—– Original Message —–
From: Melinda Green
Sent: Friday, November 02, 2012 9:53 PM
Subject: Re: [MC4D] MagicTile Solving

{4,5} a30 is one of my favorite IRPs. I find it to be quite beautiful and symmetric. It is the one that I showcase on the main geometry page to introduce the subject. (Third image down.) The ‘b’ puzzle that surprised you is less symmetric but is still a fascinating structure. It looks very much like an apartment complex. I would like to know why Nan was able to solve it with such a smaller number of twists. Unless your macros are extremely long, it doesn’t seem like that can be the only difference. What do you think, Nan?


On 11/2/2012 11:17 AM, Eduard wrote:

Solving of MT irp {4,5} b30 F 0:0:1 —– || 11/02/2012 || 2393

Over 2000 twists. I worked without macros this time. Not low hanging fruit. Here 30 colors. In the similar puzzle "irp 4-6 12 f001" with 12 colors I worked with macros and needed 21’000 twists (Nan only 400 !!).