Kate Jones from Kadon Enterprises
contacted me to say their Grand Snowflake puzzle was
equivalent to the "MacMahon" Squares in four colours.
The puzzle is shown to the right - click it to link to
Kadon's page. After
some thought, I discovered it was not the same, since the
pieces with heart-shaped connectors connect to the opposite
"colour". The 4 +hearts piece can sit next to the 4 -hearts
piece. This got me thinking that there must be a third
variation on the puzzle. The piece connections for each are
shown below
"MacMahon"
Squares: A --> A, B --> B, C --> C, D --> D
Grand Snowflake:
A --> A, B --> B, C --> D, D --> C
Abaroth's Squares: A
--> B, B --> A, C --> D, D --> C
The puzzle can be solved with no
restriction as to which pieces make up the edges. I will post any further information
regarding this latest idea as I find it.