Spightonians/ Discussion

Sub-page of Spightonians

Should the term include captures?

Tom:I like the name!

I was going to suggest that the five-position situation should be considered both before and after the move. However, on reflection, it is very often the case that the fact of a capture is much more important than whether an empty triangle is made at the same time. So I suggest that it should be assumed that no capture is made for a Spightonian. This is pretty much what you have done, except that it would eliminate the final Spightonian, leaving 20.

(Sebastian:) You are right that when captures come into play, the distinction about what was there before becomes a bit moot. We could write this in the introducting paragraph. However, I would rather keep the name "Spightonian" for all 21 geometrically possible patterns - just as the [ext] periodic table ends with elements that hardly ever are realized.

New Spightonians?

Tom: Is there a reason that you haven't included the 'throw in'?

(Sebastian:) "throw in" seems to refer more to a tactical purpose of a move rather than a specific move shape itself. Could you draw the Spightonian for what you have in mind?

Borders

(Sebastian:) How do we include moves at the edge of the board in this list?

[Diagram]

Close to the border

[Diagram]

mirrored

Can we replace the border with mirrored points like this?

Missing Spightonians?

I (Malcolm) only counted 20 diagrams. Also, I didn't see the following diagrams :

[Diagram]

Ripped keima

[Diagram]

Ripped keima plus one stone


Maybe I'm missing something.


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