[Retros] serieshelpstalemate (Mauldon Rules)

[Alexander George]

Alexander George and J.G. Mauldon
Variant Chess, 1992

8/8/2R1N3/2n5/8/QbkrRq2/1n6/B3K3

(a) diagram
(b) rotate 180 degrees
Which is a sound serieshelpstalemate  in 7?  (Mauldon Rules)


Definition of Mauldon Rules (by recursion):

(1) A sound serieshelpstalemate in 1:

- in the diagram position Black may move;
- Black makes one move (according to the power of the pieces) leading  
to a position in which White may move;
- White makes one move stalemating Black.

(2) A sound serieshelpstalemate in n:

- in the diagram position Black may move;
- Black makes one move (according to the power of the pieces) leading  
to a serieshelpstalemate in n-1.

Using Mauldon Rules (so named by me -- Jim never used the term!), a  
serieshelpstalemate in 1 coincides with a standard  
serieshelpstalemate in 1.  But this is not the case for longer  
serieshelpstalemates.  (I don't know of any other problems like this  
-- have there been?)

I've posted the problem on http://ChessProblem.net .  You can find  
the solution there:

http://chessproblem.net/viewtopic.php?p=211#211

Regards,

Alexander George
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