[r-t] Infinite Extensions

Mark Davies mark at snowtiger.net
Wed Mar 22 22:18:02 UTC 2017

A perhaps more basic question: are there any methods with PB leadheads 
which do extend to an infinite number of stages, and do so with 
different leadhead orders each time?

All the "standard" extensible methods I know of have the same leadhead 
order in all their extensions:

Plain Bob: +1
Little Bob: -2
Kent: -1
Yorkshire, Cambridge, Pudsey: +2
Bristol: -8

(Here I use a notation where +1 = a or g LH, +2 = b or h etc).

It might reduce the size of the problem posed in my last email if it 
were only necessary to consider a single leadhead order.


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