[r-t] What is a 'regular' method

Ian McCulloch ianmcc at physics.uq.edu.au
Mon Feb 6 01:52:06 UTC 2012

I'm a bit confused now.  What is the correct terminology for the 
well-known 41 surprise minor methods?


On Mon, 6 Feb 2012, Graham John wrote:

> AJLR wrote:
>> In Appendix B of Michael J de C Henshaw's '*Learning Methods*' it says:
> Thank you Amanda. I note that this makes no reference to single changes or
> the leadhead notation, only plain bob leadheads and no penultimate places.
> RAS wrote:
>> Historically, the CC have used 'regular method' to mean one
>> conforming to the decisions.
> Yes. I understand from Tony Smith that the term was abandoned by the CC in
> 1970, and was originally a method conforming to the then decisions based
> upon the 1903 Report of the Committee on Legitimate Methods.
>> I'm not sure I'd define 'regular' in terms of
>> lead-head codes.  That seems backwards to me.
> I think it would be useful to have a modern definition that is broadly in
> line with the historical view and current usage, as well as having the sense
> of being a 'conventional' method. I therefore suggest it should be:-
> 1 Plain Bob leadheads
> 2 12, 1n, 1 or 12n leadend change
> 3 No penultimate change (excluding the halflead)
> 4 Palindromic symmetry
> This would be more restrictive than those methods given leadhead codes,
> which cover 1 & 2 plus the equivalent twin hunt methods. So far, I haven't
> seen any evidence to suggest whether the term 'regular' applies to twin hunt
> methods, or not.
> Further criteria that are perhaps also relevant (at least from the Minor
> tradition):-
> 5. No single changes (sorry Plain Bob Doubles!)
> 6. No more than two blows in any place (sorry Plain Bob on odd numbers! but
> without this, any method with three blows would be considered regular)
> Graham
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