[r-t] Long lengths of Bristol Surprise Major

[Graham John]

On 20 March, I wrote:

> I am sure that one can get much closer than this one [a 68544],
> but here is a simple perfect six-part as a starter.

For completeness, here is the starting double extent.

80640 Bristol Surprise Major
Composed by Graham A C John
 23456  I   O   V
 ----------------
 63254  ss      –
 45362  –       –
 65342  s       3
 24563  –       –
 36425  –       –
 64325      –   3
 56324      2   –
 62354  –       3
 46523  2       –
 34265  2       –
 ----------------
6 part, starting every course with 3F.

And here is another reduction that is exactly 1⅔ extents (13440 short of 2
extents).

67200 Bristol Surprise Major
Composed by Graham A C John
 23456  F   I   O   V
 --------------------
 63254  3   ss      –
 45362  3   –       –
 65342  3   s
 24563  3   –       –
 36425  3   –       –
 54623  3       –   –
 34526  3           –
 64325  3           –*
 43625  3       –
 56324  3       –   –
 42653  3   –       –
 62354  3           2
 25364  3   –
 46523  3   –       –
 62543  3   –
 34265  3   –       –
 --------------------
6 part.
*Starting here avoids internal Rounds.

Again, I'm sure that further reductions would be possible, but are unlikely
to be as neat as this.

Graham
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