P1: Multiple Chains

[DavidGarfinkle]

P1 can find multiple occurrences through duplicated notes only if the first note of the pattern is the one which is duplicated. For example:

Tenor -- A B C
Bass -- A

Given the query "A B C", algorithm P1 will output:
(A, B, C) -- referring to the tenor line
(A bass, B, C) -- referring to the bass first on the 'A', and then the tenor line for the 'B' and then 'C'

However, in this example

Tenor -- A, B, C
Bass -- C

Algorithm P1 will only output one chain (A, B, C bass) and ignore the alternative chain (A, B, C) which exists only in the tenor.

If finding all possible chains through all voices is desired behaviour for every algorithm, then I think this is fixable but might take a half day or day.