champagne, thanks for the 2051 analysis, but it was ronk who questioned it first. Anyway it's nice to know my sanity's not completely gone.

ronk, I've just checked daj95376's three other problem puzzles and find them all to be valid JExocets

The 2 covering lines for each member digit are:

00035 (1234)JExocet:r3c12,r1c7,r2c4 c347 (1)r48, (2)r68, (3)r69, (4)r58

12120 (1236)JExocet:r12c3,r4c2,r7c1 r347 (1)c48, (2)c49, (3)c58, (6)c69

14596 (1236)JExocet:r12c3,r4c2,r7c1 r347 (1)c48, (2)c48, (3)c59, (6)c69

In practice looking for the JExocet pattern first, and only going into deeper analysis if that fails, would cut out the need to consider degeneracy in the base and target cell inferences until it was necessary.

Regarding XSUDO I expected that if you put an entire pattern into it the derived inference it produces would pop out but:

Firstly that must be a bit long winded and make it difficult to pick out what other pattern(s) are being combined with it.

Secondly I didnâ€™t know what would happen if as a result of combining two patterns the same candidate was covered in different ways a multitude of times.