Life is a Test: A Series of Pony Logic Puzzles

by Brony_of_Brody

The Answer 20

There's several answers to this puzzle, actually. Here is just one of them for your perusal:

ABCD, BADC, BDAC, DBCA, DCBA, CDAB, CADB, ACBD, CABD, ACDB, ADCB, DABC, DBAC, BDCA, BCDA, CBAD, BCAD, CBDA, CDBA, DCAB, DACB, ADBC, ABDC, BACD

Golden_Scroll submitted an alternate solution:

ABCD, ABDC, BADC, BACD, CABD, CADB, DACB, DABC, ADBC, ADCB, BDCA, BDAC, CDAB, CDBA, DCBA, DCAB, ACDB, ACBD, BCAD, BCDA, CBDA, CBAD, DBAC, DBCA

Comments

[Eclipse_Nova]

Thx for putting my answer there

[Another Nopony]

Your "intended" solution fails one of the conditions in its second sequence. You change the positions of all four notes, thus invalidating it immediately according to rule 3.

[Duckgame4life]

ABCD, BADC, BDAC, DBCA, DCBA, CDAB, CADB, ACBD, CABD, ACDB, ADCB, DABC, DBAC, BDCA, BCDA, CBAD, BCAD, CBDA, CDBA, DCAB, DACB, ADBC, ABDC, BACD

Omg
9252993
he's right

[Andy Ray]

Oh, so we might swap more, than just two notes ! I may have been right, after all...