Rick's 1978 solo LPR.I.P. Rick Wright, keyboardist and co-founder of Pink Floyd. He did some great work over the years, much of which you've probably never heard, and we'll miss him. (Yes, I'm a fan.) Here's a puzzle in his honor that references the title of the band's most famous album:

Changing one letter at a time, and leaving the others in their original spots, can you transform the word DARK into the word SIDE?

D A R K
_ _ _ _
_ _ _ _
_ _ _ _
S I D E

HERE is one solution.

THE ANSWER:

DARK -> DIRK -> DIRE -> SIRE -> SIDE    (and yes, Dirk is a name, but it's also a word for a dagger)

Found a different solution? Please feel free to add it to the comments!