Triad

A classic card solitaire game with a musical twist.

• You can only stack cards, and piles of cards, if their note values are chromatically descending and the suits alternate.
• You can only remove cards in groups of three of the same suit, if they form a major or minor triad.

While definitely not unsolvable, expect a significant difficulty spike if you're arriving from more familiar solitaire games.

Card sounds based on "Card Flip" by f4ngy on freesound.org.