Domino Solitaire

A full double-six set lies across seven columns in Domino Solitaire. Twenty-eight tiles form a descending layout, with one tile in the left column and seven in the far-right stack, and only the bottom tile in each column shows its face. Seven foundation piles wait beside the tableau. Move every domino off the table and onto those piles until all of them end with matching doubles.

How to play?

Place a tile onto a foundation pile only when its left half matches and its right half sits one number higher or lower. Add a domino to the lower end of a column under that same match-and-one-off rule. After a bottom tile leaves a column, the next covered domino flips face up if one remains there. An empty column accepts a double or a grouped stack led by a double. Play ends once all foundation piles finish with doubles that match.