Select three different tiles by clicking them (clicking a selected tile will unselect it.) Each tile has four properties: shape, color, number, and background. Each property can have one of three values.

Color:

Shape:

Background:

Number: 1, 2 or 3

For each property, the three tiles must have either all the same values, or all different. The more dimensions the tiles differ on, the more points scored for the match.

If you can't see a match, use the "hint" button - it will show a match if there is one. You can then select the hinted tiles to see why they are a match.