Tri, originally conceived in 1972, has finally come to life as a mobile game. Inspired by Marsha Falco’s classic “Set” from 1974, Tri presents players with a fast-paced challenge to identify sets of three cards featuring unique combinations of symbols.

Each card in Tri exhibits four distinct attributes: shape (square, circle, or triangle), color (red, green, or blue), number (1, 2, or 3), and pattern (solid, striped, or empty).

To play Tri, players must quickly identify sets of three cards where each attribute is either all the same or all different. Correctly identified sets are removed from the display and replaced with new cards from the deck. The game continues until all possible sets are found or no more sets are available.

The game's 81 unique cards are presented in sets of 12 at a time. Identifying and tapping on a card allows players to select it. A set consists of three cards that meet the criteria of having either identical or entirely distinct attributes.

When no sets are possible among the 12 displayed cards, 3 additional cards are added. The game concludes when all possible sets have been found or when no more sets are available.

Examples of sets:

Example 1: Same shape, same color, same number, and all different patterns.

Example 2: Different shape, different color, different number, and all the same pattern.

Example 3: Every card is different in terms of shape, color, number, and pattern.