Goal of the game

The goal of the game is to arrange nine scrambled digits (e.g. Figure A) into sequential order (Figure B) by exchanging them.

 

Rule of the game

Tri-Trick has only one simple rule: Any three adjacent digits form a group, which can be exchanged with another group.

For example, as shown below, group 1 can be exchanged with group 2 or group 3.