TetraVex

TetraVex is a computer game included with the Best of Windows Entertainment Pack.

Gameplay
The player is presented with a grid (by default, 3x3) and nine square tiles, each with a number on each edge. The objective of the game is to place the tiles in the grid in the proper position as fast as possible. Two tiles can only be placed next to each other if the numbers on adjacent faces match. Thus, in the final layout, each tile can only be in one specific spot.