Brain Art Triangular (1995)

From the publisher:

"This ingenious new geometric strategy game combines spatial visualization and free form play to give you a rich, complex gaming experience. Points are scored by forming the corners of equilateral triangles, but just seeing the possibilities may strain your eyes! Who knew triangles could be so much fun?"

Content: 1 red triangle, 48 triangles in two colors

The goal of the game is to build major equilateral triangles out of the own smaller triangles.
The player with the most triangles wins the game.

This abstract game has one red triangle and 24 grey and yellow triangles.

The object is to score points by forming triangles out of one's own pieces. One can do this by placing three at the corners of an imaginary triangle (see examples in the images).

It does not matter whether the complete area of the thus formed triangle contains gaps or pieces from the opponent.