Josep A. Buil
2007
Game using the pieces of a tangram at two levels of difficulty, each comprising 8 figures which must be made up with the 7 pieces of the tangram: 1 parallelogram, 1 square, 2 large triangles, 1 medium-size triangle and 2 small triangles.
http://www.xtec.cat/~jbuil/tangram/