Lonpos

"Lonpos (alternately Lon-pos or LONPOS) is a logic puzzle game in which the player must fit a fixed number of beaded game pieces of various shapes, to fill a set area such as a rectangle or pyramid. The shapes used in Lonpos puzzles are similar to the shapes known as pentominoes. Lonpos was named after its creator." Source: Wikipedia, "Lonpos", available under the CC-BY-SA License.