Objective:
This puzzle consists of 15 pieces (7 copies of piece A, 8 copies of piece B) [see below]. Arrange the A-pieces flat on the table such that you can completely cover the shape with the B-pieces.

Difficulty:
9 (1:very simple, 10:very difficult)

Materials:
laser cut aluminum pieces in wooden box

Background:
This puzzle is a further development of the puzzles that have been in the exchanges in the last few years. Puzzle designers already have made use of square and hexagonal grids for finding nice sets of pieces for the "cover up" theme. With this puzzle now also the triangular grid is used. Because of the difficulty of the puzzle and the fact of using the triangular grid, the name of this puzzle became "tri(2) cover me" = try to cover me (and "tri" referres to "triangular").

In the next picture you see the 15 pieces outside the box. Here you can see the two different sets of pieces and their shape.

If the main puzzle is too difficult, here are some warm-up tangram-type puzzles. For each one use a subset of the 15 given pieces to lay down the given shape [there is no second layer that has to be done]: