Rectangle pentomino puzzle

The twelve pentominoes, every shape five squares can make edge to edge, packed into a rectangle six squares by ten. It is rated impossible because a rectangle gives away nothing but its own four sides, and of the 2,339 ways the twelve fill it, only a few are easy to stumble on. Over three quarters of the pieces' edges are hidden.

Drag the twelve pentomino pieces onto the shadow until the rectangle is filled. Every shape here uses all twelve, with no overlaps and nothing hanging over the edge. The pieces have exactly the silhouette's area, so covering the shadow is the whole win condition.

Browse the rest of the Impossible tangram variations or all puzzles, take a figure apart piece by piece in how to play, or try the daily tangram, which deals one of these shapes a day to everybody at once.