These are the 9356* solutions for this nice puzzle game. The aim of the game is to cover the 10 x 6 grid precisely with the 12 given pieces (which are also called Pentomino). By the first sight we did really not expect it to have more than about a dozend solutions, because by hand it's quite hard to find even one solution :-).
As it turned out, intuition was completely wrong, and in fact this huge number of solutions was already calculated by the British Mathematicians Brian and Jenifer Haselgrove in 1960, using one of the first digital computers. On the web you can also find a nice interactive solver for all kinds of such Pentomino puzzles.
* 2339 without mirrored solutions