BrainsBreaker provides you with tools to assist in the process of solving the jigsaw puzzles.
In the screenshot you can see an open tray; in this case, we've used it to store temporarily the blue pieces.
Then the tray can be closed (hidden) so you have more room to work on the other pieces.
It also shows the "loupe", a zoom tool that can help you, especially in puzzles with very small pieces.
Apart from the tools mentioned above, the program has many other features to help you in your job: option to see only the edge pieces,
resizing the puzzle on the fly, pins to avoid moving pieces by mistake...