Object: Find the hidden rectangles.

Click the board anywhere to let the system design a random setup for you.
The 10x10 board is divided into smaller rectangles (plus a few single squares marked by black balls), but all the information of the rectangles is lost. Only their sizes are visible.

Create a rectangle by clicking what you think is its top left and bottom right corner position.
A rectangle must exactly cover two numbers, and these numbers must be the width and height of the rectangle you create.

If you cover more or less than two numbers, you lose. An explanation text for your loss will appear on the lower border of the playing board.

You win when you have filled the board with rectangles.
This does not have to be the design that the system has created for you; other solutions might be possible and will be accepted by the system.

The rectangles are coloured blue, red or yellow (alternatingly).
The colours have no special importance, but they make the finished games look pretty.

Variants:
In variant 2 the black filler-balls are invisible.

Please note that there is an alternative piece set available.