You are given a 20x20 board with some black blocking pieces. You place your squares by clicking the top left and bottom right positions for such a square. Squares must be size 2x2 or larger.

A square cannot contain a block.
When you have filled the board this way, the number of squares used should be as small as possible. The right border shows the target and the square counter.
You win when you have placed the required number of squares and no moves are left. If moves are left, you lose.

You can delete an existing square at any time by clicking the same position twice.

Variants:
There are 27 fixed setups and 4 variants with random setups.
The solutions have been found by hand; so you might be able to improve on them.

Please note that there are several alternative piece sets.

Related games: 'Area', 'Area For Two', 'Square Down', 'Square The Square', 'Square The Square II', 'Square Fit'.