Squaro - puzzle game

Squaro is a free online flash game of the category puzzle games.

Here's a puzzle worthy of Sudoku where you have to find the location of rounds on the corners of a grid boxes encrypted. The principle is simple, but the resolution of the grid is a little less, especially 5 × 5 squares.

Fill or empty the rounds with the mouse. Once you think you have solved the grid, click the Check button.