This is an example puzzle. You can solve it the same way as you would solve competition puzzle, but result never stored. You can reveal an answer for the puzzle by clicking "Show answer" link.

Author: Andrey Bogdanov

Draw a single continuous loop in the grid using horizontal and vertical line segments so that the loop visits every square exactly once. It should not cross or overlap itself. It makes a 90-deg turn at every square with a circle. There is exactly one turn between two consecutive circles that the loop visits.

**Grid control**:
To draw a line press the mouse button at a start cell and move mouse to another cell holding the button.
More details about grid control are at the help page.