Author: Anurag Sahay
Draw a single continuous loop along the gridlines in the diagram. The numbers in each cell indicate the amount of turns taken on the four nodes around the cell. The path cannot cross or touch itself.
Grid control: To draw a fence click at the cell edge or move mouse along the line holding the button. You can also put auxiliary marks by clicking at cells, edges or nodes. More details about grid control are at the help page.