Daily puzzle (2021-01-02)

Scores

Dutch Snake

Author: Andrey Bogdanov

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Shade some cells black to create a snake of length 45 - a chain of blackened squares which doesn't touch itself even at a point. It should go straight through the cells with white circles and it should make turns in the cells with black circles. The begin and the end of the snake are not given and are subjects to determine.

Example puzzle

Grid control: Click the mouse button at the selected cell to change the filling of the cell. More details about grid control are at the help page.