One stroke. No lifting. No going over a line twice.

Draw every line of the picture in one stroke, without lifting your finger.

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Chalkline on a green school slate, a kite half drawn in white and yellow chalk with dotted lines still to trace

Chalkline drawing complete card with two stars, five lines in two strokes

Chalkline in the Pavement look, one-way chalk arrows on grey tarmac

Chalkline in the Kraft paper look, a hint numbering the first three lines of the way through

Chalkline title screen, a chalk house drawn in one line

How it plays

Chalkline is a one-stroke drawing puzzle. Every level is a chalk picture of dots and lines. Put a finger on a dot and draw over every line without lifting it and without going over any line twice.

It starts gently, with a tick, a triangle and the old house you draw without lifting the pen. Then the pictures grow, and you learn where a stroke has to start. Later chalkboards add arrows you can only follow one way and double lines you have to draw twice. There are 120 drawings on 10 chalkboards.

Draw a picture clean on the first stroke for three stars. Went the wrong way? Go back along the line to rub it out. Stuck? "Show the way" circles where to start and numbers the next few lines.

One stroke

Start on any dot and draw over every line. Lift too soon and the board is wiped.

Find the right start

Some pictures only work from one or two dots. Count the lines at each dot to find them.

Arrows and double lines

Later chalkboards add one-way lines and lines you have to draw twice.

Three boards

A school slate, pavement chalk on tarmac or white pastel on kraft paper. Switch any time in Settings.

Chalkline is made by Partech Systems Limited.