A one-line game
How straight is your line?
Draw one line between the two pegs. The board shows on the spot where your hand left straight behind.
Your line never leaves this page and vanishes on reload. Reading scale: as if your line were a 30-centimetre ruler.
Press on the board and draw one straight line, peg to peg.
From the keyboard: the arrows move the pencil, Enter finishes the line, Escape clears it. With Shift, the step is larger.
Your line, measured
0/100
- Widest drift
- Mean drift
- Where the hand pulls
How to read the board
The red line is the straightest of them all.
It is the segment between your line's endpoints, like a chalk line snapped on a board. The hatched shade marks where the pencil left it, and the dot marks the widest drift. The millimetres read on a stated scale: what the drift would measure if your line were a 30-centimetre ruler.
The score mixes hand, finger or mouse, browser sampling, and screen size. It is a parlour measurement, not a medical test and no judgment on how you draw.