Ordered Path
One line through every square, meeting the numbers in order.
One line through every square.
Start at the square marked 1 and extend the line square by square, up, down, left or right. Tap a square the line already covers to rewind to it. Every square is used exactly once when you are done.
Start at the square marked 1 and extend the line square by square, up, down, left or right. Tap a square the line already covers to rewind to it. Every square is used exactly once when you are done.
The heavy edges between squares are walls. The line has to go around them, and they are what makes the route findable — without them a grid this size would need a number on almost every square.
The line must reach 2 after 1, 3 after 2, and so on. Reaching a number early turns it red — which is usually the fastest way to learn that a promising route was wrong twenty squares ago.
Drag to draw the line · drag back to rewind · keyboard: arrows + space, Escape clears
Got it — play