Tracks (BrainBashers)

Tracks is a route-finding puzzle in the style of the newspaper Train Tracks puzzles. Somewhere in the grid runs one continuous railway line with one start and one end, and it never crosses itself. Some track pieces are drawn in at the start, straights and curves, and the numbers along the top and side say how many squares in each column and row hold track.

Kevin Stone's BrainBashers posts two puzzles, A and B, at every size from 4x4 to 10x10 each day, with a 12x12 weekly special. According to the help page, clicking a square places an unknown piece of track or a cross, and clicking between two squares sets the direction the track takes; once a square has two directions the right piece is drawn in for you. The play page has check, answer, print and restart buttons, an option to show how many track squares remain in each line, an option to show mistakes and an optional clock.

The puzzles change at midnight GMT or at the time zone you choose, and the date list keeps a few weeks of earlier days. No adverts, no account.

It suits players who like Battleships-style counting but want a path to follow rather than ships to place.

Above the grid sit Random easy, medium and hard buttons for extra puzzles beyond the dated ones. On a phone the grid is wider than the screen from 6x6 up, so the row counts on the right fall past the edge.