The notebook classic. Take turns joining two dots; close the fourth side of a box to claim it and draw again. When every line is drawn, most boxes wins.
Play the computer at three levels, or a friend on one screen
Three board sizes, from a quick 3 × 3 to a long 5 × 5
Hard knows the endgame: it gives away two boxes to keep the chains
Points for wins against the computer, added up in this browser: 1 on Easy, 2 on Medium, 3 on Hard.
The board needs script to show.
Leaderboards take child-friendly names only. A name is three letters, A to Z, like an arcade high score. Rude, unkind or adult names are refused, and any that slip through are taken down. To report one, email hello@oneappcompany.com.
Your records, best scores, your pet and the three letters you last put on a board are kept in this browser, on this device. A board keeps the letters, the score and when; to stop floods it also keeps a scrambled form of your address, never the address itself.