Lattice Five
Morpion Solitaire — the classic pen-and-paper puzzle for iPhone, iPad, and Mac.
Place a dot, draw a line through five. Every line must use the dot you just placed, and no segment can be drawn twice — how far can you stretch the position before it runs dry? A pencil-and-paper classic (Morpion Solitaire, a.k.a. Join Five), played since the 1970s, still unsolved.
Coming to the App Store.
The classic, exactly
The standard 36-dot cross and the touching rule (5T), with the disjoint variant (5D) and the shorter, fully solved 4T/4D games one tap away. The human record on the classic position stood for 34 years — the machine record is 178. There's room above your best.
A new puzzle every day
The daily challenge deals everyone the same board — a fresh symmetric starting pattern each date, one attempt, one undo per move. Keep the streak alive.
Challenge your friends
Every generated board has a short code — share it and a friend plays exactly your board. No accounts, no server: the code is the whole challenge.
Study your games
Every finished game is a replay: scrub through it, race your best game's pace as you play, and see the openness curve — where your position peaked, and where it died.
Yours, on your devices
One free app for iPhone, iPad, and Mac. Scores and replays stay on your device. No ads, no accounts, no tracking — ever.