Friends
Three ways to play stackoverfun with friends. Each works independently — pick whichever fits the moment.
Race the day
Sweep duel
Sweep all nine puzzles today, then a one-click share button appears on the hub. Friends open the URL and play the same set in the same order. Whoever's faster takes the day.
Go to the hub →
Compare snapshots
Compare codes
A short code summarises your stats — played, won, current streak, achievements. Paste a friend's code (or open their link) to see a side-by-side diff. Nothing else travels with it.
Get your compare code →
Head-to-head history
Rivals
When you answer a friend's per-puzzle challenge URL, save the round to a named rival. Keeps a running tally of who's winning over time — wins, losses, ties, last played.
Manage rivals →