Puzzle archive

Every past puzzle, still playable. Archive plays don't affect your streak.

Nothing here expires. Every 4Stack that has ever run stays playable, in its original form, from the first puzzle onward — so if you found the site today you can start at #1 and work forward, or dip into whichever days you missed. No answers or category names are shown on this page; picking a puzzle drops you straight into the board exactly as it appeared on the day.

Archive plays are consequence-free. Your daily streak only tracks the puzzle of the day, so replaying old boards can't break it and can't inflate it. That makes the archive the right place to practise — the traps are the part of this game you get better at, and there's no cost to misreading one here.

The marker beside each puzzle tracks your own history — unplayed, in progress, solved, or failed. It lives in your browser, so it follows the device rather than an account, and clearing your browser data clears it.

Stuck on the board you picked? The hints page covers today's puzzle in escalating detail, and every finished puzzle has a full written breakdown on the answers pages — those spoil completely, so save them for after. New to the format? How to play walks through a real board start to finish.

Every puzzle, newest first