Unjam
Slide the wooden blocks aside and free the red one. Every puzzle carries a proven minimum — see how close you get.
Daily challenge
0 day streakUnjam serves one puzzle a day, generated from the calendar date — so the board you play is the same board every other player gets. Solve it before the day is out to extend your streak. Your stats stay in this browser; there is nothing to sign up for.
Next puzzle in . See all daily challenges →
About this game
Unjam is a sliding-block puzzle in a wooden tray. Every block moves only along its own length — the upright ones up and down, the flat ones left and right — and none of them can turn. One block is red, and there is a gap in the right-hand wall on its row. Get it out. Nothing else leaves the tray, so the only way through is to work out which blocks have to shuffle aside, in which order, to open a road that was never there to begin with. What sets this apart from most puzzles of its kind is that every tray has been solved before it shipped. An exhaustive search proved the shortest possible solution for each one, so the par you see is not an estimate or a designer's guess — it is the genuine minimum, and matching it means no one alive could have done it in fewer moves. There are 420 trays across four difficulty bands, from gentle six-move openers to expert tangles that need thirty-eight. Undo is free, reset is free, and a hint will search from wherever you have got to and show you the single best move from there, even if you have wandered far off the shortest line. A new tray arrives every day, easy at the start of the week and building to an expert one on Sunday, with a streak to keep and a par to chase. Drag with a finger or a mouse, or play it entirely from the arrow keys.
Controls
Drag a block along its own axis — upright blocks move up and down, flat blocks left and right.
Keyboard
- Arrow keys move the selected block and Tab cycles the selection.
- Z undoes, H asks for a hint.
How to play
Every block slides only along its length and none of them rotate.
Moving blocks
- Blocks stop against each other and against the walls, and none of them leave the tray — except the red one, which escapes through the gap in the right-hand wall. Your job is to clear a path for it.
- One move is one block shifted any distance in one direction, so sliding a block three squares costs the same as sliding it one.
Par
- Par is the proven fewest moves for that tray, found by exhaustive search before the puzzle shipped, so matching it is a genuine best.
- Undo and reset cost nothing, and a hint will search from your current position and point at the single best move — useful precisely because it works even when you have strayed off the shortest line.
Details
- Category
- Puzzle
- Platform
- Web browser
- Rules
- Full rules
- Resets
- Daily at midnight
- Price
- Free
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