Free online puzzles

Sliding blocks online

Play sliding blocks right here with Unjam: no sign-up, nothing to install. Pick a difficulty and get a brand-new puzzle every time.

Board size

Sliding blocks every day

Every day there’s one Unjam puzzle that everyone plays, with a leaderboard, streaks and an archive of past days.

How to play sliding blocks

Unjam is a sliding block puzzle: like in a traffic jam, you clear the way for a single block.

Slide the blocks out of the way, then move the yellow block out through the gap on the right. Each block only slides along its length.

Tips

  • Work backward: see what stands in front of the yellow block, then what stands in the way of that block.
  • A long upright block in the yellow block’s row usually has to go all the way up or down. Make room for it early.

Want more techniques? Read the strategy guide.

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