Unblock
Unblock is a sliding block puzzle on a 6×6 board. Each block slides only along its own direction, horizontal blocks left and right, vertical ones up and down. Move the blocks until the red block can slide out through the exit on the right.
How to play
Each puzzle has a par, the fewest moves that solve it; moving one block any distance counts as one move. The level is set by that shortest solution, from 4 to 8 moves at Easy to 16 to 24 at Hard.
- Blocks slide along their own direction only and never pass through each other.
- Moving one block any distance is one move.
- The puzzle is solved when the red block reaches the exit.
Playing on this site
- Drag a block along its track; it settles on the nearest place it can reach.
- Your moves and the par show above the board.
- Hint shows the next move of a shortest solution.
- Your game is saved in this browser, so you can come back to it later.
Techniques by level
Every technique the solver knows, from easiest to hardest. A puzzle's level is the hardest one it needs.
Questions
What does par mean?
Par is the fewest moves that solve the puzzle, found by a solver that tries every position. Matching it means you found a shortest solution.
Can every puzzle be solved?
Yes. Every puzzle is checked by a solver, and Hint always knows a way out from wherever you are.
Is Unblock free to play here?
Yes. Every level is free, with no account and no sign-in.