Street 05 › Arcade & Skill Lab › Grid Lock
Grid Lock
Slide the blocks to free the core: 60 sliding-block puzzles in 5 chapters, each checked by a solver, with hints and a fewest-moves rating.
Grid Lock is a sliding-block puzzle game in the style of the classic traffic-jam puzzles. Each block slides only along its length; slide them out of the way so the core can leave through the exit on the right.
There are 60 levels in five chapters, from two-move warm-ups to puzzles that need more than twenty moves. A solver has checked every level, so each one can be solved, and the game tells you the fewest possible moves.
There is no clock. Undo, restart and a hint that shows the next move of a shortest solution are always available. Three stars mean the fewest possible moves without a hint. Progress is saved in your browser.
Quick lesson: Planning backwards from the goal
Start at the goal and work backwards: what is in the core’s way? What must move before that block can move? Following the chain back tells you which block to move first, before you touch anything.
Free to play in your browser. The game opens on this page.