Klotski
Classic sliding block puzzle. Move pieces to free the large block and guide it to the exit in as few moves as possible.
About Klotski
The goal is simple: slide the red block to the exit. Getting there is anything but. Klotski is a classic sliding block puzzle where you shift a jumble of rectangular pieces around a tight grid, trying to maneuver the large block to the opening at the bottom — in as few moves as possible. Every piece blocks another, so progress means thinking two or three steps ahead before committing to anything.
The puzzles start accessible and grow genuinely tricky. There's no timer pushing you, which makes it easy to pause, reconsider, and try a different approach without pressure. If you enjoy this kind of methodical logic challenge, puzzle games in the catalog have plenty more to explore. Launch Nonogram covers similar ground — deliberate, grid-based, satisfying when it clicks.
Klotski plays well on a phone, but the full grid takes up screen space on larger displays, making it easier to track every piece at once. No account needed; just load it and start sliding.
Look inside
How to use
• Objective: Move the large red 2x2 block to the exit at the bottom of the board • Controls: - Drag blocks with mouse or touch to move them - Click a block to select it, then use arrow keys to move - Use on-screen arrow buttons for mobile - Keyboard shortcuts: Ctrl+R (reset), Ctrl+S (save), Ctrl+O (load) • Game Rules: - Blocks can only slide horizontally or vertically - Blocks cannot overlap or move through each other - All pieces must stay within the board boundaries - Only empty spaces allow block movement • Block Types: - Red 2x2 block: The main piece that must reach the exit - Teal rectangular blocks: Secondary obstacles - Green square blocks: Small moveable pieces • Strategy Tips: - Plan several moves ahead - Use smaller pieces to create pathways - Some puzzles require 100+ moves to solve - Try different configurations using the control buttons
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