Game modes
Everything we know about slide puzzles, organised by what you want to do — play a particular size, solve one, turn a photo into one, or read the maths behind why some boards are impossible.
What the 35 puzzle (6×6 slide puzzle) is, who plays it, how long it takes, and why bigger boards become a research curiosity.
What Klotski is, how it differs from the 15 puzzle, the Huarong Dao legend, the 81-move minimum solution, and a strategy that actually works.
A guide to sliding block puzzles: the tile-sorting family (8/15/24 puzzle), the block-escape family (Klotski, Rush Hour), strategy for each, and why the general problem is PSPACE-complete.
A guide to the sliding tile puzzle family: square grids, hexagonal variants, rotation puzzles, and the maths that ties them together.