Katachi-Go

Katachi-Go is a colorful 2D and 3D logic puzzle that solves like a 3D Sudoku — every clue you place reveals new possibilities, creating a satisfying chain of “aha!” moments until the board is complete. Use the clues scattered across the board to figure out which shapes belong in each location and how they should be oriented.

Katachi-Go Virtual is its free online companion game. Thousands of puzzles across seven synthwave-styled worlds (one per level, from Low-Fi Horizon to The Final Voyage), each with its own Easy-through-Extreme difficulty setting.

Katachi-Go is like an upgraded digital cousin to Kanoodle, not a copy — a mathematically optimized set of 12 pieces yielding millions of possible puzzles. Every other shape puzzle makes you guess; this one gives you clues, changing the game from "guess-and-check" to a real logic puzzle like Sudoku, but for shapes. Puzzles can start from a completely empty board and still be logically deduced to a specific solution. And now Katachi-Go is available as a real 3D-printed puzzle you can hold in your hands.

Yes, completely free in your browser, no sign-up required, and it works offline once installed as an app on your phone or computer. And the physical Katachi-Go logic game is available for purchase in the Hoffmakers Shop.

Today's Trial is a daily challenge puzzle — the same one for every player, picked fresh each day and reset at midnight. It's a quick way to jump straight into a game without picking a world or difficulty first, and a fun way to compare notes with other players who solved the same puzzle.