Katachi-Go

Katachi-Go is a colorful 2D and 3D logic puzzle that solves like Sudoku, but with shapes — the physical version is a $45 3D-printed set you hold and build by hand.

Katachi-Go Virtual is the free, browser-based version of the same game: 2D only, no purchase required, playable instantly with thousands of puzzles across seven synthwave-styled worlds.

Katachi-Go is like an upgraded digital cousin to Kanoodle, not a copy — a mathematically optimized set of 12 pieces yielding thousands 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. Because no piece may cover another piece’s clue, every puzzle has exactly one solution — so even a completely empty board can be reasoned out through logic, not guesswork. 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.