
- BGG rank
- BGG #12,888
- BGG rating
- 7.5
ECO: Coral Reef
- 2–4 players
- 30–60 min
- Complexity 1.6/5
- 2022

2004
Rules assistance for Katoiz
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
Katoiz is a board game released in 2004 for 1–4 players, 5 minutes per game, and ages 9 and up. It was designed by Sabine Opstelten and its main mechanics are Set Collection, Modular Board, and Pattern Building.
Katoi or since 2006 Katoiz consists of a 6x6 board build up with tiles. These tiles have 3 characteristics: form (square, triangle or circle), color (blue, red, green, yellow or white) and size (big or small). In the base game you try to make a stack of tiles. To move the tiles around you can move a tile horizontally of vertically if 1 characteristic with the adjacent tile corresponds. To move diagonally, 2 characteristics have to correspond. The rules included with the game have all kinds of variants which mean you can start playing the game with kids 3 years old. You can build up to the full game in several easy to manage steps.
Katoiz supports 1–4 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for Katoiz is 5 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists Katoiz for ages 9 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
Katoiz has a complexity rating of 2.5 out of 5 from BoardGameGeek players, which makes it a medium-light game. The rating reflects how much rules knowledge, planning and decision-making a typical game demands. Expect a longer first teach for heavier games, and use a preparation guide before game night.
Katoiz belongs to these categories: Abstract Strategy, Educational, and Math. Its main mechanics are Set Collection, Modular Board, and Pattern Building. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of Katoiz are: Sabine Opstelten. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists Katoiz as a base game. It can be played on its own with the components in the box and does not require any other title. Expansions, if any exist, add new content or rules on top of it and are listed separately in the catalogue with a link back to this base game.