
- BGG rank
- BGG #16,196
- BGG rating
- 6.6
Douro 1872
- 2–5 players
- 15–25 min
- Complexity 1.3/5
- 2018

2025
Rules assistance for 21X
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.
21X is a board game released in 2025 for 1–6 players, 2–15 minutes per game, and ages 8 and up. It was designed by Leo Samson.
21X is an algebraic blackjack game in which most cards have an X in their value, with you getting to choose an integer value for X that makes your card total as close to 21 as possible without going over. What's the best hand you can make when your cards are 24/X and 6-4X? Some cards have fixed values, and others contain an N variable that equals the number of cards you have in front of you.
21X supports 1–6 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 21X is 2–15 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 21X for ages 8 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.
21X has a complexity rating of 1.7 out of 5 from BoardGameGeek players, which makes it a 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.
21X belongs to these categories: Card Game, Real-time, and Math. Categories describe the theme, setting and style of a game rather than its rules. Filter the catalogue by the same category to find similar games when you enjoyed 21X and want something comparable for your next game night.
The credited designers of 21X are: Leo Samson. 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 21X 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.