21X
BGG rank
BGG #15,104
BGG rating
6.6

21X

2025

Rules assistance for 21X

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

  • 1–6 players
  • 2–15 min
  • 8+
  • Complexity 1.7/5

Rules assistant for 21X

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.

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About the game

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.

Designers

Publishers

  • Naylor Games

Questions and answers

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.