
- BGG rank
- BGG #2
- BGG rating
- 8.5
Ark Nova
- 1–4 players
- 90–150 min
- Complexity 3.8/5
- 2021

Rules assistance for Tekhenu: Book of Challenges
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

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Answers come from the official rulebook, with the page to check.
Tekhenu: Book of Challenges is an expansion for Tekhenu: Obelisk of the Sun released in 2022 for 2–4 players, 60–120 minutes per game, and ages 14 and up. Its main mechanics are Variable Player Powers, Variable Set-up, and Open Drafting.
The Book of Challenges contains 3 variants for experienced players, each adding a twist to the normal setup procedure and some additional flavor to the game play. Ancient High-Tech With this setup, each player receives a significant boost in the form of starting Technologies that synergize well with each other and a predetermined Decree. But do not let this powerful beginning trick you into believing that you can take a more relaxed approach to your actions. Quite the opposite! You must constantly stay alert to make sure no action goes to waste. Recommended for experienced players only. Restricted, Yet Flexible Here, you start with a distinctly unique Technology and a flexible blessing. This is countered by only being able to draft a single Starting card. You must exercise great care to ensure that your starting draft offers as much power and flexibility as possible. Of course, the other players will undoubtedly attempt to do the same. Recommended for experienced players only. Wide Open Strategy Powerful and balanced card sets and a much less restrictive Card Market truly opens up the game for a proper battle of strategic minds against each other. Recommended for experienced players only.
Tekhenu: Book of Challenges supports 2–4 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 Tekhenu: Book of Challenges is 60–120 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 Tekhenu: Book of Challenges for ages 14 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.
Tekhenu: Book of Challenges belongs to these categories: Expansion for Base-game. Its main mechanics are Variable Player Powers, Variable Set-up, and Open Drafting. 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 catalogue lists Tekhenu: Book of Challenges as an expansion for Tekhenu: Obelisk of the Sun. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need Tekhenu: Obelisk of the Sun to use it. Check that your edition of Tekhenu: Obelisk of the Sun is compatible, as some expansions were revised between editions.