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Double-Nine Deduction

Double-Nine Deduction 2025

Design Jason Chen (II) Publisher (Web published)
9.0 /10
BGG rating
2–4
Players
30–60
Minutes
5
Age
Game page · 0 prints BoardGameGeek

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About the Game

Double-Nine Deduction is a print n' play cooperative deduction game for 2-4 players. The goal of the game is to play 26 dominoes onto a shared player board so that each of the dominoes played connects to an existing domino chain on the board. Players cannot see the faces of their dominoes and must give clues to the other player(s) to help them deduce what's on their domino faces. Clues are simple on the surface (identify eligible pairs of domino ends that have a specific sum or difference), but can lead to some truly satisfying deductive moments. Double-Nine Deduction plays well at all player counts, and is a rare case of a cooperative deduction game that shines at two-player.

—description from the designer

Filed Under

Categories
Deduction Math Print & Play
Mechanics
Communication Limits Deduction
BGG ratings
1
BGG data
refreshed Sep 6, 2026