静かなる論理 (Quiet Logic)

Quiet Logic is a real-time deduction game for exactly 4 players which takes around 5 minutes to play. The game consists of 10 cards which have a different number on both sides. Each player is given 2 cards, 1 is placed in the center of the table, and 1 is hidden from view. After looking at both sides of their cards, players decide which sides to place face up on the table and then space them according to some provided principles. When all players are ready, the game begins and the first person who thinks they have determined the hidden card will write down their guess and check the card. The first person to successfully guess both sides of the hidden card wins.