Literature, played in your head.
YOSI is Literature, the six-player card game of asking and deducing, on your phone. Scroll to watch what a single hand asks of your brain.
Nine cards. One glance.
Your hand lands and you sort it by half-suit before you have thought about it. The visual cortex reads the faces; parietal areas keep track of where each card sits.
Most active: primary visual cortex, intraparietal sulcus
Every ask is public.
Who asked whom, for which card, and whether they got it. Nothing is written down. You carry the whole table in working memory while the hippocampus ties each ask to the player who made it.
Most active: hippocampus, dorsolateral prefrontal cortex
A refusal is a clue.
Arun asks Kavya for the queen of spades and comes back empty. Now two players are ruled out. The prefrontal cortex turns what did not happen into what must be true.
Most active: dorsolateral prefrontal cortex, frontopolar cortex
Why did they ask that?
Your partner asks for the nine of hearts. So they hold a heart from that half-suit, and they want you to know it. Working out what others know and intend runs through the temporoparietal junction and medial prefrontal cortex.
Most active: temporoparietal junction, medial prefrontal cortex, superior temporal sulcus
Claim it, or wait.
Once your team holds all six cards of a half-suit, you can claim the book. Name one holder wrong and the book goes to the other side. Orbitofrontal and anterior cingulate cortex weigh the risk against the reward.
Most active: orbitofrontal cortex, anterior cingulate cortex
Measured, not guessed.
YOSI scores how you play, not only whether you won. Each number comes from your own games: the asks, the claims and how they turned out.
- Deduction score
- 68%
- asks made with a reason
- Rating
- 1 842
- Glicko-2
- Wrong claims
- 9%
- of all claims
Deal yourself in.
Free on Android. The iPhone version is on the way.