About Krillion IO Game

Play, learn and try again

Start with six daily questions, continue with unlimited practice, or create a private battle for 2–8 players. Use prompt search and the answer checker to explore a tricky question between dives. Your profile keeps track of completed games and your strongest subjects.

Our answer policy

We start with bounded questions: a named list, an explicit date range or a rule that can be checked. Every prompt carries a source and every accepted answer has an explanation. The mixed practice set has 36 prompts across six subjects, plus a separate six-question Pixar movie pack. Unlimited means repeated play, not an infinite supply of distinct questions.

Canonical names and explicit aliases are normalized for case, accents and punctuation. Our live validator checks the prepared list; it does not ask an AI model to make a new factual judgment during your round. An absent answer is reported as “not found,” with a route to report an omission.

Where the facts come from

Practice sources include the European Union, NASA, IUPAC, NATO, Jane Austen’s House, FIFA, the US Census Bureau, BIPM and Pixar. The source for a particular rule appears on its prompt page. A reference-version date records the dataset edition; it is not a claim that every reference source is continuously monitored.

Publication and spoilers

Full daily practice sets are published after their UTC day ends. The searchable library contains previously published daily prompts and the public movie practice pack. Prompts may recur in future practice dives, so studying the library can help you recognize a later question. Answers stay collapsed until you choose to reveal them.

Report a missing answer

If a valid answer is missing, use the report button in the checker or during a round. Reports include the question and submitted spelling so the answer list can be reviewed.