Free endless rare-answer trivia game you play in your browser
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free: $0. Pro: $9.99/month, $69/year, or $149 lifetime (early-bird for first 100 buyers, then $249). Pro covers up to 100 Coach-explained games and 50 scoresheet photos per month.
Not given
Key features
Accuracy scoring based on winning chances
Move labels: inaccuracy, mistake, blunder
No account required for free review
Import games from Lichess or Chess.com
Coach written explanations in plain language
Scoresheet photo to PGN conversion
Suspected mistakes checked twice at greater depth
Solo dives with 7 prompts at 25 seconds each
Scoring by answer rarity from 10 to 100 points
Unlimited dives with no daily limit
Themed packs: Geography, Movies, and Sports
Multiplayer Puffer Party with up to 6 players
1 vs 1 ranked duels with ELO rating
No download required, plays on any browser
Hand-graded answer bank with 1,026 prompts and 35,000+ answers
Progress saves without account required
What makes it different
Honest labeling: mistakes rechecked deeper before labeling
No uploads for free review: analysis runs locally in your browser
Free review never requires account or has daily limits
One-click review for returning users with remembered username
Truly free with no paywall or daily limit unlike the official Krillion game
Rare answers score 10 times more than common answers
Independent game with own question bank and artwork
Ocean-themed depth scoring system up to 7,000 metres
Player suggestions for answers integrated into growing answer bank
Explain My Chess
Krillion Unlimited