Saturday 10 October 2026 · Knights and knaves · Tough
Kind of thinking: DeductionYukti #1 is a Tough knights and knaves, the puzzle for Saturday 10 October 2026. Yukti, a daily logic puzzle at playyukti.com, gives everyone the same puzzle each day. Here is the puzzle; its route appears here once the free week is over.
The puzzle
Who is lying?
On this island, knights always tell the truth and knaves always lie. Mark each islander. Every mark must be a certain deduction, not a guess.
- Tomas says: “It's not true that exactly 4 of us are knights.”
- Ivan says: “If Ana and I are different kinds, then Tomas and I are different kinds.”
- Leo says: “Tomas is a knight, and Ivan is a knave.”
- Ana says: “Noor is a knave.”
- Priya says: “Exactly 5 of us are knights.”
- Noor says: “Tomas and I are the same kind, and Ivan and I are different kinds.”
In the free week (the past 7 days)
Free to play until Sat 17 October. The route appears here the same day, once nobody can still be playing it.
Play this puzzle