The Big Yukti, part of Yukti, a daily logic puzzle at playyukti.com, is one shared puzzle a month. Solving each day's Yukti earns you a part for the month's vault and a clue only you hold. Five locks guard the vault, and behind it waits one very tough puzzle for everyone who took part.
How do I take part?
- Solve today's Yukti. Any day this month counts.
- Attach your part on the Big Yukti page. You also get a clue that only you hold, about the puzzle in the vault.
- Parts move the locks along. Each lock appears once enough parts are in, or by its date either way.
- Open the locks. Each one is a different kind of puzzle. When all five are open, the vault opens.
- Work out the puzzle in the vault, with your clues and the tools the locks give.
What are the locks?
Small puzzles with a hidden rule. There's no rulebook: try something, watch what happens, and work out why. When anyone opens a lock, it counts for everyone.
Then take its second turn: the same lock from a new start, with a limit. Do it and you get a bonus clue and 3 points. If you're stuck, each lock has three nudges: questions, not answers, that never give the rule away.
Can I warm up first?
Yes. Each kind of lock has a small warm-up that takes a minute or two, and shows how it worked at the end. Warm-ups give no parts or points, and you can play them as often as you like.
What's in the vault?
One very tough puzzle, new each month. Anyone who earned a part that month can try it, and the first to work it out has their name at the top.
It's open for 14 days, and on the month's last day the answer goes public, solved or not.
When does it all happen this month?
| By | What happens |
|---|---|
| 1 Nov | Lock 1, The dials |
| 8 Nov | Lock 2, The sorting door |
| 11 Nov | Lock 3, The safe |
| 13 Nov | Lock 4, The sliders |
| 14 Nov | Lock 5, The crowd lock |
| 16 Nov | The vault opens |
| 30 Nov | The answer goes public |
Locks can appear sooner, once enough parts are in.
Do I need an account?
No. Your parts and clues are kept with a code made on this device. You only need an email to put your name on the Big Yukti, and that's optional.
Is it a test?
Not a test. Points and clues are for fun, and the puzzle is meant to be very tough.
What does it keep about me?
No name, no email and no IP address. The Privacy page says exactly what, and you can delete your Big Yukti data in Settings.