A Sudoku With 36 Given Digits

This puzzle has 36 given digits - 36!!! And yet it's still exceptionally interesting (and quite difficult) to solve. It's called Patto Patto and it's by the wonderful constructor shye. And, you're right, Simon doesn't seem to know what day it is! You can play the puzzle at the following link:

https://app.crackingthecryptic.com/su...

Rules:
Normal sudoku rules apply.

Bonus puzzle:
Sam Cappleman-Lynes has made an extremely clever 6x6x6 set of puzzles. You can play them at these links (one to our software, one to penpa (which allows you to increase the size of the grids):

https://app.crackingthecryptic.com/su...
https://git.io/JuB3x

PS If we manage to reach 400,000 subscribers then we'll be releasing a video where Mark and Simon answer community questions! Please email us at [email protected] if you have a good question for them :)

▶ MORE PATREON MADNESS ◀
We've just released Loony Tunes, a sudoku hunt themed on the cartoons! You can join us on Patreon here:

  / crackingthecryptic  

▶ SUDOKU PAD - Our New App ◀
You can now input your own classic sudoku puzzles into our software using our new App! The app also comes with 12 handmade puzzles from us and we're also releasing occasional bonus puzzles too. Get SudokuPad at these links:

iOS:
https://apps.apple.com/us/app/svens-s...

Android:
https://play.google.com/store/apps/de...

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▶ OUR NEW ARROW SUDOKU APP IS OUT ON ALL PLATFORMS!
Here are the links:
Steam:
https://store.steampowered.com/app/16...
App Store:
https://apps.apple.com/us/app/arrow-s...
Google Play:
https://play.google.com/store/apps/de...

▶ OUR NEW KILLER SUDOKU APP IS OUT ON ALL PLATFORMS◀
https://apps.apple.com/us/app/killer-...

https://store.steampowered.com/app/14...
https://play.google.com/store/apps/de...

▶ SIMON REACTION BOARD (!) ◀
With thanks to Andrea for creating this :)
https://simonreacts.avris.it/

▶ CTC FAN DISCORD SERVER◀
  / discord  

NEW: Guide To Our Discord Server:
https://tinyurl.com/CTCDiscordGuide

▶ OUR BACK CATALOGUE – ALL CATEGORISED WITH LINKS!◀
https://tinyurl.com/CTCCatalogue

▶ NEW CRACKING THE CRYPTIC MERCHANDISE◀
https://teespring.com/en-GB/stores/cr...

▶ OUR CHESS SUDOKU APP IS NOW OUT!◀
AppStore: https://apps.apple.com/us/app/chess-s...
Steam: https://store.steampowered.com/app/12...
Android: https://play.google.com/store/apps/de...

▶TRY OUR CLASSIC SUDOKU APP◀
AppStore: https://apps.apple.com/us/app/classic...
Steam: https://store.steampowered.com/app/11...
Android: https://play.google.com/store/apps/de...

▶TRY OUR SANDWICH SUDOKU APP◀
AppStore: https://apps.apple.com/us/app/sandwic...
Steam: https://store.steampowered.com/app/11...
Android: https://play.google.com/store/apps/de...

▶SEND US PUZZLES TO SOLVE/CONTACT US◀
[email protected]

▶FOLLOW US◀
Twitter: #crypticcracking
@crypticcracking
Instagram (for how to solve daily clues from The Times): https://www.instagram.com/crackingthe...

▶SOFTWARE◀
Play the puzzle in the video by clicking the link under the video (above). We are building a website which will allow you to enter your own sudoku puzzles into the software and this is coming soon!

▶Logo Design◀
Melvyn Mainini

▶ABOUT US◀
Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships.

Thank you for watching!
Simon and Mark