Our book is very close to release - thanks to everyone who supported the Kickstarter. If you still need to order it then you can do so here:
https://www.kickstarter.com/projects/...

This is a RIDICULOUS sudoku puzzle. The computer needs about 50 sequential "guesses" to solve it and yet it has a logical path that human beings can find. This is another incredible achievement from the brilliant jovi_al - it's called Cobra Roll - and you can give it a try at the link below:

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

Rules:
Normal sudoku rules apply.

PS Episode 4 of Simon attempting to play The Witness aired last night. The next episode will be early next week. We'll announce it on Twitter (@crypticcracking).

PPS 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 Heatwave, a set of incredible thermo sudokus by the astrophysicist grkles! (Don't worry you don't need to be a rocket scientist to solve them!) 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 it should be released any moment at these links:

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

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

**************************************************************

▶ 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

▶ OUR NEW THERMO SUDOKU APP IS OUT!◀
AppStore: https://apps.apple.com/us/app/thermo-...
Android: https://play.google.com/store/apps/de...
Steam: https://store.steampowered.com/app/13...

▶ 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