Computer Sudoku Solver Freaks Out!

Today's puzzle is another in the series of sudokus we've been featuring where the world's best setters showcase a brand new classic sudoku technique they've discovered. It's called Boomerang and it's the work of Sam Cappleman-Lynes. As you'll see from the start of the video, the computer solver has no clue how to solve this puzzle logically... can you discover the trick? You can play Sam's Boomerang sudoku at the following link:

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

Rules:
Normal sudoku rules apply.

Sam has also made an extremely clever 6x6x6 set of puzzles. We have released a solution video for this puzzle on Patreon and you can try to solve it yourself 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 We've managed to reach 400,000 subscribers - thanks so much to everyone who has joined us on this journey. We've released a celebration video where Mark and Simon answer community questions here:
   • We Answer Viewer Questions: 400k Bonu...  

▶ 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 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 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