Uploaded August 2026 | Updated September 2026, 2 weeks ago

---

*** TODAY'S PUZZLE ***
An incredible discovery tonight courtesy of Aad van de Wetering who has somehow worked out that, if you place a Necker Cube in a sudoku grid, and add a couple of digits at the vertices then you can create a unique sudoku... This is a STUNNING construction and a delight to solve. One of the all-time classics.

Play the puzzle at the links below:

https://sudokupad.app/3eipqnv8xm

Rules:
Normal sudoku rules apply. Neighbouring digits on the orange line must differ in value by at least 4.

▶ BRAND NEW COMPETITION ON PATREON ◀
Our new competition launched today on Patreon! Solve the nine sudokus to be in with a chance to win! Closing date 20 August. Good luck!

patreon.com/crackingthecryptic

▶ Monday's Stream & BLUE PRINCE: THE FINALE? ◀
You can watch of stream of The Artisan Of Glimmith from Monday at this link (10pm UK time):

youtube.com/live/0rBQjvHPpCE

You can watch our last Blue Prince stream here:
youtube.com/live/vzXeRdtV9sQ

▶ ZETAMATH'S WORM: OUR BRAND NEW APP ◀
We've released a brand new collection of sudoku puzzles by Blobz. The worm features 12 connected sudokus and is a great way to enjoy more creations from this popular constructor:

Steam:
store.steampowered.com/app/4756830/Cracking_the_Cryptic__The_Sudoku_Worm_of_Zetamath
AppStore
apps.apple.com/us/app/cracking-the-cryptic/id1629992934
Android:
play.google.com/store/apps/details?id=com.StudioGoya.CrackingTheCryptic

All our apps can be found at our website with links to all outlets:
crackingthecryptic.com/apps

▶ NEW MERCHANDISE INCLUDING RAT RUN GOODIES ◀
cracking-the-cryptric-shop.fourthwall.com/en-gbp/collections/rat-run

▶ SIMON & MARK ATTEMPT BLUE PRINCE: THE SUDOKU ◀
This new epic (and epically long) video is now on Patreon (as well as our monthly sudoku hunt competition by Sandra & Nala). Check it all out here:

patreon.com/crackingthecryptic

▶ SVEN’S SUDOKU PAD ◀
Input classic sudoku puzzles into our software. With 12 free puzzles:
iOS: apps.apple.com/us/app/svens-sudokupad/id1570622073
Steam: store.steampowered.com/app/1706870/Svens_SudokuPad
Android: play.google.com/store/apps/details?id=com.svencodes.sudokupad
Amazon: Search for “SudokuPad”

▶ CTC FAN DISCORD SERVER◀
discord.gg/BbN89j5

▶ OUR VIDEO CATALOGUE – CATEGORISED WITH LINKS◀
tinyurl.com/CTCCatalogue

▶SEND US PUZZLES TO SOLVE/CONTACT US◀
crackingthecryptic@gmail.com
Snailmail: Mark Goodliffe, Box 102, 56 Gloucester Road, London SW7 4UB

▶FOLLOW US◀
Twitter: #crypticcracking
@crypticcracking
Instagram @crackingthecryptic

▶Credits◀
Music: Lucy Audrin (Piano): Mozart's Sonata no 16; and Mark’s outro music by Riffclown.
SOFTWARE: Thanks to Sam Cappleman-Lynes and Sven Neumann
Logo: Melvyn Mainini
Opening Credits: Burak Mescioğlu

▶ Contents Of This Video ◀

0:00 Intro music and puzzle introduction
1:54 Belamis' puzzle yesterday
2:30 Today's crossword video
2:45 Streaming date
3:50 Patreon competition
4:59 Happy Birthdays
6:59 Rules
7:23 Start of Solve: Let's Get Cracking

#sudoku #puzzle #maths