Uploaded July 2026 | Updated September 2026, 2 weeks ago

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*** TODAY'S PUZZLE ***
A debut on the channel tonight for the constructor Jekyll and their puzzle Slide-oku: Penguindrome, which features an incredibly clever new ruleset involving sliding over the grid's ice. We think this video has a lot of things in it: drama, story-telling, a touch of logic, madness, mistakes and catharsis. All in 90 minutes or so... do you agree!?

Play the puzzle at the links below:

https://sudokupad.app/ebemk89tg1

Rules:
Normal sudoku rules apply. Draw a path from the penguin to the shrimp. The ground is covered in turquoise slippery ice. When the penguin starts sliding in a direction it can not stop until it hits an obstacle (a wall or a rock) and stops in the preceding cell. The path can then turn in any available orthogonal direction and continue until the next obstacle. The path can cross itself but not overlap. All coins that are collected along the penguin's path are BLACK KROPKI dots (ie one digit will be double the other). All coins that are not on the penguin's path are WHITE KROPKI dots (digits separated by the dot are consecutive). Not all possible coins are shown. In this puzzle, the penguin's path is a valid PALINDROME LINE (digits along the line read the same in both directions).

▶ 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
3:26 New Patreon content incoming
3:49 Happy Birthdays
6:19 Rules
10:58 Start of Solve: Let's Get Cracking

#sudoku #puzzle #logic