The "Empty Grid" Sudoku

*** Join Simon at 10pm UK time tonight - 90 minutes after this video goes live - for his attempt at The Music Box Challenge in The Witness. Link here:
https://youtu.be/HClxzvx1DQs

*****

We suspect you won't have seen a sudoku like today's ever before. Not even The Miracle Sudoku was quite so sparse. That's right Empty Grid by Jodawo literally has nothing in the grid at all. What is going on?!?! You can play the puzzle at the following link:

https://app.crackingthecryptic.com/sudoku/MLt47676Pr

Rules:
In this puzzle ‘2-digit numbers’ read from left to right or downwards. Box 1 (NW) will contain all the 2-digit square numbers (16, 25, 36, 49, 64, and 81), which may overlap but must be entirely contained within the box. Box 9 (SE) is a clone of box 1, rotated through 180°. In each of boxes 3 (NE), 5 (centre) and 7 (SW), each digit will contribute to at least one 2-digit prime number contained within that box. Box 4 (W) is a magic square, with each row, column, and 3-digit diagonal summing to the same total. In each of box 6 (E) and 8 (S), the two 3-digit diagonals sum to the same number (NB box 6's number may be different from box 8's number).

*** Botaku Bonus Puzzle ***
As mentioned in the video, we have a bonus puzzle today from the brilliant Botaku. It's called Euclidean Sudoku! You can play it at the link below and watch a video of Simon solving it on our Patreon page.

https://www.patreon.com/crackingthecryptic

Play the puzzle here:
https://app.crackingthecryptic.com/sudoku/tMmgPBBP93
SudokuPad link: https://tinyurl.com/4t74y7rs

Rules:
Normal sudoku rules apply. Given two cells which both contain the digit N, the Euclidean distance between (the centres of) those cells must be at least √N times the sidelength of a single cell. In other words, if moving from one such cell to the other takes X horizontal steps and Y vertical steps, then √(X^2 + Y^2) ≥ √N.

▶ 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-sudokupad/id1570622073

Android:
https://play.google.com/store/apps/details?id=com.svencodes.sudokupad

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▶ OUR ARROW SUDOKU APP IS OUT ON ALL PLATFORMS!
Here are the links:
Steam:
https://store.steampowered.com/app/1613680/Arrow_Sudoku/
App Store:
https://apps.apple.com/us/app/arrow-sudoku/id1568407537
Google Play:
https://play.google.com/store/apps/details?id=com.StudioGoya.ArrowSudoku

▶ OUR KILLER SUDOKU APP IS OUT ON ALL PLATFORMS◀
https://apps.apple.com/us/app/killer-sudoku-ctc/id1544165118

https://store.steampowered.com/app/1471910/Killer_Sudoku/
https://play.google.com/store/apps/details?id=com.StudioGoya.KillerSudoku&hl=en_US&gl=US

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▶ OUR CHESS SUDOKU APP IS NOW OUT!◀
AppStore: https://apps.apple.com/us/app/chess-sudoku/id1500654482?ls=1
Steam: https://store.steampowered.com/app/1250560/Chess_Sudoku/
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.ChessSudoku&hl=en_US

▶TRY OUR CLASSIC SUDOKU APP◀
AppStore: https://apps.apple.com/us/app/classic-sudoku/id1488838275?ls=1
Steam: https://store.steampowered.com/app/1188330/Classic_Sudoku/
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.ClassicSudoku&hl=en_US

▶TRY OUR SANDWICH SUDOKU APP◀
AppStore: https://apps.apple.com/us/app/sandwich-sudoku/id1476116705?ls=1
Steam: https://store.steampowered.com/app/1117310/Sandwich_Sudoku/
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.SandwichSudoku

▶SEND US PUZZLES TO SOLVE/CONTACT US◀
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▶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!

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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

Видео The "Empty Grid" Sudoku канала Cracking The Cryptic