This Is One Of The Best Sudoku Puzzles Of 2024

*** TODAY'S PUZZLE ***
This is one of those sudokus that teaches you things you already know. We all know how to add numbers together and yet there is something so fundamental and clever about the way that logic is presented by yttrio here that it feels new. The puzzle is called One Look Could Kill and it's absolutely one of the best we've seen this year.

Play the puzzle at the link below:

Rules:
Normal sudoku rules apply. Digits MAY repeat in cages if allowed by other rules. The sum of digits in each cage must be a two-digit number that acts as a valid “look-and-say clue” for that cage. Eg if the sum is 21, there must be exactly two 1s in the cage along with any combination of other digits (such that, overall, the digits in the cage sum to 21). Eg2 if the sum is 17, there must be exactly one 7 in the cage along with any combination of other digits (such that, overall, the digits in the cage sum to 17).

*** NOVEMBER'S SUDOKU HUNT COMPETITION HAS CLOSED ***
November's sudoku hunt competition has closed. The winner is Maddy and we'll be arranging for her to make a video with Simon! December's monthly reward "Swipe Right" arrives at 4pm on December 1st!

Simon's solve of James Sinclair's Thank You Very Much has also just been released.

Check it out for as little as $2/month here:

*** THIS WEEK'S STREAM ***
We're continued our battle with the Caterdokupillar on Wednesday. It's the collection of nearly 200 linked 6x6 puzzles curated by Memeristor! You can watch again here:

*** NEW FOG APP IS OUT ON APPLE (!), STEAM & ANDROID ***
Brand new incredible Fog Sudoku puzzles by the likes of Phistomefel, Marty Sears, James Sinclair, Qodec, Dorlir, ThePedallingPianist, Sandra&Nala, Peter Veenis, Mr Menace, Florian Wortmann, Math Pesto & HalfBakedLunatic.

*** CRACKING THE CRYPTIC APP ***
Our main app (which is itself completely free) contains packs featuring Fog, Domino, Lines, and GAS puzzles, with a few special free sets as well! All the puzzles are hand-crafted by us and some of the best constructors in the world, with hints by Simon and Mark.
AppStore:
Android:

▶ SUDOKU PAD - Use Our Software For Your Puzzles ◀

You can input classic sudoku puzzles into our software and help support Sven, the programmer responsible for the wonderful user interface we all use to play these puzzles everyday. The app also comes with 12 handmade puzzles from us:

iOS:
Android:

ALSO on Amazon: Search for “SudokuPad”

▶ Contents Of This Video ◀

0:00 Intro music & puzzle introduction
1:39 New Sudoku Hunt TODAY
2:36 Try Our New Fog Sudoku App
2:52 Streaming on Thursday
3:08 Happy Birthdays etc
5:57 Rules
8:16 Start of Solve: Let's Get Cracking

▶ Contact Us ◀

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#sudoku #puzzle #maths

[Ytterbio]

Fantastic solve as always by Simon! I'm so glad you found all of the core logic involved (with the 10 and 20 sums), and especially pleased you found the intended Sudoku near the end (the 5/7 pair in row 4). The concept for this puzzle started as I was thinking about other duality-type puzzles that may be possible (insert shameless plug for the recent Skunkworks puzzle pack here), and the thought of the number of a cage being both the sum and a look-and-say clue came to mind. As I thought about it, I realized all the points you discussed while solving, and started wondering if I could take that concept and make it so the actual total was initially unknown for every cage. I was incredibly delighted when I found that this was, in fact, possible!

[biaberg]

«All of the shenanigans involving the nonsense» 😊

[RichSmith]

If I encountered this puzzle anywhere else, say a newspaper or a puzzle magazine, I'd have simply written it off as "stupid fools, they've not printed it correctly". It being CtC, instead I go "ok, no given digits, no cage totals - let's get cracking!"

[RoderickEtheria]

28:50 A 4-cell cage in a single house consists of two low digits, a high digit, and a whatever digit, where the whatever digit is not limited to being a second high digit.

[Akmenrah]

Rasmus from denmark here - what a pleasant surprise! Many thanks for the birthday wishes 😊

[danagritz]

Usually I can follow along with your logic, and see how it is working as you explain it in real time, but something about this one kept breaking my brain. I had to pause and back up several times, and ask myself how you made the deductions. Well done. I am pretty sure I would have taken days to solve it by myself.

[inspiringsand]

Rules: 06:05
Let's Get Cracking: 08:22
Simon's time: 1h2m47s
Puzzle Solved: 1:11:09

What about this video's Top Tier Simarkisms?!
The Secret: 4x (18:10, 18:16, 18:19, 38:57)
Bobbins: 2x (50:55, 1:07:26)
Knowledge Bomb: 1x (25:29)

And how about this video's Simarkisms?!
Ah: 22x (10:19, 13:33, 16:20, 19:01, 20:51, 22:42, 25:44, 29:28, 32:44, 34:24, 34:24, 36:09, 39:23, 40:33, 43:01, 43:01, 49:37, 52:34, 54:25, 56:21, 1:00:56, 1:05:11)
Beautiful: 11x (17:30, 40:51, 46:43, 58:06, 1:00:56, 1:00:56, 1:03:23, 1:05:21, 1:08:55, 1:11:05, 1:12:28)
Cake!: 10x (03:16, 03:18, 03:34, 03:40, 03:46, 03:58, 04:00, 04:12, 04:37, 05:25)
By Sudoku: 9x (27:07, 29:16, 40:57, 42:27, 45:25, 52:12, 1:00:41, 1:09:49, 1:10:29)
Sorry: 7x (18:41, 19:55, 21:13, 26:11, 27:16, 45:36, 46:22)
Hang On: 6x (03:37, 13:33, 15:24, 22:33, 26:59, 31:49)
Obviously: 5x (11:58, 15:14, 29:56, 1:00:15, 1:12:18)
Nonsense: 4x (56:49, 56:51, 1:02:46, 1:10:35)
Ridiculous: 4x (17:33, 46:47, 57:45, 1:04:59)
I've Got It!: 4x (34:24, 34:32, 34:32, 58:12)
In Fact: 4x (09:12, 29:58, 37:26, 1:02:55)
Nature: 4x (14:04, 50:40, 50:43, 1:11:42)
Come on Simon: 3x (44:40, 47:49, 1:07:26)
What Does This Mean?: 3x (39:12, 41:04, 59:34)
Naughty: 2x (26:16, 54:29)
Brilliant: 2x (40:54, 43:01)
Gorgeous: 2x (1:05:15, 1:12:14)
Magnificent: 2x (04:07, 34:39)
Uniqueness: 2x (1:03:41, 1:03:44)
Weird: 2x (32:32, 1:02:16)
The Answer is: 1x (59:15)
I Have no Clue: 1x (53:55)
Lovely: 1x (1:09:10)
Hypothecate: 1x (37:33)
Take a Bow: 1x (1:12:35)
Shouting: 1x (05:24)
Shenanigans: 1x (1:10:33)
Surely: 1x (1:03:58)
Phone is Buzzing: 1x (1:07:02)
That's Huge: 1x (46:20)
Pencil Mark/mark: 1x (11:15)
Triangular Number: 1x (09:01)

Most popular number(>9), digit and colour this video:
Twenty (45 mentions)
Two (129 mentions)
Blue (6 mentions)

Antithesis Battles:
Low (39) - High (20)
Even (4) - Odd (1)
Column (16) - Row (13)

FAQ:
Q1: You missed something!
A1: That could very well be the case! Human speech can be hard to understand for computers like me! Point out the ones that I missed and maybe I'll learn!
Q2: Can you do this for another channel?
A2: I've been thinking about that and wrote some code to make that possible. Let me know which channel you think would be a good fit!

[christhecroc]

The cake was enjoyed, although i now fear we'll never sleep! Thank you for the birthday shout-out 😊

[PathOfShrines]

Really great puzzle. Got stuck and had to scroll through the video to get a hint of where to be looking (the top right, of course). I'm happy to say that I at least found the logic for the break-in myself after that --- of course you can "move around the X" to make the 20 sum however you need to. 1:46:44

[alexsmart]

51:59 There was a much easier way to prove that r8c9 was 1. In fact, it had been clear for about 15 minutes (as soon as you put the 1 in r3c7).

The reasoning goes- if you don't have the 1 in the cage, the digits that add up to 10 must be 2, 3, 5 and now you don't have enough digits in the *adjacent* vertical 4 cell cage to put the 2, 3 and 5 it needs.

[MarkBennet]

I got held up coming to this by the monthly reward pack - which is really great this month: loved it. Now an intriguing puzzle without time to try it myself, but I can see some nice things already.

[jonhansen]

My copy doesn't include cage totals :(

[AditaBattleForge]

Fantastic puzzle! The maths is sublime! Thanks Simon and yttrio!

[kosumi]

Oh my, that was a hard one I think, it pays to know all sum combinations by heart. The ruleset was very elegant indeed, and somehow the puzzle kept resisting until the very end. Nicely done!

[wokkawicca]

Holy Toledo, that was hard. I had a thicket of pencil marks, letters, and colors. Took me 3 hours but I never really felt stuck and the logic was a joy.

[GregJonson]

I feel like that title can be applied to at least half of the Sudokus that appear on this channel!

[leefisher]

You're pencil marking [1, 2, 3, 4] as opposed to using a colour for low digits?
WHO ARE YOU, AND WHAT HAVE YOU DONE WITH SIMON??

[Norkas_]

This was fun. Unravelled surprisingly easy after understanding some stuff early on, but it kept being always interesting.

[robertosecco]

The title of this video is spot on. Indeed, one of the best sudoku of the year.

[katiekawaii]

28:45 Why couldn't it have 3 low digits like 1-2-3-5 totaling 11?