The Killer Sudoku World Record

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*** TODAY'S PUZZLE ***
Philip Newman doesn't only make "genuinely approachable" sudokus! He is also well known for discovering incredibly minimalistic puzzles... like this one! This killer sudoku has the lowest number of possible cages (we believe) - just 6. If you think you can create one with five cages then let us know! It's called Layla and it is, like the song, a masterpiece.

Play the puzzle at the link below:

Rules:
Normal sudoku rules apply. Digits in cages cannot repeat and must sum to the total given.

*** NEW SUDOKU HUNT - CLOSING DATE 20 July ***
A sudoku hunt, Kraken The Cryptic was released on 1 July at 4pm UK time on Patreon. We're already hearing it's a lot of fun (and not too difficult) so do give it a try if you can.

Join us on Patreon for as little as $2 a month to play.

*** NEW GAS PACK: VOLUME 2 IS OUT ***
The new GAS (Genuinely Approachable Sudoku) pack is out on all platforms here:

60 original puzzles by Clover, Bill Murphy and Philip Newman!! Earn party hats and dinosaurs with these brand new puzzles!

▶ 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”

*** ORDER OUR UPCOMING BOOK HERE ***

▶ Contact Us ◀

Twitter: @Cracking The Cryptic

Our PO Box address:

Simon Anthony & Mark Goodliffe
Box 102
56 Gloucester Road
London
SW7 4UB

(Please note to use our real names rather than 'Cracking The Cryptic'.)

▶ 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”

**************************************************************

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▶ OUR BACK CATALOGUE – ALL CATEGORISED WITH LINKS!◀

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▶SEND US PUZZLES TO SOLVE/CONTACT US◀

▶FOLLOW US◀
Twitter: #crypticcracking
@crypticcracking

0:00 Theme music and Layla discussion
4:10 Rules
4:45 Start Of Solve - Let's Get Cracking!

Cracking The Cryptic

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Комментарии

I did set this by hand*, starting from White Room (well, the 7-cage version of White Room) and modifying from there. I don't know for sure that 6 is the fewest cages possible, but as hard as this was to find I haven't even tried improving on it...

*by hand here means choosing where the cages go and what sums they have, making heavy use of f-puzzles + rangsk's solver to check for solution counts and weak cells. As mentioned in some GAS intro recently, I am usually a setting cyborg. ;)

philipnewmansudoku

We need like a picture of Simon drinking tea and a jingle and a card that says "Intermission" all cursive to pop up when he steps out for lunch and football 😂

jkid

dear simon, i understand that in these longer videos it can feel quite daunting to go significant periods of time w/o making what you consider to be progress, but i can assure you as someone who likes to follow along with the logic you present, as well as look for logic on my own, i do not find those parts of the video dull at all! it's fascinating seeing what is going on in your head (what you can articulate of it at least) and in the rare moments where i spot something you've yet to find, it's quite a euphoric experience!
overall, i do wish you'd be less focused on these sorts of thoughts tho, your headspace if full enough trying to solve these insanely difficult puzzles!

dwebb

This puzzle just blows my mind! I solved it in 77 minutes, but out of absolutely nowhere. At some point, the solve path is just too smooth to be realistic and not thinking I am breaking something! But turns out that's right!

Edit: It's amazing that Simon can figure out some complicated logic in it that I haven't thought of, but I would like to show a possibly easier but definitly amazing path after around 59:00 :

1. The main character is r1c8, which is either 7 or 9. Let's call that "X".
2. In column 6, "X" can only go into either r5c6 or r6c6, i.e. box 5, by pure Sudoku.
3. Then because of the 79 pair in row 7, "X" which must appear in the 6-cell 37 cage, must be in either r6c3 or r8c3, i.e. in column 3.
4. Then look at box 1, "X" now is restricted into the 8-cell 37 cage AND box 1.
5. Finally, look at row 4, where can "X" go? By the killer cage, it can't be in r4c123. By point 2 mentioned earlier, it also can't be in r4c456. And by Sudoku, it can't be in r4c89. Hence, the only position that "X" can be is r4c7, which is in a 4-cell 13 cage. Therefore, "X" = 7.
Q.E.D!

I cannot tell you how excited and satisfied I was when I find this logic because the puzzle just collapsed after that! And it was too good to be true so I just triple checked whether this logic was valid! Therefore I want to share this with you and it would by my pleasure if you read to here and enjoy this comment😄

馬善萄

I am pleased with the way Simon speeds up his explanations of certain concepts when he is aware that he is solving a complicated puzzle.

allendracabal

"Green is red, we've proved that". This might be the only place on the Internet where that statement makes any sense. 🤣

Tibrius

Let's Get Cracking: 04:10
Simon's time: 1h41m14s
Puzzle Solved: 1:45:24

What about this video's Top Tier Simarkisms?!
The Secret: 4x (06:30, 06:38, 06:45, 06:46)
Maverick: 3x (07:35, 1:29:11, 1:29:14)
Bobbins: 2x (45:46, 1:14:27)
Three In the Corner: 2x (1:41:56, 1:42:03)
The Raven: 1x (1:04:34)
Scooby-Doo: 1x (1:18:06)
Schrödinger Cell: 1x (1:07:28)

And how about this video's Simarkisms?!
Ah: 32x (05:20, 07:58, 09:01, 16:02, 20:12, 22:09, 29:35, 30:03, 30:39, 32:47, 36:23, 43:36, 47:41, 52:38, 54:15, 55:26, 56:20, 57:10, 1:01:12, 1:12:28, 1:23:35, 1:23:35, 1:27:39, 1:27:39, 1:27:52, 1:29:07, 1:29:38, 1:35:30, 1:35:55, 1:37:40, 1:40:06, 1:40:16)
Sorry: 15x (12:38, 14:57, 18:15, 23:57, 32:09, 40:36, 45:46, 49:01, 58:54, 58:54, 1:04:06, 1:07:05, 1:07:05, 1:16:57, 1:30:09)
Hang On: 15x (20:15, 57:10, 57:10, 1:14:22, 1:15:01, 1:18:53, 1:19:30, 1:24:35, 1:33:01, 1:35:15, 1:39:00, 1:39:38, 1:39:38, 1:42:41, 1:45:33)
By Sudoku: 14x (06:01, 09:46, 12:58, 42:38, 43:07, 53:02, 1:09:42, 1:12:32, 1:33:49, 1:37:24, 1:37:30, 1:37:40)
Pencil Mark/mark: 6x (11:52, 11:57, 34:27, 34:31, 1:12:58, 1:28:35)
Goodness: 5x (43:18, 51:13, 52:38, 1:02:33, 1:35:33)
Surely: 5x (31:44, 31:44, 1:27:24, 1:41:15, 1:43:19)
In Fact: 5x (38:23, 43:57, 1:31:41, 1:39:10, 1:43:14)
Whoopsie: 5x (11:20, 56:35, 56:35, 56:35, 56:35)
Clever: 4x (33:19, 35:23, 1:46:38, 1:47:29)
Obviously: 4x (06:43, 1:13:33, 1:26:17, 1:45:27)
Good Grief: 3x (52:38, 54:55, 1:00:47)
Progress: 3x (22:14, 22:22, 55:12)
Wow: 3x (48:16, 1:08:30, 1:27:03)
What on Earth: 2x (1:04:23, 1:16:34)
Brilliant: 2x (00:40, 00:40)
Incredible: 2x (00:20, 01:31)
Approachable: 2x (00:45, 00:48)
We Can Do Better Than That: 2x (46:06, 1:02:20)
Pregnant pause: 2x (18:15, 20:30)
Let's Take Stock: 2x (1:43:14, 1:45:47)
Apologies: 1x (1:16:04)
The Answer is: 1x (1:01:23)
Out of Nowhere: 1x (1:27:15)
Nonsense: 1x (58:44)
Recalcitrant: 1x (1:29:07)
Naughty: 1x (1:19:17)
Off to the Races: 1x (1:27:10)
Lovely: 1x (57:03)
Extraordinary: 1x (55:04)
Deadly Pattern: 1x (1:08:59)
Shouting: 1x (1:30:14)
Marries Up: 1x (51:41)
What Does This Mean?: 1x (1:18:03)
That's Huge: 1x (42:55)
Nature: 1x (33:51)
Unique: 1x (01:28)

Most popular number(>9), digit and colour this video:
Thirteen, Thirty Seven (38 mentions)
One (223 mentions)
Yellow (91 mentions)

Antithesis Battles:
Low (3) - High (1)
Even (6) - Odd (1)
Row (46) - Column (30)

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!

inspiringsand

I love how he logics out the yellow cell in the 16 cage at about 30:00, when it was way simpler. You can see that yellow must be in the 7 cage, but based on the coloring you can clearly see that it can't be the same as red, so it must be part of the orange domino, and thus plonks it into the left side of the 16 cage.

melaniehall

Not a hope in hell of solving this for me. Bravo Simon. And Mr Newman is a mad genius.

raysouth

Always love watching these. Great to listen in while i do house chores

BeyondHydro

I've only played normal Sudoku (and slowly at that)
Let me say I am AMAZED at these puzzles and really want to give them a go! Maybe starting out a bit easier than this haha

Emmzhl

I made a minor deduction that you did not in the midgame and it completely changed how the endgame looked, some square had to be one of 2 digits rather than one of 3 digits. Because of it, the piece of logic that gave you that 7 gave me a nearby 9 instead. Ended up in the same place of course.
I got to the end of the midgame on my own, then got stuck, so I started watching the video until you had pretty much caught up to where I was. Then any time you said anything I stopped and checked it out. Eventually something twigged and I finished it off, then finished watching how you did it. When I get really stuck I generally go this route. I still mostly solve the puzzle, except for hints from the general direction your thoughts are taking you, which generally are the right directions to go and the right places to look. Less extended frustration for me and more learning better ways to think about things.

lylecampbell

Starting from the end, I was amused and filled with enjoyment of your guitar outro as background music - a little louder than purely background - for your commentary about the puzzle. Going back farther, I noted when you had about 17 minutes left in the video that you still had a lot of cells yet to figure out - and so I knew that there would be (another) breakthrough that would bring the puzzle to a close. Going back earlier, you said that you feared that people don't like watching you work out minute bits of logic that take a long time to think about and then explain - I will assure you that, for my part, I never mind that at all. For one thing, I know that you succeed, and I am quite interested to see how you do it. For another thing, you are not boring when you are working it out, even if you are somewhat silent - you always do explain yourself. And going back to the beginning, what a pleasure to see another one of the truly nerdy puzzles that Philip devises - the GAS puzzles are great, but these are beyond belief. Thanks, Simon - and thanks, Philip. (Oh, and good for you, having lunch and football with your kids on school holiday - that is what memories are made of, not sudoku puzzles!)

emilywilliams