GAS - We're Here to Solve

Here are the URLs for today's 5 GAS (Genuinely Approachable Sudoku) puzzles. Hat times are given as (two hats/one hat). Any correct solution gets you a dinosaur.

Normal sudoku rules apply. Digits on a line must have the same sum within each box the line passes through. (7:00/13:00)

Normal sudoku rules apply. Cells along a line can be divided into connected groups so that every group sums to exactly 10. Groups may not overlap. Digits may repeat along lines. (8:00/15:00)

Normal sudoku rules apply. Each shaded region must also contain the digits 1-9 once each. (7:00/12:00)

Normal sudoku rules apply. Digits along an arrow must sum to the circled total. (8:00/15:00)

Normal sudoku rules apply. Adjacent digits along a green line must differ by at least 5. Digits in cages sum to the indicated value. (8:30/16:00)

***NEW GAS App***
The much-requested and long-awaited GAS app – Genuinely Approachable Sudoku puzzles! Download the free Cracking the Cryptic app and do the in-app purchase for the GAS app.

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All our apps are full of handmade sudoku puzzles by ourselves and many of the best constructors in the world, fully tested and hinted by Simon and Mark!

▶ SUDOKU PAD ◀ Input classic sudoku puzzles into our software. Comes with 12 handmade puzzles from us:
Amazon: Search for “SudokuPad”

▶SEND US PUZZLES TO SOLVE/CONTACT US◀
Mark Goodliffe, Box 102, 56 Gloucester Road, London SW7 4UB

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▶Credits◀
Music: Tim McCaskey (Guitar) or Lucy Audrin (Piano) Mozart's Sonata no 16; outro music by Riffclown.
SOFTWARE: Sam Cappleman-Lynes and Sven Neumann
Logo: Melvyn Mainini

Opening Credits: Joel Blundell

▶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. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

Thank you for watching!
Simon and Mark

[philipnewmansudoku]

I can't believe you've done 500 days of GAS, Mark! Well done! Always a pleasure to watch you solve. :)

[bobbis.]

My favorite day is any day you post a GAS video ❤

[Gonzalo_Garcia_]

500 days of GAS, that's just incredible. I've managed to go back to a sub-20 total time today after a couple bad runs, so I'm happy with my performance.

My times:
1. 3:10
2. 3:29
3. 4:13
4. 3:47
5. 4:17
Total: 18:56.

[dwebb]

POLARITY
thank you for the gas videos, and here's to 500 more days!

[GuilhermeCarvalhoComposer]

Just loved Clover's Killer Whispers, such an elegant way to make those two variants interact. Thanks for all the puzzles!

[emilywilliams]

I always love the GAS days. And I confess that I was laughing at you (sorry, yes, I was) about not seeing the way through the last puzzle. I can't really afford to laugh because I did not see my way through one of the recent GAS puzzles myself (you won't come to it for a while and you will totally nail it, I am certain). But nonetheless ... Thanks as always for all that you do for CTC, Mark. Your enjoyment of these GAS puzzles and all that is going in comes through mightily. And congratulations on the successful Kickstarter!! Hooray!

[tiithendrikpiibeleht]

Amazing puzzles yet again! I love the GAS series so much, thank you!
Times:
2:58
3:16
2:20
5:20
4:52

18:46

[Coyotek]

Puzzle 1 - 4:38
Puzzle 2 - 4:34
Puzzle 3 - 3:41
Puzzle 4 - 5:32
Puzzle 5 - 7:33 (stumbled a bit with the arithmetic before fixing my error)

Total -- 25:58

Fun puzzles, as always!

[MikoKisai]

10 of 10 hats! It did get a little close on the last one, but still more than half a minute left.

New total is 945 hats (497 regular hats, 439 second hats. 9 bonus hats) and 4 dinosaurs.

[justicegaming]

Squeaky Sum Time - 00:13:40 no hats
10-lines - 00:09:05 one hat
Second Law of Thermodynamics - 00:08:40 one hat
Catch Sum Rays - broke puzzle
Killer Whispers - 00:09:13 one hat and this was the best puzzle of the lot - you clearly saved the best for last.

[mariellehoexum]

Puzzle 1 - 4:45 -- 2 hats
Puzzle 2 - 4:30 -- 2 hats
Puzzle 3 - 5:16 -- 2 hats
Puzzle 4 - 5:45 -- 2 hats
Puzzle 5 - 6:24 -- 2 hats

And that is another set of 10. Very fun puzzles. The combination of the whisperline and the cage was fun, and a bit hard.

[GretgorPooper]

5 lovely dinosaurs for me. I'm not a quick thinker, but I'm definitely a thorough one.

[nady]

GAS 496: 6:52
GAS 497: 6:56
GAS 498: 5:01
GAS 499: 9:44
GAS 500: 7:38


9 hats! I'm happy about this score :) and the puzzles were great as always. I'm always waiting for the new GAS videos; they really are my favorite.

[y_prime]

fun puzzles! rules were simpler than last time, nice to see

times:

496: 3:08
497: 3:24
498: 4:19
499: 3:27
500: 4:22

total: 18:32

[bluerizlagirl]

Every so often, one or other of the GAS setters will stretch the definition of "genuinely approachable" just a little bit, with a puzzle that requires you to make full use of everything you (should) have learned from playing GAS every day -- or just sit staring at it in frustration, until you remember *all* the rules! Clover happens to be particularly good at this, and I never fail to crack a smile when I realise what she has been doing. You can fill in the possibilities for the cages up to a point, and you can even get some way using non-repetition and whisper logic, but you still have to be careful to ensure you have taken a line of thinking as far as it will go.

It's kind of the opposite of a "Well, it's all just Sudoku from hereon in -- I don't need to use The Special Rule at all anymore" moment, and a glimpse into the realms of less-approachable puzzles from a safe distance.

[Anne_Mahoney]

My favorite of this set was the last one, Clover's Killer Whispers. Of course it took me 21 minutes, but they were good minutes.

[alienrenders]

GAS 496 - 8:04
GAS 497 - 8:30
GAS 498 - 9:05
GAS 499 - 9:41
GAS 500 - 8:51

Total: 44:11
Really liked the last one. All times under 10m is fairly good for me. These were fun!

[Kelters]

500 GAS. 500K subs. -- A huge Well Done to all involved. Please have plenty of CAKE! 🎂😁

[RichSmith]

I didn't realise how much I was relying on the conflict checker until I started solving these GAS puzzles with it turned off. I so rarely seem to make it to the end without making a careless scanning error at 'speed' that throws my solution off.

I used to tell myself that I had the conflict checker turned on only to catch fat-finger typos on the touch input panel. That's been proved wrong! I guess there's no going back now. I'll just have to get better at not making careless errors. 😂

[harrykeogh]

Another great set of GAS puzzles & congratulations on another big 500 landmark :)