Sudoku for the Chinese New Year

Normal sudoku rules apply. The digits in a cage sum to the number in the upper left corner. Neighbouring digits along a line have a difference of at least 5.

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▶Music◀
Tim McCaskey (Guitar) or Lucy Audrin (Piano) plays Mozart's Sonata no 16 ("Sonata Facile")
▶SOFTWARE◀
Play the puzzle in the video by clicking the link under the video (above). Thanks to Sam Cappleman-Lynes and Sven Neumann for their work.
▶Logo Design◀
Melvyn Mainini

▶Opening Credits Design◀
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

[justsomeguywhoneverdies]

i'm not Chinese but our country do have/celebrate "Chinese new year", and some other Asian contries.
so happy new year

[benjy_]

0:27 "(...) and my wife came to see if I'd hurt myself" : glad to know that your beloved ones care about you and are here to support you. Everyone knows how dangerous sudoku can be at your level!
(honnestly this got me laughing quite hard 😅)

I fell in love with your channel a few weeks ago =) both entertaining and stimulating! Thank you

[aronlide]

Hi, Mark! Thanks for featuring this. :) I was very happy with how this one turned out, both aesthetically and logically. It may be easier than your average puzzle, but easy puzzles can still be a lot of fun. :)
新年快乐!

[wossaaaat]

Viewer in China here. Difficult but not impossible 😉
Thanks Mark and Aspartagcus! Happy CNY to all

p.s. your _'lao hu'_ wasn't bad at all!

[glennmelven]

I can't believe Mark never looked at R3 to see the Xwing on 5s.

[mauveijn]

Lovely puzzle that just keeps on flowing. Finished it in 22:03

[deelkar]

50:12
I need to learn when to switch from scanning whispers to scanning sudoku and back.

[wanderlustwarrior]

14:13 for me. Whew, good sprint! It has been a while since I've solved in under the video length time.

[francescopetracca]

28:34 The most useful "20" cage I've ever seen in my whole life! Great puzzle and, as usual, great solve by Mark, how can you be this fast is beyond me!

[markp]

14:24 finish. I started with the x-wing on 5s in rows 3 and 5, which helped a bit. Happy New Year!

[willieloeffen]

40 minutes. Took me 25 minutes of staring at the grid before I found the break in at row 6. From there on a neat solve with no real difficulties. Fun puzzle!

[stevieinselby]

A nice fun one today, finished in 17:45, although the thing that I was most proud of was colouring the line orange and black instead of orange and blue, for tiger stripes 🐅

[stuffedlegoguy]

18:11 for me! Loved the break in the 6th row.

[timcotton]

Mark, I began the solve much as you did, settling that the 20 cage is 569, the 22 cage 41278. Then I noticed that both rows 3 and 5 required the digit 5 to be only in columns 1 or 9. Since it couldn't be in R5C1 because the 20 cage held box 4's 5, it had to be R5C9, forcing by X-wing R3C1, forcing the 20 cage's 5 to be R5C3. This forced a 5 into R9C2, then R8C5. Those 5s really shortened the solve.

[Swisswavey]

That was a really neat puzzle. Approachable but not trivial. Fun.

[thorns]

Took me 17 minutes during breakfast. A nice little break from all the complicated puzzles lately.

[grahamrskelly]

that puzzle was surprisingly good, All the way through. Happy new year! a great start to the new year.

[therocknrollmillennial]

30:02 for me on this puzzle. I tried to use less help from the video on this one and it affected my solve time a little bit, but not much. This was a fun puzzle! Thank you to the constructor, and thank you to Mark for the solution video! :)

[kevinmorford]

It was along wait for Mark to find the five in column 9. Once he had the 5-6 pair in the 20 cage, that eliminated the pencil marked 5 in row 5 column 1, and required the 5 in row 5 to be in column 9. But I am always pleased on those few occasions when I am able to spot something that is missed by the experts, so thank you for that.

[paco_siu]

20:32 for me, my break-in is actually quite different from Mark's:
I noticed that 5 cannot be placed in the 22 cage since 6 cannot be placed on the GW line, the smallest value I can fit in are 1, 2, 7, 8 and with another 5 the sum would be at least 23, therefore I know that the 5 is placed in the 20 cage with two high digits inside.
So now parity of whole row 6 is found and the sets of GW lines can be correlated. That's how started my puzzle.