The Reverse of Killer Sudoku?

Normal sudoku rules apply. A clue outside the grid shows the total of the X number of cells, starting on the OPPOSITE side of the grid, where X is the first cell next to the clue. Cages show their totals.

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In our newest FREE app, in addition to the free pack of puzzles by Prasanna Seshadri (one puzzle of each variant of our existing apps), there is a FREE celebratory pack of 23 handmade puzzles by some of the best in the world. You can also get the new paid pack: DOMINO SUDOKU, a pack of 100 handmade puzzles (40 on launch, 5 added each month for a year) by some of the best constructors in the world.

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▶Credits◀
Music: Tim McCaskey (Guitar) or Lucy Audrin (Piano) or Riffclown plays Mozart's Sonata no 16 ("Sonata Facile"), and Mark’s outro music by Riffclown.
SOFTWARE: Thanks to Sam Cappleman-Lynes and Sven Neumann for their work.
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

[kuraban]

Thanks Mark. This one was indeed slightly more approachable than the first. Maybe some day I'll come up with a variant that will stump you! :) Honored as always, to be featured on the channel, and thanks to you and Simon once again for helping to bring this wonderful community together.

[bellybuster]

Mark's mental gymanstics on R2C1 made me chuckle when the cell sees the 5 and the 46 pair.

[Drakrath]

Looks like mark had a blast making the thumbnail

[Roblilley]

36 can't be 8 cells as 36+8 isn't the secret

[Swisswavey]

14 minutes for me. Fun puzzle. Thanks for sharing it.

[praematura]

Got it in 16:17; I honestly didn't think I'd make it through this puzzle, but I'm glad I did! Really interesting variant.

[ericpraline]

Some very elegant early steps to this puzzle from row 5 onwards (which Mark didn't use).

[stevieinselby]

Another way to look at row 5 is to see that the underlap between the two clues is 11 _and that the underlap must include some or all of the 11 cage_ ... and then you know that the underlap must be *exactly* the 11 cage, which fixes the X digits at either end.

[piarittersporn]

Lovely puzzle. Solving it was a great pleasure.

[BeastModeMaths]

56:04 for me. Absolutely loved this puzzle!

[benjaminrealy]

21:59. Loved the bouncing around I had to do

[clara]

That was a very enjoyable little puzzle

[soulbound]

41.07, i think i had a little trouble with this one, lol. Great puzzle, wonderful solve.

[MarushiaDark]

Would love to see a video of Mark solving all the World Sudoku Championship puzzles.

[DMMydog]

Mark: And for my first trick, I'll do some voodoo and fill in the entire center line. O_O'

[nickatty]

I liked that. Just in that sweet spot of being harder than GAS but within my abilities. I did a slightly different solve making more use of the "what's at this end" of the big numbers with some more pencil marks: not quite as elegant but got me there.

[Swisswavey]

Where has Inspiring Sand gone. Those timestamps were invaluable.

[srwapo]

19:17, I'm SHOCKED I was able to solve this at all, much less this fast, after how big of a hole I dug last time I tried one of these.

[erickehr]

15:38 for me. I think I liked this rule a little more than the normal X-sum rule.

[madtitan]

Can you please solve WORLD sudoku championship puzzles on channel after the tournament.