Thank you for playing my puzzle! I am glad you liked the break in! It was very hard to set this puzzle, ensuring that a solution is actually possible. I had to use some programming to make it work, but i think the end-product turned out great! You definitely made my day 😉

I'm still getting used to thinking about sets in these sudoku puzzles, but after a few hours I cracked it out pretty quickly after getting a hint that I should be thinking about sets more, another wonderful video!

I didn't find the elegant break-in (Simons 9th digit), but I heavily used the extra 3x3 regions the symmetry provides. Simon did not need them but they would have made some deductions simpler even for him. The 3x3 region between R3C3 and R5C5 is an extra region containing 1-9, same with 3x3 region between R4C5 and R6C7, also containing 1-9 (just mirror images of box 1 and box 6 within the red and blue symmetry, respectively).

I needed this today. Feeling a bit yucky. Simon’s enthusiasm always cheers me up!

That first digit (ignoring the 'easy' 5s) is fantastic

Thanks for playing this one. It had a super cool break in!!! What a smart puzzle! 😎

26:44 finish. A very tricky break-in, but a nice flow once inside. Two things I did to assist in my solve were to use the set theory with rows 1-5 and columns 5-9, minus boxes 1 and 9, and to map out the overlapping cells between the two disks. The set I didn't use until later on, to determine the 2-8 pair in box 4, and to check for multiple 7s. Not necessary, clearly, but I was at least able to use it. Excellent puzzle!

The 2 pencil mark in box one 'hiding' the 689 triple!

I love it when Simon co-ordinates his clothes with the colours he uses in the puzzle.

@42:18 Yelling at the screen when Simon highlighted the 3 in box 1 (the only possible place for it).

I finished in 189 minutes. This was such a hard puzzle. I kept falling into many pit traps and messed up. I was very happy when I noticed that the pair of digits that weren't used in the blue side on row 5 had to be in the red side on row 5. This lead to identical digits being in the red side on row 1, giving r1c1&6&7&8&9 to be identical to the digits in the initial blue side of row 5, including 5. That finally helped me finish after ruling out a crucial 7 in the center box. Great Puzzle!

Very clever. As usual, a break-in involving SET eludes me. I got the seven 5s and the 3, and from the 3 I figured out that the 7 in c4 had to be in b8, fixing the 15-cage as a 6-9 pair, but that was as far as I could get on this one.

Will Simon get to color today? Let's tune in and find out!

Absolutely loved it!

Nice design , glad to see there was a nonset method solution. Took a long while. Whats interesting that all the failed branches went to the same sinkhole(contraction): Same 10domino appeared on both sum17 and it Rot-image ...which was a hard contradiction to see. Mystart: 1) same for 5s(and 3) 2) took a while to see but there are sum20blocks that have rot-images. 3) this was the key: using sum15 w sum20block crreates ur 1st 10domino. 4) coloring and sudoku for that 1st 10domino led to some nice deductions to almost complete that domino 5)colorong the other 3 pairs with the rot-image rule. With a deduction from B5 eliminated the other 3 branches.

I actually figured out exactly how this was set from watching the video. Very very beautifully, with a lot of patience.

Actually you don’t need that the circled cells are part of the disc. You can infer that the circles have to be fives without reflecting the cell onto itself. For the upper disc, you can see that the cells outside box 1 have to add to 80, and because the 2 by 2 boxes in the upper left and the lower right corner of disc 1 map to one another everything else has to add up to 40. But the remaining 8 cells map to the 8 cells in box 1 excluding the circled one. Hence, the circled cell is indeed a five. And a similar argument works for the second disc.

This rotational constraint is good. An interesting variant on the XV rule

Saw the break in as at about the 17:00 minute mark and had to pause and solve for myself. Thanks for the nudge Simon! Absolutely brilliant puzzle!

I did a whole thing with this one, coloring all the complimentary squares. That... made it much harder to consider the set theory aspect. By the time I had, I'd worked out so much, that that 2 it deduces spread like wildfire all over the grid. It was fun! But a lot slower.

I love Your channel so much, Simon! It's my daily dose of antidepressants in this hard times. And I learn to be a better Sudoku Player and keep my brain cells fresh and busy 😀(hopefully). This puzzle was great to solve, even though I was stuck after setting all the possible Fives in the beginning. But seeing the coulouring arround 17:00 minutes in the video I had my Ah! effect and was able to solve it. Thank You for this wonderful puzzle!

This was a very interesting puzzle! I wish I'd stuck with it a little longer before turning to the video for hints on the break-in, because it was very clever and I'm sure I could've got it eventually!

33:38 I took a slightly circuitous route playing with the first found 3 for a while before spotting the SET breaking, but combined the rotating disks made for a lot of logical assistance.

Fantastic puzzle and a great solve, but please, please, please, please remove the coloring when it becomes obsolete. Also suggest that a black outline around the two 5x5 boxes would help. It was very hard to see the dotted lines.

I really enjoyed this puzzle. I got the first 8 digits, and some extra pencilmarks (the 3 not being in the red disk in column 2 forces the 7 in column 4 out of the red disk, and similarly in rows 6 and 4 with the blue disk), but needed to watch until you revealed the "Aad trick" before I could continue. Then the extra pencil marking helped, and the rest of the solution flowed nicely.

I read the comments a bit, as I was very confused about the ninth digit. Then set theory came as an option, and it flowed very fast from there. Beautiful puzzle! I got it in half an hour, but without the hint, I would never have done it at all... ^^'

the set theory to get the 2 was quite nice. I wouldn't've solved it very soon if I hadn't watched the video for that bit.

A bit of very nice logic that Simon missed which could have helped a lot (definite spoilers): The 2 in r2c1 eliminates the pencilmarked 2 in r1c3, which forms a 689 pair in box 1. This gives the 3 in r2c3 right away! It also then gives a 7 in r4c3, forming a 1248 quadruple in box 4, which gave me the idea to go down a different solve path than Simon: the 14 pairs can be colored and this resolves them a lot earlier. Not sure if this was the intended solve path, but with the 1248 quadruples showing up everywhere and the way it played out, it sure felt like it - it was so smooth and elegant. Awesome puzzle!

I was able to start without set by getting a couple 4s and 6s. I looked at the impact of the 3 in the 8-cage. It rules 3 out of column 2 in disk 1, so 7 is ruled out of column 4, so 7 is in the leftmost column of box 8. Thus, the 15-cage is a 69-pair. Using the 3 still, I can put a 7 in the top row of box 4 in the first disk. This means that that the 17-cage needs a 6, and you can start to see where 6s and 4s are possible in the two disks.

I found some roping in the central rows during the solve which made me very excited

Isn't it possible to right out the gate shade or letter mark identity relationships between r123c1 and r567c9, since they're the 10-sum complements of the same digits in the overlap? Seems like a low-hanging fruit kind of "could be helpful later" early deduction...

BTW: You can pronounce Lörting like "hurting" in English with an L instead of the H 😁 Or like "alerting" without the A. Interesting... English has a lot of Ö sounds.

Not sure whether anyone has said this, but it's much quicker at c24m if you realise that the 180 degree rotation of Box 1 also contains the digits 1-9. Just leaves six green and six black squares, allowing you to fill in 269 and 158 straightaway as there is only one possibility for the 13 'cage'

One bit of logic which would have simplified the end of the solve is that the central rows/columns of the “disks” contain a 5 and two pairs of numbers which sum to 10. This means that the remaining 4 cells in each must contain two pairs of numbers which sum to 10. This would have got rid a lot of your pencil marks as being impossible.

at 37:11 we have 78 pair in box 2. So the left side of box 2 does not contain 78, and the corresponding rotated rectangle does not contain 23 . This gives you some digits.

Wonderful puzzle.

I think the two 5's had to be given digits in this, otherwise it's a little dubious whether or not the rules indicate them being there. If indeed the intent was to make the solver immediately realise that circles have to be 5's, then maybe not a lot of solving value would've been lost by just placing them in the grid as given digits, and it would've definitely cleared up some confusion.

Agreed. Brilliant.

It made me sad, that the final digit of the rotating boxes got ignored and filled later along basic sudoku. Poor 6 😢

37:05 for me. I struggled way too much.

42:40 just after noticing that he was forgetting the upper "disk", and getting those sevens, Simon typically jumped to another topic without tidying up loose ends : in box 2, the 3 is in R2C4/R3C4, thus there is a 7 in R3C2/R4C2 thus R4C2 is a 7.

39:35 if Simon had worked on reducing the top right of the Red cage at this point, he's have the purple digits which would have lead to at least another couple of digits by compliment... I think

41:19 What can it be, Simon asks? Sudoku, of course, as always.

solved this in 88:19, and i would have never solved this if i wouldnt know those center 5's that 2 on the edge and 7 at the top. yes i guess this counts as cheating to watch your video for clues, but i didnt stop the timer and didnt skip trough the video, so a large part of my timer was this video... I LOVED THIS PUZLE

Got a 34:39 finish. Break-in took a while but once I got past that it flowed nicely.

Rules: 06:39 Let's Get Cracking: 07:19 Simon's time: 41m22s Puzzle Solved: 48:41 What about this video's Top Tier Simarkisms?! The Secret: 5x (24:29, 24:51, 25:01, 25:04, 25:10) Three In the Corner: 2x (47:07, 47:09) Bobbins: 1x (10:20) And how about this video's Simarkisms?! Ah: 10x (10:27, 12:28, 13:41, 21:25, 21:45, 21:45, 26:20, 31:19, 37:43, 43:43) Clever: 8x (08:34, 26:53, 38:44, 41:08, 41:48, 48:57, 49:30, 49:30) Sorry: 5x (12:28, 16:31, 19:22, 19:43, 31:51) Hang On: 5x (11:30, 37:28, 37:28, 37:31, 42:39) Cake!: 5x (02:41, 04:16, 04:18, 05:18, 05:55) Weird: 5x (22:13, 29:51, 29:54, 32:15, 40:13) Beautiful: 4x (26:49, 29:54, 32:37, 33:03) By Sudoku: 4x (30:23, 37:11, 40:28, 43:35) Obviously: 4x (10:07, 17:07, 39:07, 41:16) Naked Single: 3x (40:15, 40:21, 46:43) Gorgeous: 3x (32:29, 32:32, 49:19) Pencil Mark/mark: 3x (07:41, 44:15, 48:24) Symmetry: 3x (09:19, 11:00, 18:49) What on Earth: 2x (15:21, 44:01) Nonsense: 2x (25:06, 35:52) In Fact: 2x (14:01, 49:12) Goodness: 1x (07:58) What a Puzzle: 1x (48:39) The Answer is: 1x (32:54) Naughty: 1x (03:01) I Have no Clue: 1x (02:00) Lovely: 1x (05:58) Brilliant: 1x (48:45) Take a Bow: 1x (26:49) Shouting: 1x (03:58) Magnificent: 1x (45:07) Puzzling: 1x (02:24) Let's Take Stock: 1x (45:28) Most popular number(>9), digit and colour this video: Ten (16 mentions) One (71 mentions) Green (20 mentions) Antithesis Battles: Even (6) - Odd (0) Black (15) - White (0) Column (15) - Row (9) 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!

Fantastic puzzle that took me 38 mins to figure out. Very interesting idea!

I got stuck very quickly after starting. I did place a couple 5s in the circles, and cornermark other 5s. Surprisingly, I recalled a theorem about 5x5 and 4x4 sections of the grid, and that allowed me to place another 5 and narrow the pencilmarking of 5s. The top-left diskette had either three or one 5, but it couldn't have only one because the bottom-right 4x4 had at least one. Consequently, the top-left had to have three 5s, and the bottom right needed a second 5, with only one available cell to place it in. As for the 17-cage, I narrowed its occupancy down to two possibilities, and here is where I stand stuck. (I colored in a new 13-cage that's diametrically opposite the 17-cage across the circle.) 10:50 Ahah, thanks to Simon's opening, I was able to do a little more, including filling the 8-cage. 16:10 Another hint-adding the totals in a diskette. I could now do a little more. I've now ruled out one of the two remaining possibilities for the 17-cage. (Later) I slowly but surely finished the puzzle. I was surprised at the roping in the middle horizontal band. Also, I just noticed almost-roping in the lower band, with 2, 3, and 4 rotating. 18:50 Use 5x5 and 4x4 instead. The 5x5 add to 125, the 4x4 add to 125 - 45 = 80. Then subtract off block 9's total to get the sum in the nine cells surrounding the block -- the sum is 35. You have the cages and placed digits, which allow one to place a 2 in R6C9. 41:20 Place 89 in R3C1, then place 3 in block 1 and its counterpart 7.

This was a big old instance of “stare at it long enough and maybe it’ll suddenly fall apart”.

(43:55) "Cmon, crack! Please please please please..." Simon asking for something... 😳

A 3 in column 2 (8 cage) necessitates a 7 in column 4 due to the rotational symmetry of the top box which puts it into box 8 because of the position of the 5 and makes the 15 cage a 6-9 cage. Im not done watching the video so i dont know if he ever sees that logic.

Amazing, so much fun.. no idea why it solves hahaha

I was so relieved when I got to the point where I could stop checking the ten pairs and just do sudoku to the finish… 89:15

A lot of 6-9 pairs with floppies and naked singles

27:15 "right we don't need this coloring anymore do we?" and removes the grey, yet he keeps around the brazilian flag in the bottom right of the grid for the rest of the video >.

The grid was immediately shouting Ard at me, but for some reason I insisted on exploring other options for several minutes. Once I went the set path, the puzzle flowed very smoothly to finish in 31 minutes.

It's always fascinating to see Simon forget basic Sudoku as soon as new rules are invented. Don't get me wrong, I would have never gotten anywhere near as far, but I would have seen the forced 3 in box 1 (and many other digits) a lot earlier.

I actually got the 6-9 pair in the 15 cage quite early, but I had to cheat off Simon to get that 2 for the break in. Amazing setting.

Simon had 1 spot for 7 in box 1 for about 15 minutes, but managed to find a 6 step process to work out that C6R3 was 8 and not 7 bypassing basic sudoku and claiming the brilliance of it (still brilliant, just not necessary to be quite so complicated)

1:29:24 for me. I wasted about an hour quickly making a correct deduction, but then not being able to remember my logic of how I got there, and finding a VERY long way around to some other deductions.

Most insane 2 logic chain. When i saw it i was like nooo way we know that digit

i think we need disclaimers that magic is required for these types of puzzles

After Simon had the coloring breakthrough in Row 6 and cage 17 I paused and thought where 2 might be in Box 4, row 5 and ther ewas only 1 place (R4C2) ans that unraveled the whole sudoku for me. P.s. this is my 1st comment on what I did ever as I never found the "aha" moment until now. Indeed the breakthrough was way above my paygrade but then all went smoothly (for my capabilities)

Good morning from New Zealand!

Just under a day left to get to 1000% backing. Dear The internet, do your thing.

34:36 for me. Beautiful puzzle!

I did this by coloring 6s & 9s and 4s & 1s.

1:32:05 - Took me over 70 minutes to break in, despite working out after about 20 minutes what the secret might be! If I could spot these tricks earlier and be ok at this Sudoku malarkey!

Good evening from Norway

I couldn't understand the rules. A central circle adds to itself - I thought meant instead of adding to 10 by itself, e.g., 1 adds to 1. Which is no information at all. Otherwise, I was immediately thinking 5.

43:12 The square part was fun but I made mistakes in the sudoku part at the end 😢

To be fair, it's not a debut to the channel as Mark solved a puzzle created by Leonhard some time ago

22:22 for me

19:33 for me.

So its like 3d zipper lines with a fixed sum? :) well kinda.

105:37 for me

I think you got side tracked by set theory. That caused you to color a bunch of cells that you never uncolored. I think this caused you to completely miss the intersection of the two 5x5 boxes. You could use that to eliminate/match the three intersected cells with their respective rotations. You didn’t need to do that, I guess, but I think it would have gone faster had you caught that.

i feel the initial placing of 5 was a leap as 5s from box1 can rotate to box 4

bro is fluent in yappanese

sudoku

That initial 2 was gross

If you dont put a 5 in the circle, you need to put it out the circle and another one on the opposite position because of the rotation make 10 rule. Sudoku will make that impossible. At one point there will be 2 fives in a column or box

needed the break in at 28:06 is when I stopped watching got 00:59:57

Sorry, I've been following you since pre-covid. but the length of adverts are too much. I congratulate you on achieving an income but you're being greedy & assuming. Bye.