Logic Masters Deutschland e.V.

RAT RUN 40: The Big One

(Eingestellt am 9. Juni 2026, 03:06 Uhr von marty_sears)



Rules:

AIM OF EXPERIMENT: Finkz must reach the cupcake by finding a path through the maze. The path must not visit any cell more than once, cross itself, or pass through any thick maze walls. As well as moving orthogonally, Finkz may move diagonally if there's a 2x2 space in which to do so, but may never pass diagonally through a round wall-spot on the corner of a cell.

PENTOMINOUS:

  • Fill the grid with the digits 0-9.
  • Divide the maze floor into pentomino shaped regions (groups of five orthogonally connected cells.) Every cell belongs to exactly one pentomino region.
  • Two orthogonally adjacent cells separated by a thick maze wall are in two separate regions.
  • All five cells of a region must be filled with the same digit.
  • Regions that touch along an edge (even through a wall) may not contain the same digit, and must not be the same shaped pentomino (rotations and reflections count as the same shape.)

FOG: Most of the maze is obscured with fog. Correctly filling a pentomino will clear some fog somewhere. No guessing is necessary.

PURPLE PROBES: A purple probe is a diamond shaped device built into a wall between two neighbouring pentomino regions. The digit on the attached circle indicates the total number of cells visited within those two neighbouring regions.

BLACKCURRANTS: If a blackcurrant sits between two digits, one is double the other.

REDCURRANTS: If a redcurrant sits between two digits, one is odd and the other is even.

GRAPES: If a grape sits between two digits, they have a difference of at least 5.

GOLDENBERRIES: If a goldenberry sits between two digits, they are not consecutive (or the same.)

ONE-WAY DOORS: A purple arrow sits between two different digits and points towards the smaller digit. Finkz may only pass through a purple arrow in the direction it's pointing.

ILLUMINATED PANELS: If a floor panel is illuminated with a blue square, it lies on Finkz' path and indicates that a spike in brain activity was detected in response to that digit.

TEST CONSTRAINT: Two cells visited adjacently along the path may never sum to a prime number. (Note: 0 and 1 are not prime.)







Lösungscode: Digits above the grid (from left to right)

Zuletzt geändert am 16. Juni 2026, 11:37 Uhr

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Kommentare

am 5. Juli 2026, 16:06 Uhr von Johan111
Wow what a great puzzle. Didn’t think I could get through it on my own, but after many many hours over many many evenings I did. I thought I must be going mad at the same two places mentioned already before - two is prime and top left corner :) Thanks a lot for the series and waiting for the next Christmas, Marty ;)

am 2. Juli 2026, 06:21 Uhr von halfcentaur
What a beautiful finish to a historically brilliant series of puzzles. I can't believe I teared up multiple times putting numbers into a grid, but Rat Run is art, and like all great art it's not only beautiful, but brings the beauty of the world around us into focus. Thank you Marty, what a gift you've given us.

am 30. Juni 2026, 13:57 Uhr von hampterss
Oh man what an absolutely amazing series this was, and what a banger to finish this on. I can't believe i've cried over Sudoku of all things. This was simply beautiful. Incredible puzzle, incredible series, can't believe it's over already.

am 29. Juni 2026, 15:49 Uhr von Nyxx
<3 <3 <3 <3 <3 <3 <3 <3

am 25. Juni 2026, 17:32 Uhr von cyddrdrd
What an epic finale to the brilliant series! Thanks so much for creating all of these!

am 23. Juni 2026, 06:46 Uhr von Agent
Great series with an epic finale!

am 22. Juni 2026, 18:32 Uhr von SennyK
Thank you very much Marty for this wonderful adventure! :-)

am 22. Juni 2026, 11:57 Uhr von tobi13
Marty, you are truly a gift to this world. Every puzzle in this series has blown my mind in its creativity and beauty more than the last, and absolutely none more so than this gorgeous beast. And to be tied together by such an engaging and rewarding story. You didn't have to make any of this, let alone make it completely free and accessible, but here we are. Rat Run has brought me an indescribable amount of joy each week and I look forward to revisiting the entire series in the coming years <3

am 20. Juni 2026, 01:26 Uhr von Gwannyn
A long solve, but by no means a truly difficult one. The puzzle kept flowing nicely and there was always some deduction to be made without getting stuck for long, making it feel very rewarding despite being a long commitment. Will have to go back and check the earlier ones I've missed as well.

am 19. Juni 2026, 08:44 Uhr von beefyplato
6 hours! this might be the longest puzzle I've done on this site, but I had plenty of fun doing it

am 18. Juni 2026, 23:13 Uhr von JVA
People saying 5* is too easy to be this puzzle's rating

But the truth is, "very nice" is too mean to describe it

am 18. Juni 2026, 22:54 Uhr von Alc4riN
Absolutely stunning. Long - and in the best way. I played for days and could have played this for weeks to come.

This puzzle was never tedious, never unfair. The dynamic fog always just gives you what you need to go on - keeping the decision space tight and focused.

Thank you so much, Marty. Take some rest and I'm sure we'll see more unique, perplexing Sudoku from you in the future!

am 17. Juni 2026, 17:57 Uhr von Blake Saligia
The perfect finale. The best sudoku series I've played. Overwhelming thanks, Marty!

am 17. Juni 2026, 05:55 Uhr von npinguy
A truly stupendous achievement. Both the series, and the last puzzle itself.

An incredible piece of art, creativity, game design.

And to think you did this all out of your love for this concept, and this community.

I am in awe. So blessed to have gone on this journey with Marty Sears and Finkz over the years.

am 16. Juni 2026, 20:26 Uhr von l_ugray
Wow. Congratulations, and thank you! What an achievement. This series has been truly exquisite. I really can't thank you enough for the gift you've given me and all your other solvers!

am 16. Juni 2026, 13:49 Uhr von SlimeIB
Farewell, all the Rat Run series.

am 15. Juni 2026, 17:41 Uhr von apete
What a beautiful finish to an amazing series. Thank you so much for the hours of care you put into creating this collective masterpiece.

am 15. Juni 2026, 13:54 Uhr von ako
<3

am 15. Juni 2026, 07:00 Uhr von JamesMeowriarty
Marty, thank you so much for this serie, it was such a beautiful journey. It took me close to 8 hours to finish this one, and I enjoyed every single minute of it.

am 14. Juni 2026, 22:34 Uhr von Christounet
Outstanding!
I was hoping for a very large grid for the finale and boy, have you delivered !!
Awesome and memorable serie all the way through, both on the logic and narrative aspects.
I hope this will inspire others to create more epic puzzle series, even though this one might remain the best for a long time.
Thanks Marty !

am 14. Juni 2026, 16:04 Uhr von kagiso
Never thought I'd ever get emotional over a sudoku, but this one is it I guess. Over the years I've gotten so invested in the story and looked forward to every puzzle released and seeing how the story progressed. It's sad to see it end but I am ever so grateful to you Marty for making it and giving us endless hours of joy. Thank you!

Zuletzt geändert am 14. Juni 2026, 15:26 Uhr

am 14. Juni 2026, 15:22 Uhr von Nairurian
What a lovely end to the series, but what a shame it’s over.
This puzzle probably took up nearly 1/3 of the time to solve phase 3 combined (11h, but would have been quicker if I’d realised 2 is a prime number sooner than 9h in), and highlights the issue of Logic-masters only having a max difficulty of 5*, many other 5* puzzles are closer to a 1* than to this one.

am 14. Juni 2026, 08:52 Uhr von psams
Thanks Marty, had lots of fun with all your usual tricks - I cannot imagine how many hours you labored over this amazing final puzzle, much less the series as a whole. ... I will await the sequel wherein Elliot's secrets are revealed. Meanwhile, I travelled back to 2020 and created a much less sophisticated 15x15 grid to fill with pentomino shapes and included some sudoku. puzzle 0003Z9

Zuletzt geändert am 13. Juni 2026, 16:27 Uhr

am 13. Juni 2026, 16:19 Uhr von madhupt
Dear Marty,

This has been a phenomenal journey with you and Simon and Finkz and Phinkz. The series itself was very very enjoyable but this grandest finale of all just took everyone’s breath away. These puzzles are masterpieces of art and if ever there will be a hall of fame, these would figure right up there. Thank you my friend for distributing so much joy to the world. I know you will be considerate enough to revive this series and come up with even greater joy to all of us. May God bless you. Thanks again and again and again…

Marty: thankyou very much for this kind message and for following along on the journey over the last couple of years! And really pleased you enjoyed the finale so much. I definitely won't be reviving the series - in my eyes it would completely undermine the ending I have worked towards. Unless something is just being dragged on indefinitely, there has to be an ending at some point, and this was it :) But I will be making lots of other puzzles, if that's any consolation

Zuletzt geändert am 13. Juni 2026, 14:36 Uhr

am 13. Juni 2026, 14:35 Uhr von mariuszdl
Thanks for all the Rat Runs puzzle. This one was quite a monstrous (it took me over 9h), but still an epic finale of an epic series.

am 13. Juni 2026, 12:57 Uhr von MissAmy254
Took me many, many hours and 2 restarts (one due to an incorrect assumption made very early on, the other from a SudokuPad error which wiped my progress about halfway through!) but I enjoyed every second of it.
Congratulations Marty on a simply incredible series. I’m genuinely a bit emotional that it’s over!

am 13. Juni 2026, 11:40 Uhr von Lizzy01
This took me over 7 hours...
Very nice puzzle!

am 13. Juni 2026, 09:10 Uhr von AshBrown
What can i say. Unbelievable. Thank you Marty.

Ps this took me over 10 hours.

am 13. Juni 2026, 08:15 Uhr von Klausku
Well, I finally finished after 7 hours 44 minutes. I had several „???“-moments followed by a cooresponding „aha!“. My Brain almost broke around the upper left corner. Very Marty-esk, I should have seen that coming. All in all this was great fun and a worthy ending to my favourite puzzle series ever.

Thank you so much Marty for creating this everlasting masterpiece. I think I will do them all again.

Zuletzt geändert am 13. Juni 2026, 04:58 Uhr

am 13. Juni 2026, 04:34 Uhr von KelleyCook
Thank you Marty for a great series. I found the last one was so ridiculously hard that usually I would have given up… but it was the very last Rat Run, so I pushed through. I took a few breaks along the way which led to an aha moment about a primality particular sum of numbers during a sudoku dream.

Ended up finishing in 8 hours according to Sudokupad timer, though a day and half in real life. I don't feel bad about that time at all. This whole journey was wonderful.

am 12. Juni 2026, 22:34 Uhr von killinit01
Finished in 4:50. What a beautiful ending to the series. Marty, you are one of a kind. Thank you for sharing your genius.

am 12. Juni 2026, 20:32 Uhr von Lutterot
Thank you, Marty, for the amazing puzzles, captivating story and the humour hidden in the puzzles.

Zuletzt geändert am 12. Juni 2026, 17:49 Uhr

am 12. Juni 2026, 17:48 Uhr von mscha
Oh wow. That was indeed a Big One. (Perhaps a bit too big for my taste.)
I did get stuck a few times, and even started watching CtC for a hint, but did manage to solve it by myself, eventually, without Simon's help.
What a wonderful end to the story!
Thank you so much for taking us onto this epic adventure, Marty! For me, playing Rat Run was on the same level as watching the entirety of Breaking Bad, if not better.
(7 stars for difficulty for me.)

am 12. Juni 2026, 15:45 Uhr von wenchang
6 stars hardness. So difficult and it took me 8 hours to finish. Amazing setting.

Zuletzt geändert am 12. Juni 2026, 14:48 Uhr

am 12. Juni 2026, 14:47 Uhr von hurrdurr
Thank you for creating one the best puzzle experiences out there. Every time I think you can't outdo yourself with the next puzzle, you still manage to do so.
This will most definitely be near the top of my recommendation list for a long time to come.
Congratulations on a fantastic series!

am 12. Juni 2026, 04:44 Uhr von DavidYiGo
CongRATulations (best pun ever) Marty on the grand finale of the series!!! Can't wait to see what you come up with next!!!

am 12. Juni 2026, 02:11 Uhr von karlmortenlunna
Thank you Marty for a fantastic series. All puzzles have been amazing and the finale was just perfect!

Zuletzt geändert am 12. Juni 2026, 12:49 Uhr

am 12. Juni 2026, 01:45 Uhr von BG03
Dear Marty,

It was Simon that introduced me to LMD, but it was your rat runs that made me stay. I joined here exactly one year ago and rat run 1 was one of the first 10 or so puzzles I tried. One year later, this is now my 400th solve - I dedicate this milestone to you.

What can I say about the puzzle. It took me about 6 hrs to do. I enjoyed every moment of it. I would not have attempted it if it wasn't the rat run finale. Expectations were very high and you delivered. That one way gate was diabolical!

I think that solving this set of 42 puzzles should be on the bucket list of every human being. If there was a Nobel prize for logic puzzles, then you deserve to get one.

Take a bow. Thank you.

Marty: thankyou very much for this! Very happy to have played a part in your getting into this hobby :)

am 12. Juni 2026, 01:33 Uhr von misha
Monstrously difficult, but an amazing end to an amazing series.
p.s. I hope to see a print book of this series at some point.

am 12. Juni 2026, 01:21 Uhr von Lykrast
Hehe of course The Big One would have a big grid.

I started on my own but figured I would have trouble with the pentomino logic and thus waited for the CtC video, and holy hell given how long it took them I'm not sure I could have even solved it myself.

Wonderful ending to some of my favorite sudokus, now I wonder what's next.

am 12. Juni 2026, 00:51 Uhr von dzamie
2 hours in and I lost my place... misplaced a digit somewhere and I'm not sure where the path has diverged.

am 11. Juni 2026, 23:46 Uhr von MasterVesuvius
This puzzle has it all, an inspired ruleset, a thematic call-back to the first puzzle, silly interactions between elements and a monstrous demand of deduction by the solver. On top of that, the story telling. 6.5 hours spent in blissful stress and a good time.

This series really went off with a bang! ... wait too soon. RIP Elliot. In all seriousness, thank you Marty for bringing this silly rodent's intellectual journey to us all. I hope I can set like you someday.

am 11. Juni 2026, 23:20 Uhr von Nell Gwyn
What a wild ride this has been, and what an amazing ending to the epic saga!

am 11. Juni 2026, 19:57 Uhr von Beanie
What a fantastic finish to an incredible series of puzzles! You've showcased such creativity throughout with all the different variations and twists on the formula which along with the story elements has made following along with each release a real treat. And in this puzzle particularly I loved the sense of adventure and discovery created by the combination of region building, path finding and fog. The way you always create such engaging solve paths filled with deductions that are challenging, interesting and elegant is wonderful, and I love the bits of humour interwoven into the designs.

I feel quite emotional now that I'm at the end, it was an amazing journey with a beautiful conclusion, and I'm going to miss Finkz and looking forward to her puzzles each week. Thank you for all the work you put in to making such a great series! :)

am 11. Juni 2026, 19:08 Uhr von hamosphere
Just under 6hrs.... absolutely bonkers....

am 11. Juni 2026, 15:49 Uhr von DaniK
Wow what an epic ending to an epic series. I spent like 8 hours on this one but it was worth every second. Thank you for this fantastic series, it brought me so much joy and fun! Absolutely appreciate the effort, dedication and love you put into these puzzles. I think it is about time I get some rat run goodies :)

am 11. Juni 2026, 12:54 Uhr von valeryolympia
When I started making these variant sudokus I never expected I would actually get a bit emotional from solving one of them, hahaha.

Thank you so much Marty for this beautiful series, it's been an absolute privilege that you shared your creativity with so many of us!

Zuletzt geändert am 11. Juni 2026, 12:13 Uhr

am 11. Juni 2026, 10:49 Uhr von Marshal on Mars
What a beautiful send-off to the series, to Finkz, and to our wonderful narrator. The choice of the 15x15 grid here along with the fog of war was perfect for raising the complexity without it becoming overwhelming, making it feel like a proper finale with momentum behind it. The no-prime sums rule along with just the right amount of traditional clues led to a phenomenal time solving.

You've earned every bit of effusive praise you receive.

Thank you for making these puzzles and this story and for sharing them.

Time taken: 4 hours, 55 minutes, 14 seconds
Snacks eaten: 1
Bathroom breaks: 2
Moments of panic thinking I'd broken something: 3
'Aha's: 14
Times eyes welled up reading the conclusion: 2

Until another time..

am 11. Juni 2026, 09:09 Uhr von CarterPotts
Marty,

I only started solving variant sudoku a couple of years ago when I was watching Simon’s solve of one of the Phase 2 Rat Runs (I believe #17: Trapdoors). I got about 5 minutes into the solve before I thought, “Hey this one looks fairly approachable and fun, maybe I’ll give it a go.” After that, I went back and solved all of the previous Rat Runs to get caught up in time before the end of Phase 2. Between Phase 2 and 3, I solved most of your other puzzles because even though there was no Finkz, there was still a whimsy in your puzzles that evoked the same sort of joy and magic that I yearned for, and had come to expect from variant sudoku.

When Phase 3 finally arrived, it delivered on every aspect. It can be hard to wrap up any saga in a satisfying way, but you’ve accomplished that from the perspective of both the story telling and the puzzle solving. I respect when someone knows it’s time for an idea to come to an end rather than milking it to the point of becoming stale. However, I hope that inspiration may strike again some day, and that we may see the return of Rat Run in some way. While these puzzles are unforgettable, I can only hope that with time I have the fortune of forgetting them so that I may solve them once again.

Thank you Marty for bringing me into the wonderful world of variant sudoku! I eagerly await whatever you come up with next!

am 11. Juni 2026, 07:59 Uhr von davidz32z
13 hours and I can't imagine a better way to spend the time! A truly amazing ending to a truly amazing series. Honestly the world feels different knowing it's over, that's a feeling you only get with the best of stories

am 11. Juni 2026, 07:03 Uhr von Samoth
Amazing. There are no other words that can truly describe this puzzle.

am 11. Juni 2026, 06:36 Uhr von Angara
After two restarts, I finally solved it on the third try! The grand finale of a genius series! Congratulations, Marty. And like all fans, I'm hoping for a possible sequel or spinoff ;)

am 11. Juni 2026, 05:26 Uhr von MrRobotMan
Took me 6 hours to get through this beast but I'm so happy I did. I was stuck for an hour before it dawned on me that certain conservative digits do in fact add to a prime. Thank you so much for this incredible series Marty.

am 11. Juni 2026, 05:06 Uhr von nonagon
What an incredible work of art. It is incredible what stories are being told in the medium of sudoku this series has brought many tears to my eyes

am 11. Juni 2026, 04:23 Uhr von zirconia57
What a finale! Even given the sheer size of the puzzle, you managed to make deductions quite different from each others (and finding the path in the center bottom part was quite puzzling), instead of heavy repetitive grinding.

The whole series was a year-long stroke of genius. I'll miss it and I won't forget the enjoyment of solving your sublime creations. Thank you Marty.

(and yes, I found out you made so many other puzzles I haven't done yet, I'll sure have a try!)

am 11. Juni 2026, 02:53 Uhr von Shawn4168
Marty, thank you so much for this amazing series of puzzles. I still consider myself very much an amateur in the world of Sudoku, but the novelty of these puzzles was enticing enough that I had to give them a try. I've managed to work through all 42 of them, not without plenty of mistakes along the way, and some being solved over the course of days or weeks, but I was always able to eventually find the path of logic to the solution. This final puzzle was an absolute joy, even though I got stuck for hours about 1/3 of the way through because I missed something stupid and obvious :)

Anyway, I just appreciate your setting so much. Your puzzles are challenging, but there's almost always that next big "aha" moment that comes along before I get too discouraged to keep trying.

I've made it a point to solve every new puzzle you post here (not just Rat Run), and I'm slowly working my way through your back catalog as well. Thanks for this amazing gift to the community.

am 11. Juni 2026, 00:53 Uhr von dr.Bunsen
This is Finkz speaking.
I considered stopping "The Big One" experiment after 15 hours, but the test subject finally completed the task. He only said, "Thank you, Marty" and almost lost consciousness.

am 10. Juni 2026, 22:22 Uhr von illogicz
Take a well deserved bow Marty. That was phenomenal.

am 10. Juni 2026, 17:30 Uhr von Franjo
Several times when I had finished one of these fantastic puzzles I wrote „This made my day!“ Now I have to use the plural for I needed many hours of two days to find my way - no, Finkz‘ way, of course! So it’s time to say Goodbye, lovely little rat. We will miss you. Thank you, Maze Master, for creating and sharing the best puzzle series ever.

am 10. Juni 2026, 14:59 Uhr von Justalilguy
This is perfection in every regard. The intuitive and fun logic, the sense of adventure and a genuinely good piece of writing that evokes emotions that will stay with you. Thank you so much!

am 10. Juni 2026, 14:08 Uhr von QuiltyAsCharged
I was surprised how emotional I felt as I neared the end of the puzzle, and then again as I read the conclusion to Finkz's story. I couldn't imagine a more fitting final chapter to this outstanding series. Thank you Marty!

am 10. Juni 2026, 12:10 Uhr von blueberrypug
sensational

Zuletzt geändert am 10. Juni 2026, 12:23 Uhr

am 10. Juni 2026, 11:54 Uhr von symbolic23
congrats on finishing this absolutely insane series!! i chose to believe it was all planned by elliot

super random question: did you always know this was going to be a pentomino puzzle (or at least not a sudoku)? when i first saw it i was a little surprised, but i'm more than happy with the result

Marty: great question! I alway knew it was going to be a big grid, and so not a sudoku. I thought for a long time that it would be a fillomino, but in the end there was a reason why that wasn't appropriate. But I wanted something with a similar region building vibe, with lots of local interactions between path, regions and digits. Pentominous ended up being the perfect choice

am 10. Juni 2026, 10:23 Uhr von gasp141424
A piece of art of both puzzle mechanics and storytelling. Thank you for such wonderful series!

am 10. Juni 2026, 09:56 Uhr von RichieRichWalker
Realizing some details going over some older puzzle of the series. Cannot spoil. But wow !

am 10. Juni 2026, 09:49 Uhr von RichieRichWalker
What an amazing puzzle to end the series! I loved the size of it and the long journey it takes you over.

First I want to say to people in doubt, like I was when I was stuck for a good part of the solve, that it's totally doable, there are no errors or mistakes in the rules !

I agree that mentioning in the rules that the grid is 15x15 would be nice (not sure if I used it in my deductions). I also was wandering if the big "dots" at cell intersections were to be considered as walls (in the sense that a region cannot contain a 2x2 with a dot in the middle) which would make sense story wise even though it's not needed for the solve. Like phrasing the rule a bit differently that the pentominos should fill empty space and cannot go through wall features. I don't know...

am 10. Juni 2026, 06:04 Uhr von etoler
What an absolutely spectacular ending to such a brilliant series. When the first couple of puzzles dropped ages and ages ago, I thought they were cute little curiosities and that I would eventually get around to them. Now, two years later, I find myself eagerly refreshing the page every (typically) Tuesday evening to get an early jump on the next puzzle.

I worked on this one off and on all day, made a few bad logical leaps from time to time, and ultimately finished in right at four hours, and I genuinely wish I could've milked it for four more. This was an absolute joy to solve from beginning to end, and I cannot wait to forget how I did it so I can run through it all over again.

Thank you, Marty, for the literal days of joy you've given each of us in following our scientist friend, Elliot, Zoe, and—of course—Finkz for these last two years. (And an honorable mention to Phinx as well, along with Finkz's fellow test subjects from the prequel.) I can't wait to see what madness you cook up for us next.

am 10. Juni 2026, 02:33 Uhr von ufdigga
I've been quietly crying ever since I saw our little friend emerge from the fog. Marty, thank you so much for this incredible gift to the puzzling community.

am 10. Juni 2026, 01:26 Uhr von mang0
An absolutely beautiful ending to this amazing series!! Took me more than 5 hours. Congrats Marty!

am 10. Juni 2026, 00:05 Uhr von Douglass
Marty, I am honestly lost for words.

3h30m solve for me, and it was three and a half hours of pure, ridiculous joy. What a finale. What a banger. What an unbelievable way to end this journey.

I am utterly stunned by your genius — by the imagination, craft, humour and heart you’ve poured into this series, and by the sheer number of masterpieces you’ve given this community. Every time it felt like the series had reached some impossible peak, you somehow found another one.

This wasn’t just a great puzzle. It felt like the closing chapter of a truly epic saga. Thank you for everything.

Zuletzt geändert am 10. Juni 2026, 11:01 Uhr

am 9. Juni 2026, 23:52 Uhr von Enchanter73
5h40m solve and I enjoyed every minute of it. Also the anticipation of seeing how the story will end made me keep going. Then the message at the end made me more emotional than I thought it would because it felt like I have earned it. Thank you for this beautiful story and series.

Zuletzt geändert am 9. Juni 2026, 23:29 Uhr

am 9. Juni 2026, 23:10 Uhr von npinguy
Clarification: Does "Every thick maze wall sits between two separate regions." mean A) "Cells on the opposite side of a walls must be separate regions", or B) "Every wall separates *exactly* two regions.

I think A but wanted to double-check...

Marty: If two orthogonally adjacent cells are separated by a thick maze wall then they are in separate regions.

am 9. Juni 2026, 23:09 Uhr von alexsmart
90 minutes in and only ~25% of the grid filled-in. I think I am going to save this for the weekend.

am 9. Juni 2026, 21:12 Uhr von Dcs
So long, and thanks for all the rats!

am 9. Juni 2026, 20:42 Uhr von Nylimb
That took me almost 5 hours to solve, and I can't think of a better way to have spent the time! Thank you, Marty, for all the fun (and frustration) during the past 2 years.

I wonder if you were partly inspired by The Hitchhiker's Guide to the Galaxy. I notice that there are exactly 42 puzzles in the series, and Finkz's brilliance makes me wonder if she's really the experimenter and the 2 scientists were her subjects, like the mice in Douglas Adams's story.

am 9. Juni 2026, 20:37 Uhr von emoney1374
This series has been above and beyond what any person could wish for. Thank you Marty for all that you do

Zuletzt geändert am 9. Juni 2026, 19:43 Uhr

am 9. Juni 2026, 17:50 Uhr von stranger
Fantastic.
Also, it is not three-colorable)
is it specified whether p-pentominos can eat solitary wall spots?

Marty: it isn't - I thought the rules were long enough and I didn't fancy adding this caveat into the rules. So I decided to make the puzzle solvable without knowing the answer to that

am 9. Juni 2026, 16:07 Uhr von Fool on Hill
Awesome finale!

am 9. Juni 2026, 15:29 Uhr von AwesomePhoenix
Thank you for such a wonderful sudoku series. This was a lovely puzzle to end on.

am 9. Juni 2026, 15:06 Uhr von Atticus837
Marty, you have outdone yourself in every way. What an ending - in every sense. Take a bow!

Is this the greatest series of puzzles ever created? I don't know. It might be...

Is it a true work of art? Unequivocally.

You have found the intersection between puzzle and story and feeling, and sat there so perfectly across 42 puzzles - creating something that not only feels amazing to solve and uncover (which all of the best puzzles should do) but has genuinely changed the world of sudoku forever.

Thank you for 2+ years of entertainment, head scratching, anticipation and joy. I'm sad to think that it's over.

am 9. Juni 2026, 14:41 Uhr von GeorgeTheToad2
Very sad to see the last Rat Run. Will have a go later. This community has been just the best since I found out about variant sudokus just before the pandemic. It has got better and better with so many new variants. The Rat Run mazes are amazing thanks to you Marty. The story has been amazing too, that is why I am sad. Thank you for everything you have given to this community.

am 9. Juni 2026, 13:02 Uhr von Silverscree
Simply: thanks, I've had a great time :)

am 9. Juni 2026, 12:01 Uhr von OldCaptainWZJ
This one took me a long time and I made many mistakes, but I fought through. Thank you Marty for this great series!

am 9. Juni 2026, 11:33 Uhr von LunchEntity
Vitaminz has, let's say, different ideas about what's difficult? That said, this was entirely worth the uphill battle, despite all the times I thought it was absolutely impossible to find a legal path...

am 9. Juni 2026, 11:18 Uhr von Zombie Hunter
Excellent use of the fog to give positive feedback on the proper pentomino placements. A worthy end to a great series

Zuletzt geändert am 9. Juni 2026, 09:18 Uhr

am 9. Juni 2026, 09:14 Uhr von mir85
Thoughts before I start solving:

- The maze is beautiful, even just seeing some of it
- Test constraint is almost opposite of that of the first maze "primer" - such style!
- Feeling rather emotional right now, excited for the puzzle, sad that it is almost over, but also quite content that there is going to be a grand finale
- I think you are right Marty in that the story needs a proper ending. It would probably be less satisfying if it went on indefinitely just to fizzle out one day. Endings are bitter, but maybe also sweet? We shall see.

I'll try to take my time with this one, savouring it. I won't have time to watch Simon's solve today anyway, so no pressure to finish in time for that.

Finally: Thank you Marty <3

am 9. Juni 2026, 09:10 Uhr von Scojo
Congratulations on reaching the end of this incredible saga! It's been a pleasure to solve each and every one of these puzzles, and to follow the twists and turns of Finkz' story. Thank you for all your hard work Marty, now take a well deserved vacation!

am 9. Juni 2026, 04:20 Uhr von jinkela114514
CONGRATS with the 000RUN ID

Zuletzt geändert am 9. Juni 2026, 04:03 Uhr

am 9. Juni 2026, 03:20 Uhr von blackjackfitz
Marty,
I hope that you feel the collective appreciation that we all have for the work you have put into this series over the last two years.
This was truly the perfect way to wrap it up. Not only is the puzzle perfectly challenging and delightfully clever but you also managed to wrap up the story beautifully. You have an uncanny ability to imbue these puzzles with your sense of humor.
What you have done here with this series is without parallel, you have single handedly changed the game. I, for one, am grateful to have been here to see it firsthand. Thanks for everything!

am 9. Juni 2026, 03:13 Uhr von vitaminz
For those intimidated by the 5* estimate, don’t be! It’s certainly BIG and long but it isn’t that hard. And obviously it’s well worth your time.

am 9. Juni 2026, 03:09 Uhr von ViKingPrime
You've come a long way, little Finkz... it's time now to rest.

am 9. Juni 2026, 03:09 Uhr von konklone
I knew you'd get the 000RUN code too! Nice work.

Schwierigkeit:5
Bewertung:98 %
Gelöst:477 mal
Beobachtet:1 mal
ID:000RUN

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