Easy Peasy Sudoku Advent (20) - Assorted Sandwiches
(Eingestellt am 20. Dezember 2025, 06:00 Uhr von Richard)
Dieser Sudoku-Adventskalender enthält 24 Varianten, die in meiner Sudoku Variants Series (SVS) enthalten waren, sich jedoch als zu schwierig erwiesen haben, um von einer breiten Masse an Rätselfreunden gelöst zu werden. Ich strebe einen Schwierigkeitsgrad von 1 bis 2 Sternen an und habe auch einige allgemeine und/oder spezifische Hinweise geschrieben.
Assorted Sandwiches
Algemeiner Hinweis:
Wie bei anderen Sandwiches ist es wichtig, die Sandwich-Ziffern und die Krusten-Ziffern zusammenzuzählen, um die Summe der Ziffern zu berechnen, die an den Rändern platziert werden müssen, und um zu ermitteln, wie viele Ziffern die verbleibende Summe bilden, da die Krusten-Ziffern nicht Teil der verbleibenden Summe sein können.
Das Sandwich mit 36 in R1 ist natürlich der beste Ausgangspunkt, kombiniert mit dem Hinweis 35 in C1.
Ich hoffe, dass einige Rätsler nach dem Lösen der Adventsversion das ursprüngliche SVS-Rätsel #303 ausprobieren werden.
Verwende die üblichen Sudoku-Regeln.
Hinweise außerhalb des Gitters zeigen die Anwesenheit eines Sandwichs in der entsprechenden Zeile oder Spalte an. Ein Sandwich hat zwei Ziffern, die als seine Begrenzung fungieren. Der Hinweis ist die Summe aller Ziffern zwischen diesen Begrenzungen. Die Begrenzungen sind die zwei einzelnen Ziffern des Hinweises, in irgendeiner Reihenfolge; 31 außerhalb des Gitters bedeutet, dass die Summe der Ziffern zwischen den Ziffern 1 und 3 (egal in welcher Reihenfolge) 31 ergibt.
Ein Sandwich mit 28 hat beispielsweise eine Gesamtsumme von 28+2+8=38, sodass 7 übrig bleiben. Das können {1,6} oder {3,4} oder {7} sein.
Danach sind die beiden unteren Reihen in Kombination mit C9 die besten Stellen, um fortzufahren.
Sudokupad (no answer check)
Sudokupad (with answer check)
or
Penpa+.
Lösungscode: Zeile 4
Kommentare
am 21. Dezember 2025, 13:00 Uhr von Tobias
Great solution path, beautiful!
am 21. Dezember 2025, 07:27 Uhr von Richard
Thanks for all the comments on the solution code discussion. The suggestions and points of view provide more 'food for thought' for me. :)
am 20. Dezember 2025, 21:23 Uhr von CitrusGremlin
thank you for finishing off with some with solution check on. I do solve the ones I can without it, but having it on is such a handy learning tool.
am 20. Dezember 2025, 21:14 Uhr von SennyK
Hello Richard! I really enjoy your puzzles, I think they are all very interesting and well constructed! As to the solution checking topic - I would like to encourage you to use two different names for puzzles with and without solution checking - this might be the little (sc) on the end of the version with solution check. This would allow you to see how many solves each of the versions get, as puzzles with different names get different solve counters. Just a thought :-)
am 20. Dezember 2025, 16:47 Uhr von mihel111
Lovely puzzle, Richard. And what an interesting topic in the comments about answer check. At first, I was thinking "Why is Richard so lazy he is not providing answer check ?". Now I see the point. And obviously, the debate that emerges. I can see good arguments in both sides. May I also say that the answer check is not the only help man can get. Sven's software also provides the possibility of red-ifying (a Simon word) pencilmarks. All those helps may be considered as cheating, but may also be considered as beginner friendly (the notion of beginner being variable according to the difficulty of the puzzle you are facing). Maybe the solution to resolve this issue is technical. Could it be possible to differentiate final answer check (with a grid full of big digits) and partial answer check ? Could it be possible to allow or not the partial answer check in Sven's software ? Could it be possible for the author of a puzzle to allow or not those helps ? Is it possible that Sven's software granted you with a gold star if you conquer a puzzle without any help, a silver star if you use partial answer check and a bronze star if you use the pencilmark conflict checker ? After all, a solve without any help should be rewarded in some way.
In the actual state of the world, I think the choice of providing an answer check belong to the author. People may like or dislike the choice made. So it is. For the rest, may Holy Sven come to our rescue.
am 20. Dezember 2025, 16:26 Uhr von abihummel
Probably my favorite of this series so far. So smooth!
am 20. Dezember 2025, 15:29 Uhr von Br1312te
Generally, I use solution checking for two reasons:
1) to check if I understood the rules correctly. This usually occurs at the start of a puzzle and after I feel confident about MY internal logic process. I'm just checking the foundations. I don't consider this cheating.
2) to find mistakes. Straight-up, I do consider this cheating. However, 90% of my mistakes are typos or basic scanning mistakes. My enjoyment in variant sudokus drives from the logic intricacies; the more basic sudoku steps I care less about. The reality is that when I have to start over because of a typo, I just don't.
For your puzzle series I did relish the opportunity to practise finding mistakes when they occurred (which I do consider a skill). I think I felt comfortable here to do so because there was the reasonable guarantee of a very high quality puzzle. I do not wish for this to become the standard for all creators, though.
For the puzzles that I design, I do include solution checking. I do enjoy seeing people discover my solve path and enjoying my logic flow (and I hated seeing Mark brute force my puzzles on two occasions), but for the most part, I've had my fun while designing the puzzle. I can make something I enjoy, and enjoy the process of making it, but then it's up to the solver to find their own enjoyment. If that involves guessing, finding mistakes, or checking every step they make, that's up to them.
am 20. Dezember 2025, 14:00 Uhr von Rollo
Ganz toll konstruiert, das flutscht! (Das schönste an der deutschen Sprache ist die Onomatopoesie ... ;-), sagte glum_hippo einmal)
am 20. Dezember 2025, 11:21 Uhr von Klausku
Very nice. After the first steps I was confused until I realized that my normal sandwich solving technique didn’t work.
am 19. Dezember 2025, 18:57 Uhr von Richard
After the comments in the last few days about the use of answer checking, I have provided a link to Sudokupad with an answer check as well. Since not everybody wants to have the chance to use it, there is also the link without it. I still have some reservations about the use of it, since it is now possible for each and everyone to 'solve' a puzzle in a few minutes while guessing. But for the last five episodes of the advent calender, I will use this as an experiment.
