Logic Masters Deutschland e.V.

Sudoku Variants Series (276) - Taxi Ride Sudoku

(Eingestellt am 8. Juli 2020, 00:00 Uhr von Richard)

Für dieses Sudoku-Varianten-Projekt habe ich geplant, jede Woche eine andere Sudokuvariante zu veröffentlichen. Ich werde sehen wie lange es dauert bis mir die Ideen ausgehen.

Taxi Ride Sudoku
Verwende die üblichen Sudoku-Regeln.
Jede Ziffer in einem Kreis ist mit mindestens einer gleichen Ziffer in einem anderen Kreis durch einen Pfad verbunden, der so kurz wie möglich waagerecht und senkrecht verläuft, mit genau der Anzahl von Schritten, die durch die Ziffer selbst gegeben ist. Alle möglichen Kreise sind eingezeichnet.
Der Name bezieht sich auf eine Taxifahrt, die ja auch so kurz wie möglich sein sollte.

Dieses Rätsel ist von Madmahogany inspiriert.

Lösungscode: Zeile 6, gefolgt von Spalte 9.

Zuletzt geändert am 8. Juli 2020, 06:38 Uhr

Gelöst von RockyRoer, dm_litv, rcg, zhergan, Rollo, Statistica, Luigi, sloffie, marcmees, henrypijames, azalozni, Greg, ibag, Senior, Julianl, Yohann, pandiani42, japoorva, SirWoezel, Circleconstant314, zorant, Jesper, Zzzyxas, geronimo92, Narayana, anu_chakravarti, zuzanina, Mody, NikolaZ, ildiko, Thomas Meier, AnnaTh, Madmahogany, bob, r45
Komplette Liste


am 23. Juli 2020, 22:10 Uhr von bob
I found this puzzle intensely difficult but did find a logical path.

am 18. Juli 2020, 14:02 Uhr von Madmahogany
Thanks for the puzzle! Wonderfully made!

am 17. Juli 2020, 16:12 Uhr von AnnaTh

Zuletzt geändert am 13. Juli 2020, 06:36 Uhr

am 13. Juli 2020, 06:36 Uhr von Richard
@emmettcito: If you are able to show me your solution so far, I can check where the problem is. You can write it as a hidden comment or send a pm/e-mail via the forum.

Zuletzt geändert am 9. Juli 2020, 15:01 Uhr

am 9. Juli 2020, 11:46 Uhr von henrypijames
@emmettcito: Generally, when something has gone wrong (and assuming it's the not the puzzle itself), it means we've eliminated something we shouldn't have - because all decisions we ever make are exclusitory, i. e. even an affirmative statement like "A must be X" is in truth just another way of saying "I've either eliminated all other possibilities for A, or for X (or both)".

Therefore, one method I've learned from my school days as a math-olympian is to go over every step in detail and forego the convenient but sometimes deadly trope of "by the same logic" - because what we've hastily dispatched to "the same logic" do not always obey it equally.

So, instead of saying "I'm ruling out A, B, C and D for X", spell out the examination in its full form: "I'm excluding A because firstly ..., secondly ..., thirdly ...; then I'm ruling out B because firstly ..., secondly ..."

I had a great teacher for the math-olympics class, and he used to get angry periodically over my classmates' blatant misuse of "by the same logic" (either because of laziness, or carelessness, or not knowing the real answer and trying to muddy through despite of knowing it was probably wrong), and would order a ban of that trope in our proofs "until further notice" - forcing us to write everything out and thereby, discovering and confronting our mistakes. A few students, myself included, were exempt from the ban because we never committed the sin of "by the same logic" overuse in the first place.

I don't know if this tip helps you in this instance, but my experience is that overall it definitely does.

am 9. Juli 2020, 06:51 Uhr von dm_litv
Your statement about the position of '5' in the top middle box is incorrect.

Zuletzt geändert am 8. Juli 2020, 19:23 Uhr

am 8. Juli 2020, 19:21 Uhr von henrypijames
I was totally stumped by #275 as well - stared at it for a long time and couldn't find the entry. But soon it was featured on CTC, and I couldn't resist peeking - then it was like "of course, so patently obvious!"

With this one at least I knew right away how to get started: Even though the rules are different, the basic method is the same as with Madmahogany's original.

am 8. Juli 2020, 17:49 Uhr von Richard
@marcmees: I already missed you last week; do as a competitor of the German Sudoku Championship advised his fellow competitors a few years ago: think as Richard thinks!

At the moment the SVS puzzles seem to be a bit harder indeed. Probably because the themes suit harder puzzles?

am 8. Juli 2020, 17:29 Uhr von ibag
Very nice!

am 8. Juli 2020, 07:06 Uhr von Richard
Oops! There's a 'typo' in there too. I had three stars difficulty in mind. Well; it's a matter of time before that's corrected. :-)

am 8. Juli 2020, 07:03 Uhr von RockyRoer
That's a lot of negative constraints to work through to be only 2 stars... Fun though.

am 8. Juli 2020, 06:38 Uhr von Richard
Fixed a typo in the solution code (thick fingers). Sorry.

am 8. Juli 2020, 00:01 Uhr von Rollo
@Circleconstant: Please try ID 00019N

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