Sudoku Variants Series (124) - Sum to 9 Sudoku
(Eingestellt am 12. April 2016, 00:00 Uhr von Richard)
Sum to 9
Solve online in F-Puzzles (thx bbutrosghali!)
Platziere die Ziffern von 1 bis 9 in jede Zeile, jede Spalte und jeden 3x3-Block. Hinweise außerhalb des Gitters geben die Summe aller direkten Nachbarn der Ziffer 9 in der entsprechenden Zeile oder Spalte an.
Diese Sudokuvariante wurde bei der Niederländischen Sudokumeisterschaft am 10. April 2016 eingeführt. Dieses Rätsel war zu schwierig um in der Meisterschaft verwendet zu werden, weil es zu lange dauert, die Position der ersten
Neunen zu finden.
Lösungscode: Zeile 5, gefolgt von Spalte 4.
Kommentare
am 14. Juli 2022, 17:01 Uhr von Richard
Added link and tag for online solving. Thx bbutrosghali!
am 29. November 2021, 21:20 Uhr von snowyegret
can you please clarify the meaning of "direct neighbours". is it the two orthogonally adjacent cells ? for example if the row is 129345678 then that rows clue would be 5 ?
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Answer: your example is correct. Direct neighbours in a row are the digits direct on the left and direct on the right of the nine; neighbours in a column are the digits direct above and direct below the nine. In case the nine is at the border, there is only one neighbour in that row or column.
am 17. April 2021, 17:15 Uhr von bbutrosghali
https://f-puzzles.com/?id=yh9spbe4
am 17. April 2016, 00:22 Uhr von zhergan
It was little bit hard to progress for some digits. But this one is clearly a very nice sudoku :)
am 15. April 2016, 14:47 Uhr von Realshaggy
A wild guess is, it's not the same people that dislike hard and easy puzzles.
am 15. April 2016, 07:42 Uhr von Richard
This puzzle was my first try to make this new variant without givens. I was convinced that should be possible. Although this one turned out to be logical solvable, I realised many players wouldn't be able to find the logic during a championship. For that reason I used it here. There is a little bit of elimination necessary before the first 9 can be placed, but it isn't very hard to find. I have written these steps in a hidden comment.
am 14. April 2016, 21:23 Uhr von HaSe
Nicht leicht, aber schon noch vernünftig lösbar.
Und wie immer wunderschön, klasse Rätsel und natürlich die absolut "best series ever".
am 14. April 2016, 08:10 Uhr von Statistica
Das war für mich bisher das Schwierigste von den 124. Hat aber Spaß gemacht!
am 13. April 2016, 20:22 Uhr von Richard
Obviously some people didn't find the logic, otherwise I can't explain the quick drop from 90 to 82%. Sometimes easy puzzles aren't appreciated, sometimes the hard ones. I don't know what players expect now and than... :-(
am 13. April 2016, 20:20 Uhr von Richard
@Hasenvogel: you can determine the first placements of nines by logic, but it takes some time.
am 13. April 2016, 19:51 Uhr von Hasenvogel
Nicht eindeutig, musste ausprobieren. Ansonsten witzige Variante
