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problem with diophante.fr puzzles

 
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Dominique



Joined: 28 Feb 2006
Posts: 3

PostPosted: Tue Feb 28, 2006 9:44 am    Post subject: problem with diophante.fr puzzles Reply with quote

hi guys
i'm having a little problem with the puzzles on diophante.fr. it's a french site dealing with math in particular diophantine equations(...). well the problem is that the first few puzzles are right, but in some of them i am forced to use trial and error. can anyone tell me whether he can find a solution using only pure logic.
thanks
dominique
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Marty R.



Joined: 12 Feb 2006
Posts: 5119
Location: Rochester, NY, USA

PostPosted: Tue Feb 28, 2006 5:51 pm    Post subject: Reply with quote

Dominique, I'm a rank amateur compared to the talented solvers who post here. Nevertheless, I'd like to take a shot at some of those puzzles. Could you point to a couple of specific puzzles which required you to use trial and error?
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alanr555



Joined: 01 Aug 2005
Posts: 193
Location: Bideford Devon EX39

PostPosted: Wed Mar 01, 2006 12:43 am    Post subject: Re: problem with diophante.fr puzzles Reply with quote

> I am having a little problem with the puzzles on diophante.fr.
> It is a french site. Tthe problem is that the first few puzzles
> are right, but in some of them I am forced to use trial and
> error. Is there a solution using only pure logic?

Avertissement :
Tous les problèmes sont identifiés par un niveau de difficulté :

très facile
facile
moyen
difficile
très difficile

This allocates one to five stars (etoiles) to the list above
very easy; easy; medium, hard, very hard.
--------------------------------------------------------------------------------

$ C230. Sudoku
$ C231. Sudoku : grilles n°2 - 3 et 4
$ C232. Sudoku : grilles n°5 - 6 et 7
$ C233. Sudoku : grilles n°8 - 9 et 10
$ C234. Sudoku : grilles n°11 - 12 et 13
$ C235. Sudoku : grilles n°14 - 15 et 16
$ C236. Sudoku : grilles n°17 - 18 et 19
$ C237. Sudoku : grilles n°20 - 21 et 22
$ C238. Sudoku : grilles n°23 - 24 et 25

None of these grids appear to be hard or very hard.
Thus it would be interesting to compare the grading system.
Is a diophantine medium like a SamGJ medium???

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

C230. Sudoku

Une grille de Sudoku, puzzle très en vogue en Japon, est faite de la juxtaposition de 9 carrés 3x3. Chacun de ces carrés comporte tous les chiffres de 1 à 9 une fois et une seule. Il s’agit de compléter la grille de telle sorte que chaque ligne et chaque colonne du carré 9x9 comportent elles aussi tous les chiffres de 1 à 9 une fois et une seule.

version imprimable du problème C230

Unfortunately the clip board does not transport the actual puzzles!!

The instructions are then repeated for each set of grids.

--------------------------------------------------------------------------------
C231. Sudoku – Grilles n°2,3 et 4 $
C232. Sudoku – Grilles n°5,6 et 7

Ci-après trois grilles distinctes qui font suite aux grilles déjà proposées dans les rubriques C230 et C231.
C233. Sudoku – Grilles n°8,9 et 10

Ci-après trois grilles distinctes qui font suite aux grilles déjà proposées dans les rubriques C230 à C232 :

C234. Sudoku – Grilles n°11, 12 et 13

A noter : ces trois grilles comportent le minimum de données intiales connu à ce jour (17 en l'occurence) avec solution unique.

This suggests that the puzzles have the minimum number of
initial clues - seventeen.

Ci-après trois grilles distinctes qui font suite aux grilles déjà proposées dans les rubriques C230 à C233 :

C235. Sudoku – Grilles n°14, 15 et 16

Ci-après trois grilles distinctes qui font suite aux grilles déjà proposées dans les rubriques C230 à C234 :

C236. Sudoku – Grilles n°17, 18 et 19

C237. Sudoku – Grilles n°20,21 et 22

Ci-après trois grilles distinctes qui font suite aux grilles déjà proposées dans les rubriques C230 à C236 :

C238. Sudoku – Grilles n°23,24 et 25

Ci-après trois grilles distinctes qui font suite aux grilles déjà proposées dans les rubriques C230 à C237 :

+++++++++++++++++++++++++++++++++++++++++++

It was such a shame not being able to transport some of the
puzzles from that other site. I was able to post them into a
MS-Word document using Paste Special. Is there an equivalent
way to get them into a post in this forum?

The alternative is to transcribe the grids off the screen onto paper and
then to retype them - an error-prone process if ever there is one!
I would wish to post grids 11,12,13 quoted under C234.

Alan Rayner BS23 2QT
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