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		| Dominique 
 
 
 Joined: 28 Feb 2006
 Posts: 3
 
 
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				|  Posted: Tue Feb 28, 2006 9:44 am    Post subject: problem with diophante.fr puzzles |   |  
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				| 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: 5770
 Location: Rochester, NY, USA
 
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				|  Posted: Tue Feb 28, 2006 5:51 pm    Post subject: |   |  
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				| 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: 198
 Location: Bideford Devon EX39
 
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				|  Posted: Wed Mar 01, 2006 12:43 am    Post subject: Re: problem with diophante.fr puzzles |   |  
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				| > 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???
 
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 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.
 
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 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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