## Sudokus with an original rare shape

Everything about Sudoku that doesn't fit in one of the other sections

### a permutation

ronk wrote:A spider maybe ...

Code: Select all
` . 3 . . 4 . . . 6 . . . . . . 5 3 . . . . . . . . 1 . . . 1 2 . . . . . . 4 . . 5 . . . 8 9 . . . . 7 . . . 2 . . . . 6 . . . . 5 . . 3 . . . 4 . . 7 1 . . . . .`

A very difficult spider BTW.

Be it a permutation. It's a very refined one. It still takes efforts to carve out a new pattern out of an old grid. Mostly you have to change some clues anyway to generate a valid solution.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

### Re: a permutation

claudiarabia wrote:It still takes efforts to carve out a new pattern out of an old grid. Mostly you have to change some clues anyway to generate a valid solution.

Really? I thought by permutating a valid puzzle you get another valid puzzle automatically...
udosuk

Posts: 2698
Joined: 17 July 2005

### Re: a permutation

udosuk wrote:
claudiarabia wrote:It still takes efforts to carve out a new pattern out of an old grid. Mostly you have to change some clues anyway to generate a valid solution.

Really? I thought by permutating a valid puzzle you get another valid puzzle automatically...

Permutations do not change the puzzle, true.
fermat

Posts: 105
Joined: 29 March 2006

### A snake

Code: Select all
`1 . . . 4 3 5 . .. . . 8 . . . 7 .. . 2 . . . . . 1. . 1 . . . . . 69 . . 2 5 6 . . 88 . . . . . 3 . .4 . . . . . 2 . .. 1 . . . 9 . . .. . 3 1 7 . . . 4`

claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

I like the sub-patterns.
Code: Select all
` . . . . 9 8 7 . . . . . 3 . . . 6 . . . 7 . . . . . 5 . . 4 . . . . . 1 . . . 2 3 7 . . . 6 . . . . . 3 . . 3 . . . . . 9 . . . 5 . . . 1 . . . . . 2 5 8 . . . .`

Claudia,
What is interesting in this one, is that you can choose 3 numbers in r9c5...
You get very different puzzles .
Code: Select all
`r9c5   ER4      7.46      2.68      8.3  `

JPF
JPF
2017 Supporter

Posts: 3754
Joined: 06 December 2005
Location: Paris, France

How shape like this is
Code: Select all
`..56927...9.....2.7...1...59.......22.8.6.9.16.......48...3...9.3.....5...97218..`
Eioru

Posts: 182
Joined: 16 August 2006

### The ugly 4

JPF wrote:I like the sub-patterns.
Code: Select all
` . . . . 9 8 7 . . . . . 3 . . . 6 . . . 7 . . . . . 5 . . 4 . . . . . 1 . . . 2 3 7 . . . 6 . . . . . 3 . . 3 . . . . . 9 . . . 5 . . . 1 . . . . . 2 5 8 . . . .`

Claudia,
What is interesting in this one, is that you can choose 3 numbers in r9c5...
You get very different puzzles .
Code: Select all
`r9c5   ER4      7.46      2.68      8.3  `

JPF

Hi JPF, thank you for eliminating the ugly 4 in r9c9. Now it's perfect. And for the three ways-hints. Sometimes I'm also searching for some trigger points of level-change, some people in my surrounding become disappointed otherwise.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Code: Select all
` *-----------------* |5 . .|. . .|. . 4| |. 3 .|. 2 .|. 6 .| |. . .|6 . 1|. . .| |-----+-----+-----| |. . 6|4 . .|9 . .| |. 1 .|. . .|. 2 .| |. . 3|. . 2|8 . .| |-----+-----+-----| |. . .|9 . 7|. . .| |. 4 .|. 6 .|. 5 .| |8 . .|. . .|. . 7| *-----------------* `

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Claudia, nice job of mixing things up: Singles, 2x Naked Pair, 2x Naked Triple, 3x Locked Candidates, Swordfish, X-Wing, 2x XY-Wing, XYZ-Wing, UR 1, Colors, Multi-Colors, Triple-Implication Chain, 3x Elimination-By-Contradiction.
daj95376
2014 Supporter

Posts: 2624
Joined: 15 May 2006

### A wheel

Eioru wrote:How shape like this is
Code: Select all
`..56927...9.....2.7...1...59.......22.8.6.9.16.......48...3...9.3.....5...97218..`

Hi Eioru,

Whow, there are several wheels here in the forum, but I never saw one, where you can put in all possible candidates in r5c5, i.e. the center, getting a valid ambitious solution every time: 5 and 7 give Level SE 7,3 and 4 and 6 give Level 7,8! Congrats for this!

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

### not really difficult ...

...but I could make my previous sudoku fully symmetric

Code: Select all
`5 . . . . . . . 4. 3 . . 2 . . 6 .. . . 6 . 1 . . .. . 6 . . . 9 . .. 1 . . 5 . . 2 .. . 3 . . . 8 . .. . . 9 . 8 . . .. 4 . . 1 . . 5 .8 . . . . . . . 2`

Suggestions to make this pattern more difficult are welcome. I'm tired and will go to sleep now.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

Here's one to start :

Code: Select all
` 7 . . . . . . . 4 . 3 . . 5 . . 6 . . . . 6 . 1 . . . . . 6 . . . 9 . . . 1 . . . . . 2 . . . 3 . . . 7 . . . . . 9 . 7 . . . . 2 . . 3 . . 8 . 8 . . . . . . . 7`

JPF
JPF
2017 Supporter

Posts: 3754
Joined: 06 December 2005
Location: Paris, France

JPF wrote:Here's one to start :

Code: Select all
` 7 . . . . . . . 4 . 3 . . 5 . . 6 . . . . 6 . 1 . . . . . 6 . . . 9 . . . 1 . . . . . 2 . . . 3 . . . 7 . . . . . 9 . 7 . . . . 2 . . 3 . . 8 . 8 . . . . . . . 7`

JPF

I was sure that somebody of yours will delete the 5 in the center:)
Great!
claudiarabia

Posts: 288
Joined: 14 May 2006

### not really symmetric....

but tough:
Code: Select all
`9 . . . 3 . 8 . 6. . . . 2 . . . .1 . 5 8 . 7 . . 4. . 1 . . . . . .. 7 . . . . . 4 .6 . . . . . 9 . .7 . . 1 . 8 6 . 2. . . . . . . . .8 . 9 . 5 . 7 . 3`

This puzzle was symmetric :-j When I finished it I found that there were to many 7s inside. So I eliminated some of them and the puzzle stayed valid, it's level risen from SE 7,1 to 8,3.

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

### ... and a puzzle of Fermat updated

Code: Select all
`. . . . . . . . .. 8 6 . 2 . 1 7 .. 2 . 8 . 7 . 9 .. 9 . 3 7 1 . 6 .. . . 9 . 6 . . .. 5 . . . . . 3 .. . 4 . 1 . 6 . .. 1 2 . 3 . 4 8 .. . . . . . . . .`

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

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