The New Sudoku Players' Forum

[claudiarabia]

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

[udosuk]

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...

[fermat]

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.

[claudiarabia]

Code: Select all

1 . . . 4 3 5 . .
. . . 8 . . . 7 .
. . 2 . . . . . 1
. . 1 . . . . . 6
9 . . 2 5 6 . . 8
8 . . . . . 3 . .
4 . . . . . 2 . .
. 1 . . . 9 . . .
. . 3 1 7 . . . 4


claudia

[JPF]

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   ER

4      7.4
6      2.6
8      8.3 


JPF

[Eioru]

How shape like this is

Code: Select all

..56927..
.9.....2.
7...1...5
9.......2
2.8.6.9.1
6.......4
8...3...9
.3.....5.
..97218..

[claudiarabia]

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   ER

4      7.4
6      2.6
8      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]

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

[daj95376]

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.

[claudiarabia]

How shape like this is

Code: Select all

..56927..
.9.....2.
7...1...5
9.......2
2.8.6.9.1
6.......4
8...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]

...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

[JPF]

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

[claudiarabia]

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]

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]

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