The New Sudoku Players' Forum

[RW]

A very easy puzzle. It has a Unique Loop Type 2. I have no idea how you call this. I didn't find such in the forum until now. But you just have another name for this here, I'm sure. That's why I didn't find it yet.

Around here they're called BUG-lites, as they are a 'lite' version of the BUG pattern. Not all empty cells in the grid included, otherwise they follow the same principle.

There must be 4 types too like with UR

There's a lot more of UR types than four, as there is also a lot more of BUG and BUG-lite types, just depends on how far you are willing to expand the concept of "pattern".

RW

[RW]

The Empire has manufactured a new type of super Tie fighters:

Code: Select all

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


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

The first one can easily defend itself against a X-wing, the second cannot even be defeated by 2 X-wings.

RW

[Ocean]

Code: Select all

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

... the second cannot even be defeated by 2 X-wings.

... but it takes only two extra loops to bring it down:

Code: Select all

 *--------------------------------------------------*
 | 157  567  8    |-457  19   47   | 3    2    69   |
 | 2    3   #57   |#57   8    69   | 1    4    69   |
 | 4    16   9    | 13   2    36   | 7    8    5    |
 |----------------+----------------+----------------|
 | 38   457 -457  | 9    6    1    | 2    35   78   |
 | 59   2    6    | 38   7    38   | 4    59   1    |
 | 38   79   1    | 2    4    5    | 6    39   78   |
 |----------------+----------------+----------------|
 | 6    14   3    | 18   5    48   | 9    7    2    |
 | 79   8   #47   | 6    39   2    | 5    1   #34   |
 | 159 -459  2    |#47   139 -479  | 8    6   #34   |
 *--------------------------------------------------*
6-ring: [r2c3]-7-[r8c3]-4-[r8c9]-3-[r9c9]-4-[r9c4]-7-[r2c4]-5-[r2c3] =>r1c4<>7, r4c3<>7, r9c2<>4.
 
 *--------------------------------------------------*
 |-157 #56   8    | 45   19   47   | 3    2    69   |
 | 2    3   #57   | 57   8    69   | 1    4    69   |
 | 4   #16   9    | 13   2    36   | 7    8    5    |
 |----------------+----------------+----------------|
 | 38   457  45   | 9    6    1    | 2    35   78   |
 | 59   2    6    | 38   7    38   | 4    59   1    |
 | 38   79   1    | 2    4    5    | 6    39   78   |
 |----------------+----------------+----------------|
 | 6   #14   3    | 18   5    48   | 9    7    2    |
 | 79   8   #47   | 6    39   2    | 5    1    34   |
 | 159  59   2    | 47   139  79   | 8    6    34   |
 *--------------------------------------------------*
5-ring: [r1c2]-6-[r3c2]-1-[r7c2]-4-[r8c3]-7-[r2c3]-5-[r1c2] => r1c1<>5.

[JPF]

The Empire has manufactured a new type of super Tie fighters:
The first one can easily defend itself against a X-wing, the second cannot even be defeated by 2 X-wings.
RW

Two quick mutations have made them stronger :

Code: Select all

 . . 8 | . . . | 3 . .
 . 7 . | . . . | . 2 .
 4 . 9 | . 2 . | 8 . 5
-------+-------+-------
 . . . | 9 . 3 | . . .
 . . 6 | . 7 . | 4 . .
 . . . | 2 . 5 | . . .
-------+-------+-------
 6 . 3 | . 5 . | 9 . 2
 . 8 . | . . . | . 1 .
 . . 2 | . . . | 5 . .



Code: Select all

 . . 7 | . . . | 3 . .
 . 3 . | . . . | . 4 .
 4 . 9 | . 2 . | 7 . 5
-------+-------+-------
 . . . | 9 . 1 | . . .
 . . 6 | . 7 . | 4 . .
 . . . | 2 . 5 | . . .
-------+-------+-------
 6 . 3 | . 5 . | 9 . 2
 . 8 . | . . . | . 1 .
 . . 2 | . . . | 8 . .



JPF

[JPF]

The new generation :

Code: Select all

 . . 6 | . . . | 8 . .
 . 4 . | . . . | . 2 .
 1 . 3 | . 4 . | 9 . 7
-------+-------+-------
 . . . | 5 . 8 | . . .
 . . 8 | . 6 . | 1 . .
 . . . | 9 . 1 | . . .
-------+-------+-------
 8 . 7 | . 1 . | 2 . 6
 . 5 . | . . . | . 3 .
 . . 1 | . . . | 4 . .



and its twin r5c5=7
same rating SE = 8.5

[edited : new new generation]

Code: Select all

 . . 6 | . . . | 9 . .
 . 1 . | . . . | . 5 .
 4 . 8 | . 7 . | 2 . 1
-------+-------+-------
 . . . | 2 . 5 | . . .
 . . 4 | . 6 . | 8 . .
 . . . | 1 . 7 | . . .
-------+-------+-------
 8 . 1 | . 2 . | 6 . 9
 . 6 . | . . . | . 8 .
 . . 2 | . . . | 5 . .



SE = 8.9

JPF

[RW]

Two quick mutations have made them stronger :

The second is really nice. I'm not sure if the first can qualify as a Tie fighter... I think a Tie fighter has to confront a X-wing in the basic solving path to justify it's name. I've been looking for normal Tie fighters that are defeated by X-wings, but the pattern seems quite impossible:

Code: Select all

X . . . . . . . X
X . . . . . . . X
X . . . X . . . X
X . . X . X . . X
X X X . . . X X X
X . . X . X . . X
X . . . X . . . X
X . . . . . . . X
X . . . . . . . X

Haven't got anywhere near an unique puzzle yet... Advanced Tie-fighters does exist:

Code: Select all

. X . . . . . X .
X . . . . . . . X
X . . . X . . . X
X . . X . X . . X
X X X . . . X X X
X . . X . X . . X
X . . . X . . . X
X . . . . . . . X
. X . . . . . X .

But I haven't found any with the appropriate solving path yet...

Here's one that's malfunctioning due to a direct hit in the wing that caused a BUG:

Code: Select all

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

It must have been a lucky hit, because the advanced Tie fighter is not always that easy to take down. Here's one that suffered a lot more damage, but it can still fly and defend itself against an X-wing plus some of the more developed wings in use by the rebel Alliance, including XY-wing XYZ-wing and the very high tech Sashimi X-wing. Actually it could still sustain 4 more direct hits without crashing:

Code: Select all

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

RW

[JPF]

... Advanced Tie-fighters does exist:

Code: Select all

. X . . . . . X .
X . . . . . . . X
X . . . X . . . X
X . . X . X . . X
X X X . . . X X X
X . . X . X . . X
X . . . X . . . X
X . . . . . . . X
. X . . . . . X .

But I haven't found any with the appropriate solving path yet...

Here's one :

Code: Select all


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



JPF

[claudiarabia]

A very easy puzzle. It has a Unique Loop Type 2. I have no idea how you call this. I didn't find such in the forum until now. But you just have another name for this here, I'm sure. That's why I didn't find it yet.

Around here they're called BUG-lites, as they are a 'lite' version of the BUG pattern. Not all empty cells in the grid included, otherwise they follow the same principle.
RW

Thank you for the explanation. Until now I always thought a bug-lite to be this pattern.

Code: Select all

. . 12 | . . 23 | . . 31
. . .  | . . .  | . . .
. . 12 | . . 23 | . . 31+x    Bug-lite


and this to be an unique loop

Code: Select all

12 . . |  . . 12
 . . . |  . . .
12 . . | 12 . .
------------------
 . . . |  . . .
 . . . | 12 . 12+x Unique loop

So do you put these two together in one category?

Claudia

[claudiarabia]

Code: Select all

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


It's minimal but not untouchable. Interesting are the cells r3c6 and r4c7 for altering. They allow some easier or different versions of this puzzle.

Happy solving!

Claudia

[m_b_metcalf]

It's minimal but not untouchable. Interesting are the cells r3c6 and r4c7 for altering. They allow some easier or different versions of this puzzle.

Happy solving!

Claudia

This has the same pattern and drives Sudoku Explainer spare, going over 9 many times with a maximum of 9.4.

Viele Grüße,

Mike Metcalf

Code: Select all

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


[JPF]

Here's a new variation of gurth's GB16 :

"12 + 456789 lines"

Code: Select all


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

21 clues, minimal, diagonal-symmetric, SE = 9.0

JPF

[gurth]

Very neat variations on the 456789 lines, JPF!
Interesting that these lines seem to fix all the variations in a narrow SE range of 9.0 to 9.1.

[JPF]

Mitosis

Code: Select all

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


SE = 8,4

Code: Select all

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



SE = 8,3

JPF

[tarek]

Impressive JPF.....

I suppose the challenge would be a puzzle that comes from a GRID that displays diagonal symmetry.........

tarek

[m_b_metcalf]

Ocean, any luck of your programs to generate this pattern?

Code: Select all

 x x x | x x x | x x x
 x x x | . . . | x x x
 x x x | . . . | x x x
-------+-------+-------
 x . . | . . . | . . x
 x . . | . x . | . . x
 x . . | . . . | . . x
-------+-------+-------
 x x x | . . . | x x x
 x x x | . . . | x x x
 x x x | x x x | x x x

There seems to be a real problem with this pattern. For what it's worth, the nearest I could get (note order of values around perimeter) was the one below. (This is one of two as yet unsolved patterns on this thread.)

Regards,

Mike Metcalf

Code: Select all

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


EDIT: In fact, two central cells are also easy:

Code: Select all

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