The New Sudoku Players' Forum

[urhegyi]

125439002_2278010265678784_3475768094186885609_o.jpg (7.53 KiB) Viewed 1052 times

[urhegyi]

I solved it myself. Thank you.

[Hajime]

You solved your own puzzle... How?

[1to9only]

SudokuSolver - u have to define jigsaw regions, and select X - this JigsawX is solved, singles only.
JSudoku - u have to define jigsaw regions, and select X - this JigsawX is solved, singles only.
SudokuJigsawExplainer will also can be used to solve this, but u have to do the X candidate eliminations!

Code: Select all

........................6.....8..2..1.5....748....2........3..9.4.....1....2.6... 111122222111112222333345555366445555366445777368447777368447799368889999668888999 JSX

SumoCueV1D=0J0=0J0=0J0=0J0=0J1=0J1=0J1=0J1=0J1=0J0=0J0=0J0=0J0=0J0=0J1=0J1=0J1=0J1=0J2=0J2=0J2=0J2=0J3=0J4=6J4=0J4=0J4=0J2=0J5=0J5=8J3=0J3=0J4=2J4=0J4=0J4=1J2=0J5=5J5=0J3=0J3=0J4=0J6=7J6=4J6=8J2=0J5=0J7=0J3=0J3=2J6=0J6=0J6=0J6=0J2=0J5=0J7=0J3=0J3=3J6=0J6=0J8=9J8=0J2=4J5=0J7=0J7=0J7=0J8=0J8=1J8=0J8=0J5=0J5=0J7=2J7=0J7=6J7=0J8=0J8=0J8

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


Edit: fixed SumoCue definition.

[urhegyi]

You solved your own puzzle... How?

It was posted with 5 stars (the maximum) and very challenging. But I tried myself and like in most newspapers or apps this does not mean they are very hard.
I solved with pencil on paper and found only singles, but it was a good start to discover more.

You have to do the X candidate eliminations yourself

I didn't know you can use jigsawexplainer when the solution is not unique because of the diagonal blocks are not(yet) implemented.

[1to9only]

I didn't know you can use jigsawexplainer when the solution is not unique because of the diagonal blocks are not(yet) implemented.

I've corrected my previous post - when I get the multiple solutions message, i scan the diagonals and manually eliminate candidates - had to do this a few times!
Implementing X in the JigsawExplainer would be nice, but this is low priority on my list of things to do...

[urhegyi]

2020-11-19 (1).png (24.59 KiB) Viewed 995 times

[Hajime]

And here is a puzzle with the same layout that also needs some generalized intersections

XJS.PNG (4.08 KiB) Viewed 981 times

The puzzle is also with diagonals (XSudoku), not shown in above image.

Code: Select all

#1//B4,XJS
2..19.............................2.45....3.2....6...........9...6......73.5..2..
111122222111112222333345555366445555366445777368447777368447799368889999668888999


[urhegyi]

2020-11-19 (2).png (24.54 KiB) Viewed 974 times

I will give it a try, Thanks

[urhegyi]

There is a certain logic in both puzzles. They share the same pattern: the first four digits in row 1 are the last 4 digits of row 2 and the last five digits of row 1 are the same as the first five digits of row 2. And there are more similarities comparing the two puzzles. Can you explain how you created the second from the first? One thing I can say: when I not discovered the way of shuffling solving would be a lot more difficult because of the many locked candidates(pointing and claiming). I also have to find out how the generalized intersections actually work. I'm used to work with the classical intersections.

[1to9only]

SudokuJigsawExplainer finds far too many generalized intersections. It's a BUG! I'll fix this next week.

[urhegyi]

2020-11-19 (3).png (81.19 KiB) Viewed 956 times

[Hajime]

There is a certain logic in both puzzles. ... Can you explain how you created the second from the first?

It is exactly the same puzzle, but only the digits have been swapped. there are 9! possibilities for this puzzle
Eg. all 4's became 2's.

I also have to find out how the generalized intersections actually work. I'm used to work with the classical intersections.

in http://forum.enjoysudoku.com/generalized-methods-t38209.html I try to explain generalized intersections (and generalized kites).
You always need some extra constraints, like the diagonals, to lock a single digit into 3 or more houses.

Here is a new one XJS with the same layout, so also with diagonals. You need some chains...
And the puzzle is a different one than the above.

XJS_hard.PNG (14.12 KiB) Viewed 942 times

Code: Select all

#1//B4,XJS
...4.2....2.....7.91..8..45...........................29..4..61.4.....9....6.9...
111122222111112222333345555366445555366445777368447777368447799368889999668888999


[urhegyi]

2020-11-20.png (23.85 KiB) Viewed 932 times

[urhegyi]

solution found.