The New Sudoku Players' Forum

[Hajime]

Sixy Sudoku E36 gives me troubles.
I could do the 4 in r5c3.
How to proceed?

[1to9only]

nice puzzle, 6x6 jigsaw, after a quick look:
single 5r4c5, -5r1c46
pair 46r13c5, -6r1c6
pair 13r1c46, -1r1c123
pointing 1r34c2, -1r56c2
r5c2=6
.

[Hajime]

Yes...
"You will only see it when you get it" (Johan Cruijff)
Thanks

[1to9only]

The SixySudoku is a fairly recent variant - it is 6x6 Sudoku with row, column and 2Rx3C block constraints, with a fourth constraint of usually rectangular 3Rx2C blocks - in post#1, the 4th constraint is irregular jigsaw blocks.
I'll see whether I can convert my Sudoku6x6Explainer into a SixyExplainer!
If anyone is interested, I've found some internet resources:
- a simple command-line sixysolver with C source (for 4th 3Rx2C constraints) is here.
- there are some 60 (with jigsaw blocks) computer generated puzzles here - unfortunately they are all gif images of the puzzles, and not the puzzles in text format!
.

[tarek]

The SixySudoku is a fairly recent variant - it is 6x6 Sudoku with row, column and 2Rx3C block constraints, with a fourth constraint of usually rectangular 3Rx2C blocks - in post#1, the 4th constraint is irregular jigsaw blocks.
I'll see whether I can convert my Sudoku6x6Explainer into a SixyExplainer!
If anyone is interested, I've found some internet resources:
- a simple command-line sixysolver with C source (for 4th 3Rx2C constraints) is here.
- there are some 60 (with jigsaw blocks) computer generated puzzles here - unfortunately they are all gif images of the puzzles, and not the puzzles in text format!
.

Thanks for sharing this

tarek

[Hajime]

There is a website with Sixy Sudoku puzzles at https://www.sixysudoku.com and at Google Play
Creator is  Peter Ritmeester, who also "invented" the Windoku 9x9 Sudoku, years ago.

[tarek]

The SixySudoku is a fairly recent variant - it is 6x6 Sudoku with row, column and 2Rx3C block constraints, with a fourth constraint of usually rectangular 3Rx2C blocks - in post#1, the 4th constraint is irregular jigsaw blocks.
I'll see whether I can convert my Sudoku6x6Explainer into a SixyExplainer!
If anyone is interested, I've found some internet resources:
- a simple command-line sixysolver with C source (for 4th 3Rx2C constraints) is here.
- there are some 60 (with jigsaw blocks) computer generated puzzles here - unfortunately they are all gif images of the puzzles, and not the puzzles in text format!
.

If you are planning to go ahead with the Sudoku6x6Explainer modifications then may I suggest for you what I'm planing to do for the 9x9 Sukaku explainer. For the 6x6 it would be a string of 36 characters that show the different regions each with a different symbol ( 1 to 6 for example ) This can be imported to the engine which can then update your definitions. These definitions can be displayed in the GUI Welcome screen for the user to reference from. This would be a 1st step before programming the Panel to display the jigsaw regions which can be left until there is time to do it.

tarek

[1to9only]

Higher clue numbered singles only sixy puzzles can probably be solved with 2Rx3C techniques, e.g.

6x6 Sudoku - row, column and 2Rx3C constraints:

Code: Select all

.......324..2.6..1..4.6......46..51. ED=1.2/1.2/1.2

...|...
.32|4..
---+---
2.6|..1
..4|.6.
---+---
...|..4
6..|51. ED=1.2/1.2/1.2


Lower clue numbered singles only sixy puzzles will probably require sixy 3Rx2C eliminations to solve, e.g.

Sixy Sudoku - row, column, 2Rx3C and 3Rx2C constraints:

Code: Select all

...3.2........2..4..5.......6..2.... SIXY ED=1.2/1.2/1.2

..|.3|.2
..|..|..
..|2.|.4
--+--+--
..|5.|..
..|..|6.
.2|..|.. ED=1.2/1.2/1.2


I'll be using these visual clues to distinguigh between 6x6 sudokus and Sixy sudokus. Other ideas are welcome.
.

[1to9only]

SixyExplainer is chugging along. There is no plan to do the jigsaw variant.

Code: Select all

.34...2........1.........2..6.5....1 SIXY ED=7.1/7.1/2.6

.3|4.|..
2.|..|..
..|.1|..
--+--+--
..|..|..
.2|..|6.
5.|..|.1 ED=7.1/7.1/2.6

Difficulty rating: 7.1
This Sudoku can be solved using the following logical methods:
26 x Hidden Single
1 x Direct Hidden Pair
4 x Pointing
3 x Aligned Pair Exclusion
4 x Turbot Fish
2 x Forcing Chain


[1to9only]

I've created a SixySolver (download it from here) using the solver code from wilberdk's sixy. More info from here.

The ED=7.1/7.1/2.6 puzzle I posted is solved by this command:

Code: Select all

SixySolver.exe .34...2........1.........2..6.5....1


Hajime's E36 SixySudoku puzzle is solved by this command:

Code: Select all

SixySolver.exe .......3..2...........5..........6.4 111222314425314425314425336655366665


.

[Hajime]

I've created a SixySolver ...

Great work 1to9. That is beyond my reach. Respect.

[tarek]

Sixy Sudoku - row, column, 2Rx3C and 3Rx2C constraints

Code: Select all

....2..4...5..1.........63.........3
.1...35..........2..4......6.......1
.1.4.5......6.......2........1....3.
.2...54..........3..1......6.......2
.3.56.......2.......4........1....3.
.35..4...........1..16..2...........
.4...1....3.....6...51........2.....
.6...12..........4...3........15....
1...3..5..2..........4..2.6.........
2....5.3............21..6...4.......
2..5.4......1.......61......3.......
41........1......5..6........2...3..
5....3.1...2.........4..2.6.........
5....4.1...2.........6.........43...
5...2..3..1..........6........1.4...
...6..........32..2...4.1......3..5.
..2.1.13........6....5...4.....1....
.1..2.....6.4........4..2.5...1.....
.4...5.1...26.............3.2.1.....
.5..3.4...5.....1....3..6......2....
1..4.6......5.......2......3.2....1.
2......1...6.5..4...2......3......1.
4...5..3...2........1......621......
45...2....5......1......6.3....2....
.45...2.....5..1..4.........12....3.


[1to9only]

Sixy Sudoku - row, column, 2Rx3C and 3Rx2C constraints

Do u want a rating for these?
I have a working SixyExplainer (row, column, 2Rx3C and 3Rx2C constraints), for probable release sometime next week.
If anyone wants to try it out, I can put out a pre-release...
.

[tarek]

Sixy Sudoku - row, column, 2Rx3C and 3Rx2C constraints

Do u want a rating for these?
I have a working SixyExplainer (row, column, 2Rx3C and 3Rx2C constraints), for probable release sometime next week.
If anyone wants to try it out, I can put out a pre-release...
.

I've tried SixySolve but for some reason couldn't get a solution. I'm not sure if I have a bug in my generator or I made a mistake somewhere in the region definitions

[1to9only]

Oops! I think I've introduced a bug in SixySolver - the original sixy.c works.
Also 3 of the 25 solves - the only 3 having a given in the last cell!!!
SixyExplainer has a rating for all 25, so the grids are good.
.