Mini Quad Sudoku

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Mini Quad Sudoku

Postby kakuroatk » Thu Apr 22, 2021 9:45 pm

Here is a simple sudoku variation that I created which encompasses 4 mini 6x6 sudokus:

Image

This puzzle can be playable online here: https://www.atksolutions.com/games/sudoku.html
and the puzzle # is E10011 which can be entered by clicking the pencil/paper icon on the main screen.

The numbers used for this puzzle is 1 - 6 and this is listed as an easy.

Any good feedback is welcome.
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Re: Mini Quad Sudoku

Postby creint » Fri Apr 23, 2021 6:56 am

Only singles required, should be very easy because of large bottlenecks. 11 steps for 93 placements, you probably could find on average 9 placements at any point during solving.
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Re: Mini Quad Sudoku

Postby urhegyi » Fri Apr 23, 2021 7:13 am

A computer generated hard full 9X9 Quad Sudoku
Image
Code: Select all
#4//B4,N/J4,N/B20,N/J20,N
.6...258...4.......9..........8...3.1.83..9..34....8....9.8.42.4...7.............
.279...1.......2.........5..3...7.....9..54.1..4....26.13.4.5......7...2.........
.........9...8......4.1.72.14....6..3.89..1.....5...3..7.........3.......2...357.
.............7...8.17.4.2....3....51..4..97.3.6...5..........1.......4...281...7.
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Re: Mini Quad Sudoku

Postby kakuroatk » Fri Apr 23, 2021 2:10 pm

Here is a hard puzzle:

Image

It is puzzle #H60008.

Do you find it difficult even though only digits 1 through 6 are being used?
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Re: Mini Quad Sudoku

Postby Hajime » Fri Apr 23, 2021 5:28 pm

urhegyi wrote:A computer generated hard full 9X9 Quad Sudoku
To get such a nice symmetric layout like the first Mini Quad, you can change the symmetry type from T to X in Gen_Params of SiSeSuSo.
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Re: Mini Quad Sudoku

Postby Hajime » Sat Apr 24, 2021 5:01 pm

kakuroatk wrote:Here is a simple sudoku variation that I created which encompasses 4 mini 6x6 sudokus:
....
Any good feedback is welcome.

But it is not that easy... I tried the first (E10011) manually on the website 3 times and all went wrong.
It would be nice that all possible pencil marks can be added or that you can go back (now limited to 5 steps)
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Re: Mini Quad Sudoku

Postby kakuroatk » Sat Apr 24, 2021 7:59 pm

Hi Hajime. Thank you for the feedback. I am still trying to figure out the best way to do an auto-fill feature.
Right now there is a nice copy and paste feature "C-copy cell / V - paste cell" which can fill the boxes pretty quickly.
Lets say you want to fill a constraint: just type the pencil-marks, press C, move to the next cell and press V, move to another cell and press V again, etc...
Because of the overlapping mini-sudokus, I find it best to come up with a system to reduce the chance of error from the overlap.
I usually fill the boxes first and then work on the rows and columns. In the end, E10011 should unravel pretty quickly.
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Re: Mini Quad Sudoku

Postby urhegyi » Mon Apr 26, 2021 10:40 am

Solving the first easy one(E10011) was a question to find the right pencilmark technique.
Once you have solved the first and third 6x6 the other 2 ones solve rather easily.
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Re: Mini Quad Sudoku

Postby urhegyi » Wed Apr 28, 2021 9:27 am

After finding out how the easy ones can be solved, i will attack now your hard example(H60008) to find out if it's hard because of a lot of bookkeeping or if there are special techniques involved.
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Re: Mini Quad Sudoku

Postby 1to9only » Wed Apr 28, 2021 9:54 am

urhegyi wrote:i will attack now your hard example(H60008)

It is Diabolical...
Code: Select all
1........6..5....6.4.1.....2........ ED=3.2/3.2/2.6
...4.....2.36.4..............5...... ED=8.2/8.2/2.6
......5..............1.44.6.....3... ED=8.9/8.9/2.6
........2.....5.4.4....5..6........1 ED=8.4/1.5/1.5
ED=8.9/1.5/1.5

Solution: Show
165342432615513426246153351264624531
236451541263614532325146462315153624
624531531426145362362154456213213645
153624642513235146461235316452524361

Edit: revised ratings.
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