## Request for data (Sudoku with givens)

Everything about Sudoku that doesn't fit in one of the other sections

### Request for data (Sudoku with givens)

I'm investigating Sudoku Inequality puzzles. In particular whether there is any relationship between G, the minimum number of givens required for fixing a solution (in the standard 9x9 Sudoku puzzle), and R, the number of relationships required to fix a solution for Sudoku Inequality.

So it would be very useful to have a sample set of 100 or so sample grids with various G values.

The most useful format would be simply the givens, eg:
Code: Select all
`000000010400000000020000000000050407008000300001090000300400200050100000000806000`

Can anyone help?

Mathimagics
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Posts: 785
Joined: 27 May 2015

### Re: Request for data (Sudoku with givens)

Not sure what you want. There are minimal puzzles with 17 givens (almost 50000 known) up to 40 givens (2 known).
Do you want e.g. 5 for each number of givens ?
eleven

Posts: 1915
Joined: 10 February 2008

### Re: Request for data (Sudoku with givens)

Yes, that's just what I want!

Mathimagics
2017 Supporter

Posts: 785
Joined: 27 May 2015

### Re: Request for data (Sudoku with givens)

For givens counts between 20 and 29 you can mine the data stored in games_sample, referenced nearby.

Mike Metcalf

m_b_metcalf
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Joined: 15 May 2006
Location: Berlin

### Re: Request for data (Sudoku with givens)

Thanks, Mike!

I have also found eleven's advice on generating examples for G > 29 given over here.

Thanks to both of you, that should be enough to go on with

And thanks to dobrichev for the G = 38, 39, and 40 collections.

Mathimagics
2017 Supporter

Posts: 785
Joined: 27 May 2015

### Re: Request for data (Sudoku with givens)

Mathimagics wrote:Yes, that's just what I want!

Are you sure about that ?

For example:
The two 40 clue (minimal) puzzles, have the same solution grid.
That grid is also the (unique) solution to seven different 18 clue puzzles.

Code: Select all
`(40 clues)..........12.34567.345.6182..1.582.6..86....1.2...7.5...37.5.28.8..6.7..2.7.83615..........12.34567.345.6182..1.582.6..86....1.2...785...37.5.2..8..6.7..2.7.83615(18 clues).........81..........5.6..2......2.63...9..7.......85..6..1......5....3.....83.......2..4.81.9......3..7...2...3.8..........7...91...5.......9.8..5.6..............7.....4.81..........5.6........8..63...9.....2..4........1.92...5..........8..1.......34.81...4...9.................3...9...1.....7.5..6..1.9.8..5........7.8....5...........9.4..7.3...6......35......8..2...6.9...8.........2.1......3...7...6..5.6..............7....7..82....5.......69.4...2......3......92..8..........4.36.........4....93.....3.....82.4...8........2.716.9............9...8.......2.....6.5(solution grid)576821349812934567934576182741358296358692471629147853463715928185269734297483615`
blue

Posts: 712
Joined: 11 March 2013

### Re: Request for data (Sudoku with givens)

I also wondered, what kind of relationship Mathimagics is looking for (which could be researched with such sample puzzles)
I guess there are no good estimates for inequality sudokus, how many minimal puzzles there are with any fixed number of relations. I would have expected, that they would have to be calculated to see a relationship.
eleven

Posts: 1915
Joined: 10 February 2008