Pemutations of Sudoku method anyone?

IIRC the Sudoku site covered some, if not most, of this some time back. Mainly setting up all possible puzzles to foist off on an unsuspecting puzzle fanatics.

You can have your fun your way. I have my own ideas of fun.

Thank you just the same.

Sorry I just can't get into games with such a small set of possibilities. I prefer GO with something like 10^200 possible permutations. Beats the heck out of Sudoku and even Chess.

What is it with some of you guys? Why do you feel the need to to thrust yourselves up to a position of supposed superiority over fellow posters? Dr. Marten has laudably chosen to engage himself in a thoughtful analysis excercise. So what if someone's done it already, or it's not your idea of fun. Give the guy a break, or better yet, a hand. This is not place for mental flexing and posturing. Let's keep this a positive and constructive forum and leave your personal biases out of it.

Ooh! He told you! And you! And You, too!

"What is it with some of you guys? --- Let's keep this a positive and constructive forum and leave your personal biases out of it."

And YOU TWO are hiding under your desks aka 'Guests' name!

I don't think the good Doctor has been hurt by my polite comment expressing a preference. The comment was relevent in that it pointed out another game with a large number of permutations, if you even understand what that means. I did not pass judgement on his behavior as you now do on mine. If you really want to know what I think it is that generally speaking and more and more so GUESTS SUCK. Whether too lazy to sign up or too weak to not need to hide behind the anonymity of guest status or maybe even members who log on as guests I wish there were not such an option to do so. People like you abuse the status when you come in with your critical pot shots and from the safety of no identity you can be rude, as many of you are. You can kiss my rear as far as I'm concered.

I'm working on the next level of sudoku.

It uses hexadecimal 0 to F with a 4 by 4 layout...

Even I am having trouble doing it and I'm a sudoku maniac!!

John

Elektor magazine by any chance. Yes it's me again.

Is Elektor magazine still going Brainwave??

The last issue I saw must have been in the 70s

John.

Very much so they run a competition using Hex for their Sudoku. It is now Elektor Electronics also available on the web.

Hi All,

Me again ( wiv me BIG boots on ).

Anyway, i am rarely hurt at all by comments in post threads, just to let you all know.

What if you had a 36 x 36 grid using the characters 0 to 9 and the letters A..Z and a..z? With 36 sub-grids of 6 X 6 character spaces. How many permutations then?

I am after the "thought" process you might use to come up with the total number or permutations really, for ANY size of Sudoku grid, as a PROGRAMMING exercise, no it's not homework!!

It is all down to curiosity really!!

I have created a small VB.Net program that iterates from 12456789 to 987654321 and spits out all the numbers where each digit is different.

It takes ages though, just to do that!! :-(

I'm off to try the same question on two programmers forums....

Regards,

Dr M.

(Stomping off in BIG 'bovver' boots....)

Hi ALL,

'Here is the code anyway ( that i mention in my previous post ).>>

Dim num(9) As Integer

Dim numString(9) As String

'Dim possNums(9000000) As Integer

Dim possString As String

'Dim sw As New StreamWriter("C:\myNumbers.txt")

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim count, index As Integer

For index = 123456789 To 987654321

If (uniNum(index) = True) Then

count += 1

'possNums(count) = index

TextBox1.AppendText(count.ToString & " " & index.ToString & vbCrLf)

'sw.WriteLine(count.ToString & " " & index.ToString & vbCrLf)

End If

If count Mod 50 = 0 Then TextBox1.Clear()

Next

'sw.Close()

MsgBox(count.ToString)

End Sub

'Test to see if number is like 123456789 or 987654321

'where each digit is different.

Private Function uniNum(ByVal num As Integer) As Boolean

Dim numS(9) As String

Dim str1 As String

Dim index1, index2, index3 As Integer

str1 = num.ToString

For index1 = 0 To 8

numS(index1) = str1.Substring(index1, 1)

Next

For index2 = 0 To 9

For index3 = 0 To 9

If index2 = index3 Then GoTo SkipTest

'See if the number 'num' contains a "0"

If numS(index2) = "0" Then Return False

'Compare each number in the number 'num' with itself.

If numS(index2) = numS(index3) Then Return False

SkipTest:

Next

Next

If index2 = 10 And index3 = 10 Then Return True

End Function

Whooo! I'll stick to the crosswords, thanks.