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GeneralRe: Sounding off on the responses Pin
Jörgen Andersson19-Mar-18 2:05
professionalJörgen Andersson19-Mar-18 2:05 
GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 2:09
MemberMember 798912219-Mar-18 2:09 
GeneralRe: Sounding off on the responses Pin
W Balboos, GHB19-Mar-18 2:24
mveW Balboos, GHB19-Mar-18 2:24 
GeneralRe: Sounding off on the responses Pin
Jörgen Andersson19-Mar-18 2:30
professionalJörgen Andersson19-Mar-18 2:30 
GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 2:07
MemberMember 798912219-Mar-18 2:07 
GeneralRe: Sounding off on the responses Pin
W Balboos, GHB19-Mar-18 2:17
mveW Balboos, GHB19-Mar-18 2:17 
GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 2:29
MemberMember 798912219-Mar-18 2:29 
GeneralRe: Sounding off on the responses Pin
W Balboos, GHB19-Mar-18 3:05
mveW Balboos, GHB19-Mar-18 3:05 
You really don't seem to get it - I do an analytical-only solution. All numbers for a given square are eliminated, except one.

No "what if" at all.

Should more more than one value exists they are NOT tried - one moves on to another part of the problem. Eventually, each square is uniquely defined and helps define other squares.

Play the board once - win-or-lose - yup. That's right. There are and endless supply of new boards to try. Who cares about any particular one?

In fact, if I stop because I am stuck, I have no way to know if the puzzle is even solvable (analytically) as it is only solvable (analytically) if the initial numbers allow for one and only one solution. A test I couldn't perform.

Your algorithm will always come up with a solution, even on invalid boards (boards with more than one unique solution).
Ravings en masse^
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010

GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 3:45
MemberMember 798912219-Mar-18 3:45 
GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 3:50
MemberMember 798912219-Mar-18 3:50 
GeneralRe: Sounding off on the responses Pin
W Balboos, GHB19-Mar-18 3:51
mveW Balboos, GHB19-Mar-18 3:51 
GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 3:54
MemberMember 798912219-Mar-18 3:54 
GeneralRe: Sounding off on the responses Pin
W Balboos, GHB19-Mar-18 4:00
mveW Balboos, GHB19-Mar-18 4:00 
GeneralRe: Sounding off on the responses Pin
Member 798912219-Mar-18 4:15
MemberMember 798912219-Mar-18 4:15 
GeneralRe: Sounding off on the responses Pin
PIEBALDconsult19-Mar-18 10:32
professionalPIEBALDconsult19-Mar-18 10:32 
GeneralRe: Sounding off on the responses Pin
PIEBALDconsult20-Mar-18 10:49
professionalPIEBALDconsult20-Mar-18 10:49 
GeneralRe: Sounding off on the responses Pin
W Balboos, GHB21-Mar-18 1:17
mveW Balboos, GHB21-Mar-18 1:17 
GeneralRe: Difficult-to-solve Sudoku wanted Pin
Fueled By Caffeine19-Mar-18 3:23
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GeneralRe: Difficult-to-solve Sudoku wanted Pin
Member 798912219-Mar-18 3:33
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GeneralRe: Difficult-to-solve Sudoku wanted Pin
PIEBALDconsult19-Mar-18 5:02
professionalPIEBALDconsult19-Mar-18 5:02 
GeneralRe: Difficult-to-solve Sudoku wanted Pin
Member 798912219-Mar-18 5:57
MemberMember 798912219-Mar-18 5:57 
GeneralRe: Difficult-to-solve Sudoku wanted Pin
PIEBALDconsult19-Mar-18 8:59
professionalPIEBALDconsult19-Mar-18 8:59 
GeneralRe: Difficult-to-solve Sudoku wanted Pin
Dezhi Zhao19-Mar-18 5:21
MemberDezhi Zhao19-Mar-18 5:21 
GeneralRe: Difficult-to-solve Sudoku wanted Pin
Member 798912219-Mar-18 6:16
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GeneralRe: Difficult-to-solve Sudoku wanted Pin
Dezhi Zhao19-Mar-18 7:15
MemberDezhi Zhao19-Mar-18 7:15 

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