The New Sudoku Players' Forum

[Guest]

Is it possible to work out a grid using logic only, if not all numbers are represented in the frame at the start of the puzzle? I recently worked on a puzzle from the Telegraph and the number 8 was not identified at all in the grid - try as I might I cannot complete the puzzle using logic alone!! Can any one help?

[lunababy_moonchild]

Yes it is possible, because I've done it but then the puzzle involved was a Daily Mail puzzle, which, to all intents and purposes, doesn't provide too much in the way of challenge - IMHO. I don't recall seeing any other puzzle which didn't have at least one representative of any given number.

Post the puzzle and I'll see if I can give you a hint (she says, optimistically) as to the next move.

Luna

[Animator]

There are many that are missing numbers...

I recall one where there was no 6 and no 9... or where a box has no numbers at all, that usually isn't a problem...

[RFB]

Is it possible to work out a grid using logic only, if not all numbers are represented in the frame at the start of the puzzle? I recently worked on a puzzle from the Telegraph and the number 8 was not identified at all in the grid - try as I might I cannot complete the puzzle using logic alone!! Can any one help?

To provide a valid puzzle 8 of the 9 numbers must be present in the initial clues. If there are two (or more) missing numbers then those numbers would be interchangeable in the solution.

[Guest]

Also Dot, you should be aware that the Daily Telegraph regularly publish puzzles that require trial and error to complete - normally the Diabolical ones.