the other option is to google sudoku solvers :p

XD but i want to know how u arrived at the answer.. from my sudoku picture..

=O i had so much faith in your solutions!

Description of www.sudokusolver.co.uk looks good (solve by logic) but it wont load for me ><

Well, the rule of sudoku is that every 3x3 square can only contain numbers 1-9. Each row across the whole 9x9 and column can only house numbers 1-9.

So if you have a 1 on the top left corner you can't have that same number across and down. It's hard to explain cause I just do it... lol. It's mostly a process of elimination and what fits. Usually if I have 3-4 empty boxes left I can figure out a whole 3x3, column or row... .__. Bleh.

hmmmmm i need to explain to my colleague how i got my answer... why a number has to be in that square and not another number........

I thought i've tried eliminating all the squares but.. nothing will come out ><

I've done really hard ones where you are left with boxes that you have to guess. Pretty much everything is left as it can be this or this. I go with the rule, nothing is every easy.

Then you get to the really hard ones that are like 5 sudokus in 1
or weird shapes that split each box into triangles or a hexagonal sudoku xD
and also sudoku which uses the alphabet
there are also those 3D cube sudokus too :zomg:
_____________________

I was bored at work...
here's my solution to the Sudoku
http://img50.imageshack.us/my.php?image=sudokuwr6.jpg

Hessah, I would LOVE to say that the answer (for everything, really) can be directly obtained by logical reasoning. However, the reality is that we sometimes have to resort to trials and errors. We can, though, limit the number of trials. In all sudokus of this level, I always manage to nail it down to 2 possible pathways. I try one and if it doesn't work, the other one is definitely the road to victory. The trick is to choose which 2 pathways. Usually, it's two boxes in one 3x3 square that one number can go in and if either box is filled, it must also reveal the others in the puzzle, until you encounter a contradiction where the same number turns up twice in a row, column or a 3x3 square (when you choose the wrong path) or complete the puzzle (if you happen to choose the correct path in the first place). If you make a bad choice, the box that is filled in won't lead to many others and you end up stuck again.

I think completing a sudoku with a trial and error is meaningless....

Coz you can punch in the number and click "Check" on the website anyway, so it kinda defeats the purpose of working it out.

If this is one of those where I have to do a trial and error then... this sudoku fails! HAHA

I was trying to see if anyone outside my office sees a logical way to solve this without having to guess. Coz i've watched my colleague work another Sudoku out a way that i've never used before, its like a new "strategy" that helps me work out new stuff, so... I was hoping that someone could open my eyes on other ways of thinking.

Thanks to those who's tried it for me!!!! :cheeky:

lol, not exactly. the way i said it means that you have to work out everything logically the whole way except the crucial step where you have two possible ways to get to the solution. As soon as you decide to take one route, it's logic all over again. So really, there's only one trial and error undertaken here (and to arrive at this stage is not obvious since you have to solve like half of the puzzle to see it). In the evil one, only one is the right one. In the diabolical one, BOTH ways give you the solution. I remember solving a few that have two solutions.

And I think I'm a bit like your boss, I rarely use small numbers because I know exactly which number goes in what cell.