Any tips on how to solve the difficult su-doku's puzzles?

Question

I am fine on the easy and moderate levels,but the hard su-doku's have got me puzzled
Help.....
All tips welcome.

Answer 1

http://www.soduko.org.uk/

This is a fun thing to help you solve hard puzzles.

Doesn't teach you how to do it but may help you to learn.

http://www.sadmansoftware.com/sudoku/techniques.htm

This site will give you various ways to learn and what sequences of numbers to help.

Answer 2

I like sudoku puzzles a lot. I solve almost all of them by checking each horizontal line first (which numbers are missing?), Then I check the vertical line, (which numbers are missing?). And then finally I check which ones are already there - sometimes you just got to see how many open options you have, use a pencil - usually it takes a few tries before you are on a sudoku role on the difficult levels =) I hope this helps.

Answer 3

Very simple, it is a matter of using logic. First set out to complete the matching single numbers in the rows and then attempt to complete each of the nine inner boxes. You should "logically" never make a mistake because in any mathematical problem 'two add two' will always equal four.

Answer 4

write it on a peice of paper in pencil and then if you get it wrong you can erase it and start again but remember you must have 1 to 9 in each colum down and across so if you have nine on the top line you cannot have nine anywhere else on the top line and the same down good luck

Answer 5

Easy - look at the answers in the next day's paper!

Answer 6

Do not do them in the first place.

Answer 7

simplest thing to do is don't do them then you wont have to ask daft questions about to solve them