## How to speed up?

Everything about Sudoku that doesn't fit in one of the other sections

### How to speed up?

Hi all

Being blended by the solution times I`ve read, I wonder how one can speed up a little bit, eg. which skills have to be learned to "run" trough a sudoku puzzle.

What do you do after a first fast scan?

Thx!
DreamCH

Posts: 10
Joined: 10 June 2006

### sudoku skills

If you are up to date on the basic skills found at the websites below,
http://www.angusj.com/sudoku/hints.php
http://www.scanraid.com/BasicStrategies.htm

then your best bet would be to work with the numbers found most often in the grid noting 'locked candidates' and possible pairs, and work through the numbers 1 to 9.
Everyone has their own way, so have a go at different methods and see which works best.

Crazy Girl

Posts: 189
Joined: 08 November 2005

I`m familiar with most strategies up to X- Wing, but "running" trough a medium puzzle is still not possible for me.
This one:

Code: Select all
`47.........2...71..6.8......3.........9.7.1......258.454.....323..4.8..1.....6...   `

(how to show this is a grid?!)

Solved in 9 minutes...

DreamCH

Posts: 10
Joined: 10 June 2006

### How to speed up

DreamCH wrote:"...how to show this is a grid?!..."

To post a grid click on here
Cec
Cec

Posts: 1039
Joined: 16 June 2005

DreamCH,

Code: Select all
`------+-------+-------|4 7 . | . . . | . . . |. . 2 | . . . | 7 1 . |. 6 . | 8 . . | . . . |------+-------+-------|. 3 . | . . . | . . . |. . 9 | . 7 . | 1 . . |. . . | . 2 5 | 8 . 4 |------+-------+-------|5 4 . | . . . | . 3 2 |3 . . | 4 . 8 | . . 1 |. . . | . . 6 | . . . |------+-------+-------|`

solved in 6-7 minutes, just have to look out for locked candidates and consider each number in turn, you will find yourself getting better with practise.

If you look at the top three blocks, and you can deduce in Blocks 1 and 3 the number 3 is in Rows one & three, so therefore in the block 2, 3 must be in the middle row (looking/solving where 3 can go in the rest of the grid should be enough to determine where it can go in Block 2 Row 2). Simple techniques like these should be enough to solve this sudoku.
Crazy Girl

Posts: 189
Joined: 08 November 2005

Puzzle solved in 4:41.

Carcul
Carcul

Posts: 724
Joined: 04 November 2005

Hi Carcul

I wonder how you catch that much information in such a fast time!

Any special things you`re looking for?

DreamCH
DreamCH

Posts: 10
Joined: 10 June 2006

### How good is this method to solve sudoku with speed?

Has anyone tried this method to solve sudoku fast, posted at: http://www.howtodoubleyoursudokuspeed.com ? How good is it? Will it really help solve sudoku faster?
ganesansub

Posts: 1
Joined: 24 November 2006

### Re: How good is this method to solve sudoku with speed?

ganesansub wrote:Has anyone tried this method to solve sudoku fast, posted at: http://www.howtodoubleyoursudokuspeed.com ? How good is it? Will it really help solve sudoku faster?

No I haven't........ (by the way, there is no method there, just blah....blah.....blah & links).

The best way to speed your solving is to AVOID clicking on the link above. That will save valuable time which could be used to solve more sudokus.

tarek

tarek

Posts: 2697
Joined: 05 January 2006

It is affiliated to a site that sells an eBook called "How to solve every Sudoku". This book is 124 pages in font size 24 that comes up with the brilliant idea to write pencilmarks in the grid.

I agree with Tarek. Avoid this rubbish. If you want a good book about real solving tips, check out "The Logic of Sudoku" by Andrew Stuart.

Ruud