## double turbot

Advanced methods and approaches for solving Sudoku puzzles

### double turbot

Just for fun (and to be the first one), i may introduce to you the double turbot technique.
Suppose you have the following in the boxes 1 and 2, where '*' means, there may be any candidates (also 3).
Code: Select all
`16  *   *  | *  36  14 |25  *  1256| 45  *  23 | * 123 1256| *   *   * |`

Then r3c2 is 3.

To clarify the technique, this is the beginners version:
Code: Select all
`15  *   *  | 12  45  * | *  *   24 | 12  45  * |45 123  *  |  *  *   * | `

I leave it up to you to classify all the variations of this fabulous technique
Wolfgang

Posts: 208
Joined: 22 June 2005

Can you explain a bit more? Why do you call this double turbot? Has it got something to do with turbot fish?
Jeff

Posts: 708
Joined: 01 August 2005

Look at the chains from [2,5] in R2C1
stuartn

Posts: 211
Joined: 18 June 2005

### Re: double turbot

Thanks, thats where the name is from, but i think, for the next step i have to change it: we drop box 2.
Code: Select all
`16  *   *  | 25  *  1256|  * 123 1256| `

Then r3c2 is 3.
Wolfgang

Posts: 208
Joined: 22 June 2005

### Re: double turbot

Wolfgang wrote:Thanks, thats where the name is from, but i think, for the next step i have to change it: we drop box 2.
Code: Select all
`16  *   *  | 25  *  1256|  * 123 1256| `

Then r3c2 is 3 (the name is quad - badly constructed sample).
Wolfgang

Posts: 208
Joined: 22 June 2005