## X-Cycles

Advanced methods and approaches for solving Sudoku puzzles

### X-Cycles

Could somebody provide me with some puzzles that require X-Cycles to solve. They were needed for two 'fiendish' puzzles I have solved in the last week or so and I would like to practice the technique.
Willie

Posts: 2
Joined: 08 August 2008

Try the Zoo - puzzles identified as two or three strong links. There are both simple and grouped examples.
Mike Barker

Posts: 458
Joined: 22 January 2006

### Re: X-Cycles

Willie wrote:Could somebody provide me with some puzzles that require X-Cycles to solve. They were needed for two 'fiendish' puzzles I have solved in the last week or so and I would like to practice the technique.

This puzzle requires an XY-Wing, a Turbot-Fish and 3 Bi-directional X-Cycles.

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

It is very difficult to spot puzzles which have the X-Cycle as only advanced strategy. I hope you know the other Strategies too.

With best wishes

Claudia
claudiarabia

Posts: 288
Joined: 14 May 2006

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

the x-cycle is on candidate 7
storm_norm

Posts: 85
Joined: 27 February 2008