The puzzle is: 

   * * 1  2 * *  * 8 *
   * 8 *  * 6 *  * 9 *
   6 * *  * * *  1 * 4

   * * *  * 9 *  2 * 8
   * * *  6 * 5  * * *
   9 * 7  * 2 *  * * *

   2 * 4  * * *  * * 9
   * 7 *  * 5 *  * 6 *
   * 9 *  * * 1  3 * *

The solution is: 

   4 5 1  2 3 9  7 8 6
   7 8 3  1 6 4  5 9 2
   6 2 9  5 8 7  1 3 4

   1 6 5  7 9 3  2 4 8
   8 4 2  6 1 5  9 7 3
   9 3 7  4 2 8  6 1 5

   2 1 4  3 7 6  8 5 9
   3 7 8  9 5 2  4 6 1
   5 9 6  8 4 1  3 2 7

Rules used:

   Naked Single
   Hidden Single
   Locked Candidate Single Line
   Locked Candidate Multiple Lines
   Naked Pairs
   Hidden Pairs
   Naked Triples
   Swordfish
   Forced Chain Convergence
   Forced Chain XY