No Donkey Step Sudoku 2013 - 1

Today's puzzle is also part of the Daily League competition going on at Facebook.

The group comprises of some great creators from across the globe. Today is my turn to create a sudoku for the group.

The sudoku is a No Donkey Step Sudoku.

Rules of classic sudoku apply. Additionally a number cannot repeat within 2 cells from itself in any direction, even diagonally.