Number Place Trainer

Number Place, or Sudoku is widely known puzzle game. Number Place Trainer is an application for those who want to skill up on Number Place. Number Place Trainer provide puzzles which will need solving techniques called 'Locked Candidate', 'Naked Pair', 'Naked Triple', 'Hidden Pair', 'X-Wing', 'Sword Fish'. In the Application, 'Tuple' means Naked or Hidden pair, triple, or more.

The menu item, Locked Candidate will need solving techniques called Naked Single, Hidden Single and Locked Candidate.
The menu item Tuple will need techniques called Naked Pair, Naked triple, and larger tuples adding to the techniques needed by Locked Candidate.
The menu item X-Wing will need the technique X-Wing adding to the techniques needed by Tuple.
The menu item Sword Fish will need the technique Sword Fish adding to the techniques needed by X-Wing.
The menu item More Practice will need all above
techniques and may need more.

Hint will show the technique to be used and the numbers to be deleted from candidates.