can be found in attached pdf-file.

source: http://cs.sudokucup.com/

source: http://cs.sudokucup.com/

source: Krtek (FED párty a Poděbrady)

source: Krtek (Poděbrady)

source: http://cs.sudokucup.com/

source: Krtek (Poděbrady)

source: Krtek (fed-sudoku)

source: http://cs.sudokucup.com/

source: Krtek (fed-sudoku)

source: Krtek (fed-sudoku)

source: Krtek (fed-sudoku)

source: Krtek (fed-sudoku)

source: Krtek

source: Krtek

source: WSC 2010 booklet

source: logicmastersindia

source: http://cs.sudokucup.com/
example will be presented in the competition pdf-file

source: slovaksudoku

source: logicmastersindia

source: http://cs.sudokucup.com/

source: Krtek (fed-sudoku)
... can be found on a separate page.