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.