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Practice puzzles for the Dutch round of the Sudoku Grand Prix 2021

Practice puzzle #1 (Kropki): 2712 Sudoku – Kropki RS 3 3-5-21

Practice puzzle #2 (Position Sums): 2714 Sudoku – Positiesommen AB 3 4-5-21

Practice puzzle #3 (Mathrax): 2716 Sudoku – Mathrax WZ 4 5-5-21

Practice puzzle #4 (Sum Set): 2718 Sudoku – Sum Set TGK 5 6-5-21

 

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