Instructions, puzzles, sudokus and solutions of the Dutch Championships 2021
Instruction booklet: IB 2021 (Nederlands) IB 2021 (English)
Puzzle booklets:
Sudoku:Round 1 Round 2
Puzzle: Round 1 Round 2
Solution booklets:
Sudoku: Sol Round 1 Sol Round 2
Puzzle: Sol Round 1 Sol Round 2