Example Sudoku taken from World Puzzle Federation Sudoku Grand Prix

2014 Round 2 Puzzles 4, 5, 6
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Sudoku%20Round2.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Sudoku%20Round2_sol.pdf

2014 Round 3 Puzzles 4, 5
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Sudoku%20Round3.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Sudoku%20Round3_sol.pdf

2015 Round 2 Puzzles 7, 9, 10
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound2.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound2_SB.pdf

2015 Round 3 Puzzle 9
Puzzle: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound3.pdf
Solution: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound3_SB.pdf

2015 Round 4 Puzzle 7, 9
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound4.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound4_SB.pdf

2015 Round 5 Puzzle 7
Puzzle: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound5.pdf
Solution: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound5_SB.pdf

2015 Round 6 Puzzle 9
Puzzle: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound6.pdf
Solution: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound6_SB.pdf

2015 Round 8 Puzzles 7, 8
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound8.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2015/2015_SudokuRound8_SB.pdf

2016 Round 1 Puzzles 8, 9
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound1.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound1_SB.pdf

2016 Round 2 Puzzles 8, 9, 10
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound2.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound2_SB.pdf

2016 Round 3 Puzzle 7
Puzzle: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound3.pdf
Solution: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound3_SB.pdf

2016 Round 4 Puzzles 6, 7
Puzzles: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound4.pdf
Solutions: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound4_SB.pdf

2016 Round 8 Puzzle 6
Puzzle: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound8.pdf
Solution: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2016/2016_SudokuRound8_SB.pdf

2017 Round 1 Puzzle 11
Puzzle: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2017/2017_SudokuRound1.pdf
Solution: https://gp.worldpuzzle.org/sites/default/files/Puzzles/2017/2017_SudokuRound1_SB.pdf