WPF Grand Prix 17
WPF Sudoku Grand Prix 2017
WCPN (actually: Richard Stolk & Arvid Baars) created all the puzzles for the first WPF Sudoku Grand Prix in 2017
Puzzles
Solutions
WPF Puzzle Grand Prix 2017
WCPN (actually: Bram de Laat) will create all the puzzles for the 7th WPF Puzzle Grand Prix in 2017.