Links

Puzzle Organisations

• Logic Masters Deutschland
• UK Puzzle Association – [Forum]
• World Class Puzzles NL

Interactive Puzzles

• Angela & Otto Janko
• Fed-Sudoku
• Gareth Moore’s Puzzle Mix
• Puzz.link
• Puzzle Square JP
• sudokucup.com

Puzzle Publishers

• Grandmaster Puzzles
• Slovak Sudoku
• Sudoku Xtra Magazine
• The League of Extraordinary Ladies and Gentlemen – [Play online]

Blogs (active)

• Ashish Kumar
• Antonis Lalatsas
• David Millar’s The Griddle
• Fred Stalder (Fred76)
• Grant Fikes (mathgrant)
• Rishi Puri (purifire)
• Robert Vollmert
• Tawan Sunathvanichkul

Blogs (inactive)

• Bastien Vial-Jaime (Ours brun)
• Bram de Laat (Para)
• Nikola Živanović
• Palmer Mebane (MellowMelon)
• Rohan Rao
• Prasanna Seshadri
• Serkan Yürekli
• Thomas Snyder (motris)
• Zoltán Horváth (Valezius)

Sadly Deceased

• CrocoPuzzle – [English guide]
• nikoli.com – subscription