SUDOKU and other puzzles

• De achterkant van SUDOKU: oplossen, programmeren en ontwerpen
  In Dutch: boek geschreven door Hans Zantema, verschenen bij Aramith, Haarlem, oktober 2007, ISBN 978 90 6834 216 1
• Sudoku puzzles: hoe los je ze op en hoe maak je ze?
  In Dutch: presentatie op 4VWO dagen aan Radboud Universiteit in Nijmegen op 13 februari 2009 en 17 april 2009
• Variants on SUDOKU: 63 challenges
• Killer SUDOKU: 27 challenges
• SUDOconnect: a sudoku variant with a connectedness requirement. This is joint work with Walt van Ballegooijen; the idea of considering this connectedness requirement is due to Hans Kuiper.
• Link: latin squares with a connectedness requirement.
• Futoshiki puzzles.
• Lightup puzzles.
• Slitherlink: 60 newly created puzzles with solutions. These are of different sizes and increasing difficulty. Apart from that there is a second set of Slitherlink: 28 newly created puzzles with solutions, all of size 7x7.