Ruud,
is there a special reason why you removed the empty grid on the printer friendly page of clueless and explosion? It was such a good aid for me, now I have to draw it on my own again, and you know that I'm lazy.
Somehow you also changed the size of those puzzles on the printer friendly pages, with my "normal" settings (size 100%) the sudokus 3, 6 and 9 were cut off. If I resize it (size 80%) the cells are very tiny and I get problems with my pencilmarks. Is this now a new level of difficulty?
Peter