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Are you a fan of Suguru? Then you'll probably love my new RIPPLE EFFECT puzzles, available in printable and interactive versions. Check 'em out!

Intermediate Hexadecimal Sudoku (1-16), Volume 7

Each booklet contains a collection of eight different puzzles, 1-per-page, with a page of hints and a page of answers in the back. The booklets are ordered by ascending difficulty -- the puzzles in book 100 are much harder than the puzzles in book 1.

These puzzles are in PDF format and can be printed from your browser or the desktop. Problems printing puzzles? Try these work-arounds.

Out of intermediate puzzles? Just ask -- I'll make more!