we turn coffee into puzzles

Barnes and Noble Sudoku contest puzzles These three puzzles appeared at the Barnes and Noble store in Harrisonburg, Virginia as contest puzzles during a Brainfreeze Puzzles authors' signing and Sudoku Workshop, July 2007.

Pyramids The numbers 1--9 must each appear exactly once in each row, column, block, and pyramid. This puzzle has difficulty level 1 of 3.

Jigsaw The numbers 1--9 must each appear exactly once in each row, column, and jigsaw region. This puzzle has difficulty level 2 of 3.

Worms The numbers 1--9 must each appear exactly once in each row, column, and block. In addition, each worm should consist of an increasing sequence of numbers from tail to head. For example, a worm of length four could contain the numbers 2, 5, 6, and 8, in that order from tail to head. Green worms have their heads marked with eyes, but blue worms don't; you have to figure out their direction. This puzzle has difficulty level 2 of 3.