Black Box Paths       Home  

These are Ken Duisenberg's Black Box Path Puzzles.
Choose a puzzle from the drop down menu at top left.
Click non-numbered squares to change between blue and black.

The goal is to blacken the specified number (6 for 5x5, 10 for 7x7) of squares such that each square with a number has that many black neighbors.

(A "<" means it has too few, a ">" means it has too many,
an "=" means it's a Goldilocks square: just right.)

Furthermore: when you have the right number of black squares with the right neighbor counts, the remaining blue squares are to be connected by a single closed loop, passing through each blue square just once. When you choose the correct black squares, this loop or path will be shown in red.