Ripple Effect (puzzle)

For the sociological term, see Ripple effect. For the episode of Stargate SG-1, see Ripple Effect (Stargate SG-1).
Moderately difficult sample puzzle
© 2005-6 Adam R. Wood, licensed under GFDL

Ripple Effect (Japanese:波及効果 Hakyuu Kouka) is a logic puzzle published by Nikoli. As of 2007, two books consisting entirely of Ripple Effect puzzles have been published by Nikoli. The second was published on October 4, 2007.