Series of games based on HI-Q - board game you play alone like a brain teaser. It's played by jumping one peg over another peg to remove the peg that was jumped. The game ends when you either have no moves left (you can only move by jumping) or when you win by having either one peg left or one peg left and in the center.
There are many variations for 1 or more player
Many of these games has produced by Gabriel in 70s or Ideal in 80s