Interaction

Interaction is a 1978 uncredited game, published by Waddingtons.

The game is played on the following 9x9 board without the four corners, with a middle row made of 'pockets':

Each player has two pieces (the cue balls) and there are ten neutral yellow pieces. The pieces are placed in any symmetric position.

Rules:

• On her turn, the player 'sends' a friendly cue balls in any one of the eight directions. The ball will travel, eventually bouncing the edges, until it hits another ball (of either color, or neutral). 
• If the ball hits a row of balls, only the farthest one starts moving
  
• The energy transferred to the new moving ball is the number of squares the previous ball has traveled
• A neutral piece landing or moving over a pocket is captured by the player
  
• The player's initial move is only valid if it hits at least one ball
  
• Wins the player that captures five neutral stones
  

A review from Games & Puzzles: