DUPLO

Copyright (c) 2002 Walter Joris

This game is played on a 8x8 board:

 

SETUP - Initially, each player drops two friendly stones on empty cells. TURN - On each turn, each player expands a connected line of one or more friendly stones. A line of stones expands by doubling its size in one of the two directions it is defined. If the expansion would find the edge of the board, the move is invalid. If the expansion finds an enemy stone which belongs to a line smaller than its own, the first enemy piece is transformed into a neutral stone. If the enemy line is equal or larger, the expansion is invalid. GOAL - When the board is full, wins the player with more friendly stones.

 

	Line Expansion The black line can expand into the green dots (always doubling its initial size). Of course, each one of this stones can be seen as a line in the other directions (e.g., stone b7 could expand to b6). However it is not valid to break the horizontal line and expand, say, only the two rightmost black stones. The diagonal white line cannot expand because it would find the edge first.
	Line Expansion with Capture If it is White's turn, he can expand his line to the right and transform the marked black stone in a neutral stone. If it is Black's turn, he could expand his vertical line to the top and break the white line in two, by neutralizing c6.

This game can be played with just pencil and paper. It is presented at 100 Strategic Games for Pen and Paper by Walter Joris.