Copyright (c) ? T. R. Dawson

This game is played on an empty 3xN square board:

SOLDIER - Each soldier move one cell forward, if it is empty. They capture enemy soldiers on the diagonal forward cells (left or right). Capture is mandatory.
GOAL - Wins the player that makes the last move.

Pawns can never reach last rank. They get on the ways of each other, until someone has no soldier left to move.

An example

After a1-a2, White must capture b3:a2, and Black must reply b1:a2.

You can check more information about Dawson's Chess at this page. Here is an JavaScript program with another way to see this game.