Copyright (c) 1976 Matt Crispis
This game is played on an 10x7 square board with the following setup.
The stack can move in the 1-2-3-4 combination of diagonal directions, leaving one stone on each cell.
In this sample, the stack returns one stone to the initial cell.
In the top diagram, black can capture the white stack by moving its stack of size 3.
He moves the stack SE, SE and NE landing on a single stone.
Since the white stack is surrounded by all sides, it is captured.
Some words from the author: [Intermedium] is simple to learn, but may lead to complicated situations that require deep analysis and forward thinking. Single pieces do no move, but they are useful a stepping stones for your captures. And they may become alive by putting another piece over them. Before you master the game, avoid early attacks against the City that may prove costly. Build up your strength gradually and evenly by dominating, if possible, the center. You should also avoid building 'formidable' stacks of six or more pieces - if taken you may lose the game at one stroke. Leave some forces behind to defend your City in case of emergency.