The -size parameter will change the size of the board.
The default size is 8x8. A single number will make a square board
with that number of rows and columns.
A rectangular board will be make if the size is in the format "ROWSxCOLUMNS".

Movement and Capture:

Pieces move 1 space straight or diagonally forward.
You may only capture when moving diagonally.

Move Notation

Since there are only three spaces a piece can move to the
move notation is simply "[row][col][LFR]", where [LFR] is
'L' for forward-and-left, 'F' for straight forward, and
'R' for forward-and-right. For example, "E2F" means
"more the piece at E2 forward 1 space", and "C7R" means
"move C7 diagonally forward to the right".

You may also use a "source-destination" notation.
For example, "E2-E3" or "C7-B6".