This brief tech note shows the types of moves the READCHS will
recognise and interpret:

pawns
-----
    hxg6 ed4 g3 cd

Pieces
------
    Naxc6  R1xb5  Bag1  Q1g2  Bxc8  Rc1  Ra4-a6  Ra4xc4

Promotions
----------
    exd8(Q)  exd8Q  d8(Q)  ed8=Q  exd8Q  d8=Q  ed8Q  d1Q
    d7xe8(Q)  d2-d1(Q)

Castles
-------
    O-O-O  O-O  0-0-0  0-0

Others (Coord format)
------
    d1-d2  e4xe6

    [ anything here is a comment ]


ReadChs will process (ignore) any move interpretations like:
    1-0   0-1  1/2-1/2   «-«  ...  + - ? ! #