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Joe Joyce wrote on Wed, Mar 14, 2007 09:43 AM EDT:
The first part of our 'shortrange pieces for longrange boards' discussion
has given us 5 basic piece types with 5 simple symbols for easy
combination. Combine the wazir and dabbabah into the warmachine. The
dabbabah icon is a wheeled tower and the wazir icon is a plus sign, so the
warmachine is a wheeled tower with a plus sign on its side. The generic
piece can be identified like this: 'DW'. This identifies the components
without specifying any particular movement pattern. Now let's define some
movement patterns with the help of this example piece. Then we associate
symbols with these patterns. Again, to keep things simple, we'll use the
basic movement patterns discussed in TSRP. 
1] Or. The warmachine may move as either one of its components, that is,
like a wazir or a dabbabah. It steps 1 orthogonally or leaps 2
orthogonally. As this is the simplest movement pattern, it doesn't need
anything extra on the piece icon. So a combo icon with no info other than
the various piece symbols may move as any one of the pictured pieces. This
can be distinguished in writing by the slash '/' symbol. Our piece
appears on the board as a wheeled tower with a plus sign on its side, and
in writing, it looks like this: 'D/W'.
2] And [linear]. The warmachine may move as either or both of its
components, in either order. It may not change direction during this move.
To the basic 'DW' icon, we will add a square around the central symbol.
In writing, we will indicate this by D+W.
3] And [nonlinear]. The warmachine may move as either or both of its
components, in either order. It *may* change direction during this move.
To the basic 'DW' icon, we will add a circle around the central symbol.
In writing, we will indicate this by a 'plus/minus' symbol: D +/- W.
4] And-Or [two-step linear rider]. Our basic DW piece may move as either
of its components, then it may [or may not] move as either of its
components again. It may not change direction during this move. The basic
icon gets 2 'speed lines' on its side. Written, it uses the plus sign
between 2 of the [written] piece symbols: D/W + D/W
5] And-Or [two-step nonlinear rider]. Our basic DW piece may move as
either of its components, then it may [or may not] move as either of its
components again. It *may* change direction during this move. The basic
icon gets 2 speed lines connected by a crossbar, making a 'Z' on the
piece side. Written, it uses the plus/minus sign between 2 of the
[written] piece symbols: D/W +/- D/W.