When a Diagram is pasted in the (old) PTA, and you generate GAME code from it, piece types that are not on the board won't be mentioned in the custom set that is generated.
If I see it correctly, this seems to be the case. Here is an excerpt of the generated code, which concerns the part of the pieces that are not on the board (royal pieces - markings in the text are mine):
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal pawn</td><td>slides orthogonally, slides to the 2nd square straight ahead for capturing only, or steps one square straight ahead</td></tr>
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal amazon</td><td>slides in all 8 directions, slides in all 8 directions, or makes a knight's jump</td></tr>
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal chancellor</td><td>steps one square in all 8 directions, castles by stepping 2 squares towards the king (fast castle), makes a knight's jump, or slides orthogonally</td></tr>
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal archbishop</td><td>steps one square in all 8 directions, castles by stepping 6 squares towards the king (fast castle), makes a knight's jump, or slides diagonally</td></tr>
If I see it correctly, this seems to be the case. Here is an excerpt of the generated code, which concerns the part of the pieces that are not on the board (royal pieces - markings in the text are mine):
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal pawn</td><td>slides orthogonally, slides to the 2nd square straight ahead for capturing only, or steps one square straight ahead</td></tr>
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal amazon</td><td>slides in all 8 directions, slides in all 8 directions, or makes a knight's jump</td></tr>
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal chancellor</td><td>steps one square in all 8 directions, castles by stepping 2 squares towards the king (fast castle), makes a knight's jump, or slides orthogonally</td></tr>
<tr><td width="35"><img src="/graphics.dir/alfaeriePNG/wking.png"></td><td>royal archbishop</td><td>steps one square in all 8 directions, castles by stepping 6 squares towards the king (fast castle), makes a knight's jump, or slides diagonally</td></tr>