Event = {Invalid PlyCount}
[start]                 -+<LONG
[1w]                    (1w) e4 (#hm=0)
[1b]                    (1b) e5 (#hm=0)
[2w]                    (2w) Nf3 (#hm=1)
+---+---+---+---+---+---+---+---+
| r | n | b | q | k | b | n | r |
+---+---+---+---+---+---+---+---+
| p | p | p | p |   | p | p | p |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   | p |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   | P |   |   |   |
+---+---+---+---+---+---+---+---+
|   |   |   |   |   | N |   |   |
+---+---+---+---+---+---+---+---+
| P | P | P | P |   | P | P | P |
+---+---+---+---+---+---+---+---+
| R | N | B | Q | K | B |   | R |
+---+---+---+---+---+---+---+---+
b KQkq -
{Line}{3 plies}