Forsyth 2 Pieces
This small tool converts a chess diagram from Forsyth notation into Popeye's pieces format.
It accepts all initials of pieces from A-Z for white pieces and a-z for black pieces.
Code and sample problem (ser-h#8, version by Ravi Shankar) by Alain Brobecker

Forsyth:

English     Français     Deutsch         Exchange N and S

Pieces:  


Popeye's English one letter pieces (fairy pieces' definitions at Chess Problem Database)
      CCardinal
BBishopFFriend
KKingGGrasshopper
SSpringer (instead of N for kNight)LLocust
PPawnMMoose
QQueenNNightrider
RRookOOrphan
ZZebra

If you're interested in chess proof games, retrograde analysis and computing, see also:
The retrograde analysis corner by Otto Janko
Chess Problem Database
Popeye by many authors
Jacobi and chess problems by computer by François Labelle
Natch and iNatch by Pascal Wassong
Euclide by Etienne Dupuis
Retractor by Chad Whipkey and Theodore Hwa
The retro mailing list
The website of Václav Kotesovec
The website of Andrew Buchanan
The website of Eric Angelini

My own page with chess problems