This small tool creates a Popeye file to test
a "handicap" proofgame from a given position in Forsyth notation
in which one side has given a piece as handicap, but we don't know which side and which piece. So it is using the by using the a=>b stipulation and processes all possible start positions using the next command.
The tool removes useless tests for unmoved pawns (eg: 12 unmoved pawns), pawns moved one step with unmoved neigbours (eg d3 and c6), unmoveable bishops (eg: f1,c8,f8) and caged rooks still there in the end position (eg h1,a8,h8).