Saying a captured piece returns to the 'starting position' is a bit confusing, as one could easily understand it to mean 'the square where it was in the initial setup'. Better just say that a captured piece is 'put on the square its capturer came from'.
The name of the variant seems a bit lengthy. Perhaps you should call it just 'Conquer'. (Or perhaps 'Abduct', 'Convert' or 'Bribe' would describe it better.) That you would be fighting the opponent's army is sort of self-evident.
This way of recycling pieces is a nice alternative to piece drops. It does seem to invite perpetual recapture, though. E.g. if a Rook is attacked as well as protected by a Rook, these Rooks could continue capturing to the same square forever, while not capturing could leave you down a Rook. Perhaps some rule against repetition is needed. Like that you cannot make the same move as the previous times the same position occurred.
Saying a captured piece returns to the 'starting position' is a bit confusing, as one could easily understand it to mean 'the square where it was in the initial setup'. Better just say that a captured piece is 'put on the square its capturer came from'.
The name of the variant seems a bit lengthy. Perhaps you should call it just 'Conquer'. (Or perhaps 'Abduct', 'Convert' or 'Bribe' would describe it better.) That you would be fighting the opponent's army is sort of self-evident.
This way of recycling pieces is a nice alternative to piece drops. It does seem to invite perpetual recapture, though. E.g. if a Rook is attacked as well as protected by a Rook, these Rooks could continue capturing to the same square forever, while not capturing could leave you down a Rook. Perhaps some rule against repetition is needed. Like that you cannot make the same move as the previous times the same position occurred.