That would be a separate infringement. Once Stockfish wins their case against ChessBase, it would likely mean easier wins on any other infringement cases. The

That would be a separate infringement. Once Stockfish wins their case against ChessBase, it would likely mean easier wins on any other infringement cases. The viral nature of the GPL and other copyleft licenses expressly allow this and put a healthy fear of improper OSS reuse and deployment in most rational software companies.