What happen if you lost your king, and then you promote or you earn additional rook/knight/bishop in your base squares? One possibility is ignore it and allow it to happen anyways, one possibility is make it so the pieces are lost immediately when the pawn promotes or the other pieces are captured, but one more possibility is that the king is re-added onto a vacant space in the first row (1 for white, 9 for black), which provides you with an extra piece, but will still become vulnerable. This new king does not score any points. Next question: Which of these three ways works best?