In requirement 4a, can you give me an example of how to change the rules of a game?

Sure – let’s take chess as an example. One of the standard ways to change the rules is to limit the amount of time a player may take for their moves – this is commonly known as ‘speed chess.’ If a player runs of time, they lose, no matter what their position is on the board or which player still has the most pieces. Another variation, standard in Shogi, is that instead of moving a piece, you can put a captured piece back on the board as your own (if you did this with standard chess pieces, you would have to somehow mark the piece to show that it was operating as a different color). Finally, you could change the movement of different patterns – like adding the ability to go one square side to side and front to back to the bishop or one square diagonally to the rook.