Hi! This is not something which is forced, but in this version we play with the "swap rule". It means that at start the first player put a blue piece AND an orange piece on the board, then the second player decides if he wants to play the entire game as blue or as orange (in both case blue is playing now). This is the best way to have a game which is not a strong advantage for first player and it allows to try some special openings like using very small piece at start for both player.
