The Ideea needs to be improved
Hi Mohammed , nice to meet you and looking forward to know your real nationality as it's goo to find muslims here, Now for your project I think you can make a strap which can put arround every players leg (ankle) which emmit a different pulse to identify the player (can do by their numbers) and a sensor as you said at the side lines of the court but be ware to make the sensor differs from the different teams' players and then it needs a referee to know if the player is involved in this play or not because as you know (if the player is in the offside position and he is not involved in this play so the referee doesn't judge as an offside.
Now nice to meet you and wish to share our ideas in the Future.
Yours, Aly (Digimaniac) :wink: