both the players have to use a single keypad...
I forgot the button that someone pressed needs to be constantly displayed at the receiver side. So you need some RS-latches.there is only one transmitter(or keypad) which both players have to use alternatively.
the distance is less than 2 meters between the transmitter and receiver.
the transmitter should somehow has to indicate which player turn it is...
the receiver has to give the result at the end of each game(this part of the problem is bugging me most, please give an idea about this)..
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by Wes Brodsky
by Luke James