This game which is very popular in India Pakistan and Iran has several names.
The name Court Piece is sometimes written as Coat Piece or Coat Pees.
In Pakistan this game is often known as Rang which means trump.
In Iran it is known as Hokm which means command or order.
In Suriname and Netherlands known as Troefcall.

This application has three variations of the game :-
Single Sar and Double Sar.
And Double Sar with Ace Rule.
Hindi or Punjabi word 'Sar' is used for a trick means a set of cards one played by each player in turn.

All the instructions are included in the Help.