Court piece AKA hokm, rung/rang, seven hands, hok, trumps or troefcall is a card game which originated in South Asia. The game is played between 4 players, 2 on each side as a team, the player with the most senior (highest) hand leads the trick. After receiving the first 5 cards one of the player decides the trump suit (rung) and the trump caller leads the first trick. The rest of the players have to follow the suit, if they don't have a particular suit they can throw another card, the player with the highest card wins the trick and leads the next round. The object of the game is to win a minimum of seven or more tricks. If a team wins all of the 13 tricks it is known as 52 court.
There are some variations of the game, most common ones include; Single Sar, Double Sar and Hidden Sar. Single sar is an easy variant, it follows the basic rules of rung, a player decides and calls the trump suit/rung and cards are picked up by the most senior player, one with the highest card in the trick. The game is played until a team wins a minimum of 7 or more tricks. In Double sar tricks are not automatically collected by the winner as in Single sar variation instead a player needs to win 2 consecutive tricks to collect the cards. Hidden rung is like double sar but it features a hidden card, the trump caller keeps the rung card turned face down. The rung card is not reveled until the declarer or one of the other players requests for the card to be revealed.
There are many court piece/rung games available online, i personally use and play Court Piece - My Rung & HOKM developed by Artoon Solutions Private Limited, available both on Google play store and Apple app store.
Download on Google play store
Download on Apple app store