When an opponent routinely removes hearts from the discard pile while discarding other suits, for instance, it is likely that they are working on a heart set or sequence. Changirummy welthng Your Approach. With this information, you can modify your approach appropriately, maybe keeping some cards that might help them finish their melds or discarding cards that will not help you but will also impede their progress. Effectively, read your opponents. You can gain a big advantage in the game if you can accurately read your opponents' moves.