Every time a player discards a card, they reveal details about their strategy & hand. By monitoring which cards are being picked up by opponents and which are being discarummy online 51rded, astute players can manipulate this information to their benefit. If an opponent picks up a 6 of diamonds and discards a 5 of diamonds, for instance, it might mean that they are working on a diamond sequence. Because it might prevent their possible melds, it might be beneficial in this situation to hold onto the 4 or 7 of diamonds.