A crucial element of Playship Rummy that has a significant impact on the game's outcome is prudent discarding. In addition to changing your own hand, every tirummyarme you discard a card, you also let your opponents know what you hope to accomplish. As a result, choosing which cards to discard requires careful consideration. For example, it's usually preferable to hold onto a card until you have a better idea of your opponent's hand if it might help them finish a run or set.
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