If you think your opponent is about to win, you might want to play defensively by throwing out cards that won't help them finish their melds. For example, it might be prudent to hold onto higher-ranking cards that might potentially interfere with your opponent's planswolf run slots while simultaneously working on finishing your own melds if they have been regularly discarding low-ranking cards. To succeed in Rummy Mars 41, you must modify your strategy according to the playing styles of your opponents. Every player has a different style of play, and understanding these variations can help you figure out how to best counter their tactics. Hold onto high-value cards until they are less likely to be useful, for example, if you are playing against an aggressive player who regularly draws from the discard pile.