Players can learn a lot about their opponents' hands and modify their own tactics by keeping an eye on the cards they discard or pick up. You can concentrate on crrummy new 51 bonuseating your own melds without worrying about interference if, for example, your opponent routinely discards cards from a specific suit, suggesting that they are not pursuing runs in that suit. Also, preserving valuable cards until the ideal time can reduce the likelihood of penalties while generating chances for big scoring.
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