Every player has distinct patterns that can be seen over time; some might have a preference for particular ranks or suits, while others might have particular methods for pislots to win real moneycking or discarding cards. Players who closely observe these patterns can learn a great deal about their opponents' hands & modify their tactics accordingly. An opponent's concentration on finishing a particular sequence or set, for example, may be indicated if they routinely discard cards from one suit while picking up others from another.
