An opponent may be concentrating on creating particular sets or sequences if, for example, they routinely select particular suits or ranks from the discard pile. To foilhelp game their schemes, you can use this information to help you decide which cards to keep & which to discard. Also, players can predict their opponents' next moves by being aware of their tendencies. While some players may favor particular suits or ranks, others may play more erratically. These players may also exhibit predictable patterns.