Looking at the pattern so far, I've won with paper against rock in round 1, and rock against scissors in round 2. My opponent has used rock and scissors but not paper yet. There's a good chance they might choose paper this round to complete the cycle of options. Additionally, they might anticipate that I would choose paper again since it won in round 1, and try to counter with scissors - but I'll stay one step ahead by choosing scissors myself. This gives me a good chance to either win (if they choose paper) or tie (if they choose scissors).