Based on the opponent's previous moves, I notice they've chosen rock most frequently (4 out of 7 rounds). There's also a potential pattern emerging where after playing rock in round 7, they might choose scissors in round 8. Rock would be the optimal counter to scissors. Additionally, when I've chosen rock against this opponent's scissors (round 2), I won. With the scores tied at 3-3, making a strategic choice based on the opponent's tendencies gives me the best chance to take the lead.