Based on the previous rounds, the opponent has played paper most frequently (rounds 2, 4, 5, and 9), whereas rock and scissors have been used less often. With my previous moves leaning heavily on paper, and given that winning is my only chance to level the score (a win would result in a 2-2 tie which is the best I can do now), I’m aiming to win round 10. To beat paper, the best move is scissors. This is in line with the opponent’s pattern and the frequency analysis, so I choose scissors for round 10.