Since I'm already leading 4-2, I only need to avoid losing this round to win the overall game. Based on the opponent's pattern, they've recently chosen rock after I played scissors (in round 9), which suggests they might anticipate me playing rock this round and choose paper to counter. There's also a possibility they'll play scissors expecting me to choose paper. Given these considerations, scissors is a strategic choice - it would beat paper if the opponent tries to counter my previous scissors play with paper, and would tie with scissors if they try to predict my move that way. The opponent needs to win this round to tie the overall game, so they're more likely to make a bold move rather than playing conservatively.