path to victory; winning scenario
Used in contexts like games, sports, business, or politics to describe a sequence of moves or conditions that lead to winning.
It's hard to find a path to victory in this match.
彼は常に勝ち筋を考えて行動している。
He always acts with a winning scenario in mind.
Compound of 勝ち (winning) and 筋 (line, path, logic). The exact origin is uncertain, but it follows a common pattern of combining a verb stem with 筋 to indicate a logical route or scenario.