professional shogi player; professional go player
Refers to a person who makes a living playing shogi or go at a professional level. The context usually makes it clear which game is meant.
He became a professional shogi/go player at a young age.
After years of hard work, he became a professional shogi player.
Matches between professional shogi/go players often last for many hours.
She competes in tournaments at home and abroad as a professional player.
囲碁 is the game of go itself, while 棋士 refers to the professional person who plays it.
棋士 means any professional go or shogi player, whereas 棋聖 is a specific prestigious title only the tournament winner holds.
female professional shogi player; female professional go player
棋 (go/shogi) + 士 (person of a certain profession). The term originally referred to professional players of board games like go and shogi.