Meaning of 三味線駒 in Japanese

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Definition of 三味線駒

こま(koma) 【駒】

(n) piece (in shogi, chess, etc.)
僕はボードの上の駒を一つ前に進めた。
I moved a chess piece on the board one forward.
horse; foal
bridge (of a violin, etc.)

しゃみせん(shamisen) · さみせん(samisen) 【三味線】

(n) three-stringed Japanese guitar; shamisen
彼女は三味線による新しいジャズの演奏法を始めた。
She originated a new way of playing jazz on the shamisen.