KanjiJLPT N1
Chess Piece (Horse)

pony, horse, colt

Mnemonic

A wild horse gallops onto the game board, but freezes the moment a phrase is branded onto its wooden body. Now it's a Chess Piece (Horse)! The phrase tells the horse exactly how it's allowed to move — two squares forward, one to the side. The horse obeys.
Additional thoughts
Picture a living horse shrinking and turning wooden as the phrase appears on it — the phrase is the magic that transforms a horse into a game piece. Shōgi pieces literally have characters written on them, so the phrase-on-horse image is doubly fitting.
Quick recall
A horse branded with a phrase becomes a Chess Piece (Horse).

Details

The keyword for 駒 is chess piece (horse). This kanji originally refers to a young horse or colt, but in Japanese culture it is most commonly associated with the wooden pieces used in shōgi (Japanese chess), which are traditionally shaped to evoke a horse's form. The connection between horses and game pieces reflects the historical importance of cavalry in strategy and warfare, mirroring how chess pieces represent military units. By extension, the kanji can also refer to any piece or pawn used in a strategic context, whether literal or figurative.
On'yomi
Kun'yomi
こま

Used in vocab