pony, horse, colt
駒 centers on a young or small horse: a pony or colt. The broader horse sense is a natural extension of the same animal.
駒 combines 馬 (horse) with 句, which likely contributes the sound ク and may relate to the idea of a small or young horse.
The left side 馬 is a horse, and the right side 句 looks like a small enclosure. Picture a young pony kept in a small pen: 駒 is a pony or colt.
For ク, imagine a cool young colt trotting in a field: cool -> ク, and the colt is a small horse.
piece (in shogi, chess, etc.)
pasture used for grazing horses (esp. ponies)
captured piece that can be reused
koma shape; five-sided shape in the form of a koma (shogi game piece)
(game pieces, soldiers, etc.) under one's control
Komazawa University (abbr)
Komazawa University
Japanese robin (Larvivora akahige)
European robin (Erithacus rubecula)
bridge of shamisen
nut (on the head of a shamisen, supporting the second and third strings)
true indigo (Indigofera tinctoria)
piece placed to block opponent's check
major piece; heavy piece
shogi piece
shogi piece
minor piece
yearling; one-year-old colt
anticipating the escape of the king and blocking him in advance with a knight
promoted piece