Formal or literary term for the game of go. Rare in everyday speech; used in classical or poetic contexts.
See also: 囲碁
爛柯 is known as an elegant name for the game of go.
losing track of time while engrossed in go; losing track of time while engrossed in an activity
Derived from a Chinese legend about a man who watched a go game so long that his axe handle rotted. Used figuratively for deep absorption in any activity, but strongly associated with go.
He is so absorbed in his research that he loses all track of time.