noun
Go problem; tsumego
A composed Go problem, typically a life-and-death or endgame puzzle used for practice.
毎朝、詰碁を解いてから仕事に行く。
Every morning, I solve a Go problem before going to work.
Shogi counterpart: composed checkmate problems. 詰碁 is specifically for Go.
Compound of 詰め (tsume, 'checkmate' or 'pinning down') and 碁 (go, the board game). The term is analogous to 詰将棋 (tsumeshōgi) in shogi.