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Tsume shogi (詰将棋 or 詰め将棋, tsume shōgi) or tsume (詰め) is the Japanese term for a shogi miniature problem in which the goal is to checkmate the opponent's king. Tsume problems usually present a situation that might occur in a shogi game (although unrealistic artistic tsume shogi exists), and the solver must find out how to achieve checkmate. It is similar to a mate-in-n chess problem.
The term tsumi (詰み) means the state of checkmate itself. The verb form is tsumu (詰む) "to checkmate". (The related term tsumero 詰めろ refers to the slightly different concept of "threatmate". See: Hisshi.)
Tsume shogi problems are strictly forced mate problems with constant checks. They assume that the player is in brinkmate and that they will lose unless they can force a mate sequence with a check on every move. The situation simulates real shogi games in which the endgame is essentially a mutual mating race.
Note that the concept of stalemate as in western chess does not exist in shogi as it essentially does not occur.[1][2]
(Although not tsume shogi problems, another type of related shogi problem is a hisshi 'brinkmate' problem, a checkmate problem of which the goal is to brinkmate and eventually checkmate the opponent which allows the player to do one or more non-checking moves. Another type is the tsugi no itte 'best next move' problem, which is non-checkmate problem of which the goal is to find the next best move/s that will give you an advantage, which may be encompass the endgame close to checkmate but may also include opening and middlegame strategies.)
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