Quick answer: Tsume shogi is forced-checkmate training: the attacker must check on every move, while the defender chooses the most resistant legal reply.
Best for: Beginners who know check and mate and want a repeatable way to calculate forcing lines.
In This Lesson
- Understand why tsume problems use odd move counts.
- Search checks, captures, escapes, blocks, and defensive drops in order.
- Solve three verified mate-in-one positions with Japanese kanji pieces.
- Avoid false solutions, including illegal pawn-drop mate.
Tsume shogi trains forced-checkmate calculation. The attacker checks on every move; the defender chooses the reply that resists mate most effectively. A well-composed problem has an intended solution that works against every legal defense.
How Move Counts Work
A “mate in 1” ends with the attacker’s first move. A “mate in 3” counts attacker, defender, attacker. Standard problem lengths are therefore odd because the attacker moves first and delivers the final mate.
Correct Calculation vs a False Solution
| Correct habit | Typical beginner error |
|---|---|
| List every legal defense after the check. | Stop as soon as one attractive mating move is found. |
| Confirm the checking piece is protected when the King could capture it. | Assume a nearby dropped piece cannot be captured. |
| Check interpositions and defensive drops on sliding lines. | Test only King moves. |
| Reject an immediate mate delivered by a Pawn drop. | Forget the uchifuzume restriction during a puzzle. |
Reliable Solving Order
- List every legal check, including drops and promotions.
- For each check, list King moves, captures, interpositions, and defensive drops.
- Assume the defender chooses the line that delays mate or defeats the idea.
- Verify that every attacker move is check and the final position has no legal defense.
- Reject an illegal Pawn-drop mate; uchifuzume still applies in a tsume problem.
Three Verified Mate-in-One Problems
What to Record After Solving
Do not stop at the answer. Name the mating pattern, the square that removes the final escape, and the defender’s most tempting reply. Re-solving a small accurate set is more useful than rushing through many positions without verification.
Transfer the Skill to Games
In a real game, first search for immediate mate. If none exists, compare forcing checks, mate threats, and the opponent’s counter-mate. Tsume practice strengthens calculation, but real-game defense and move-order choices remain part of the position.
For the formal problem conventions and a continuing set of exercises, consult the Japan Shogi Association tsume shogi page.
