Position and objective
Red material: Double Chariot. Black defenders: Advisor.
Mate the black general within the move limit. Red moves first and the AI answers for Black, with every move validated as it is played.
The black general starts on f8. Trace Red's i9-i8 move on the diagram before checking Black's reply.
How the mate works
Verified line: Red i9-i8 (車一退一), Black f8-f9 (將6退1), then Red d3-d9 (車六进六) mates. This is one legal continuation of the validated solution.
The shortest mate takes two moves. The complete move list is on this page — try to find it yourself first.
The first move is the key to the forced mate. Black may have other legal replies; the line below shows one verified continuation.
Key move and common mistakes
The right chariot retreats from i9 to i8. The general retreats from f8 to f9 in the recorded reply; the other chariot advances from d3 to d9 for mate. A retreat is the key opening move even though the final attack advances.
Follow the general’s retreat before inspecting every intermediate point on the d-file. Do not assume the first move must advance.
Full move list
Moves alternate Red and Black, exactly as published in the solution.
- 1. i9-i8 f8-f9 （車一退一 將6退1）
- 2. d3-d9 （車六进六）
Difficulty and help
Use Hint when you are stuck, or Undo to take a move back.
A wrong move does not end the game — restart the same position and try again.