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 d9. Trace Red's f5-d5 move on the diagram before checking Black's reply.
How the mate works
Verified line: Red f5-d5 (車四平六), Black e8-d7 (士5进4), then Red d5-d7 (車六进二) 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 chariot shifts from f5 to d5. The black advisor advances from e8 to d7 in the recorded reply, and the same chariot advances from d5 to d7 for mate. The defender’s move establishes the destination for the final capture.
Complete the advisor reply before moving the chariot again. Check the updated d-file rather than omitting the defender’s turn.
Full move list
Moves alternate Red and Black, exactly as published in the solution.
- 1. f5-d5 e8-d7 （車四平六 士5进4）
- 2. d5-d7 （車六进二）
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.