Red moves and mates in 1
Mate in 1, proven against every defence.
Red is to move and forces mate in 1. Black is not helpless: there are 2 elephants and a soldier still on the board, and every legal defence has been tried against this solution. All of them lose.
The position
Red attacks with a horse and 2 cannons, and Black's General stands on f8. Black's defenders: 2 elephants and a soldier.
- Mate in 1
- Cannon finish
- Rating 1112
Red moves first. Find the move that forces mate whatever Black replies, then open the solution below.
Show the solution
炮 i5–f5 is the only move that wins. Look at what it does: it removes 1 escape point from the General.
The line
- Red炮 i5–f5Checkmate.
There is nothing to try. The General cannot move, the checking piece cannot be taken, and nothing can be interposed.
Why it is mate
Two cannons on one line, the front one screening the one behind it. That is 重炮, stacked cannons, and it cannot be blocked: any piece that steps in simply becomes another screen.
Read about this patternHow this puzzle was checked
Nothing here is an engine opinion. The position was solved by trying every legal defence to the full mate distance, so the claim that Red mates in 1 is a proof rather than an evaluation, and the first move shown is the only one that works. The defence in the line above is Black’s most stubborn try, not a convenient one.
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