Find the mate in 1
Mate in 1, proven against every defence.
A one move finish, Red to play. Black holds nothing but the General, which is enough to survive most attacks and not this one.
The position
Red attacks with 2 cannons, and Black's General stands on d9. Black's defenders: nothing but the General.
- Mate in 1
- Cannon finish
- Rating 1309
Red moves first. Find the move that forces mate whatever Black replies, then open the solution below.
Show the solution
The move is 炮 h4–d4. Look at what it does: it removes 2 escape points from the General.
The line
- Red炮 h4–d4Checkmate.
Mate is immediate: no flight square, no capture and no block.
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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New to mating patterns? The glossary names the ones that come up again and again, the piece guides explain what each piece can do, and the rules page covers everything from the start.