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 is a advisor still on the board, and every legal defence has been tried against this solution. All of them lose.
The position
Red attacks with a chariot and a horse, and Black's General stands on f9. Black's defenders: a advisor.
- Mate in 1
- Chariot finish
- Rating 1340
Red moves first. Find the move that forces mate whatever Black replies, then open the solution below.
Show the solution
俥 g10–f10 is the only move that wins. Look at what it does: it removes 1 escape point from the General.
The line
- Red俥 g10–f10Checkmate.
There is nothing to try. The General cannot move, the checking piece cannot be taken, and nothing can be interposed.
Why it is mate
The chariot arrives on a line the defence cannot close. Chariots are the strongest pieces on the board and most finished attacks end with one, which is why a defender will trade almost anything to swap them off first.
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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