Find the mate in 2
Mate in 2, proven against every defence.
A two move finish, Red to play. Black holds a horse, which is enough to survive most attacks and not this one.
The position
Red attacks with a cannon, a chariot and a horse, and Black's General stands on f9. Black's defenders: a horse.
- Mate in 2
- Chariot finish
- Rating 1768
Red moves first. Find the move that forces mate whatever Black replies, then open the solution below.
Show the solution
The move is 俥 c4×c7. Look at what it does: it takes a defender off the board on the way, and leaves Black 2 legal replies, none of which help.
The line
- Red俥 c4×c7Quiet, and there is no answer to the threat.
- Black將 f9–f8Black's most stubborn defence.
- Red俥 c7–c9Checkmate.
Every one of Black's 2 answers was played out to the end. The line below follows the most stubborn of them, the one that lasts longest and costs Red the most.
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 2 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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