Puzzle x3902 · rating 1635

Red moves and mates in 2

Mate in 2, proven against every defence.

Red is to move and forces mate in 2. Black is not helpless: there is a cannon still on the board, and every legal defence has been tried against this solution. All of them lose.

The position

Red attacks with a cannon, a soldier and 2 horses, and Black's General stands on f10. Black's defenders: a cannon.

Mate in 2
Soldier finish
Rating 1635

Red moves first. Find the move that forces mate whatever Black replies, then open the solution below.

Show the solution

傌 e6–d8 is the only move that wins. Look at what it does: it removes 2 escape points from the General, and leaves Black 13 legal replies, none of which help.

The line

Red傌 e6–d8Quiet, and there is no answer to the threat.
Black砲 a6–a5Black's most stubborn defence.
Red兵 h10–g10Checkmate.

Every one of Black's 13 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

A soldier gives the mate, which only happens once it has crossed the river and can step sideways. It is the cheapest piece on the board finishing a game, and it is a reminder that a crossed soldier is an attacker rather than a wall.

Read about this pattern

How 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.

Solve puzzles on a real board More mates in 2 Enter the board

Next puzzles

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.