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棋逢对手

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Red to move. There is exactly one winning first move here, and it mates in 2 against anything Black tries. Black's remaining force: a soldier.

楚河漢界俥炮兵將卒帥

The position

Red attacks with a chariot, a cannon and a soldier, and Black's General stands on f8. Black's defenders: a soldier.

  • Mate in 2
  • Cannon finish
  • Rating 1564

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

Show the solution

It starts with 帥 d1–e1. Look at what it does: it removes 1 escape point from the General, and leaves Black 1 legal reply, none of which help.

The line

  1. Red帥 d1–e1Quiet, and there is no answer to the threat.
  2. Black卒 i7–i6Black's most stubborn defence.
  3. Red炮 f9–e9Checkmate.

Every one of Black's 1 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.

楚河漢界俥炮兵將卒帥

Why it is mate

The mating piece arrives on a square the defence cannot cover.

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.

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.