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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: 3 advisors and 2 cannons.

楚河漢界將士士俥炮士傌俥砲砲傌炮帥

The position

Red attacks with 2 chariots, 2 cannons and 2 horses, and Black's General stands on e10. Black's defenders: 3 advisors and 2 cannons.

  • Mate in 2
  • Chariot finish
  • Rating 1573

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

Show the solution

It starts with 俥 g9–g10. Look at what it does: it removes 2 escape points from the General, and leaves Black 1 legal reply, none of which help.

The line

  1. Red俥 g9–g10Check. Black must answer.
  2. Black士 e9–f10Black's most stubborn defence.
  3. Red俥 g10×f10Checkmate.

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.

楚河漢界將俥士炮士傌俥砲砲傌炮帥

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 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.

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.