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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: 2 advisors and 2 chariots.

楚河漢界士傌兵車士車將傌傌帥

The position

Red attacks with 3 horses and a soldier, and Black's General stands on e8. Black's defenders: 2 advisors and 2 chariots.

  • Mate in 2
  • Horse finish
  • Rating 1799

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

Show the solution

It starts with 傌 a6–c7. Look at what it does: and leaves Black 1 legal reply, none of which help.

The line

  1. Red傌 a6–c7Check. Black must answer.
  2. Black將 e8–f8Black's most stubborn defence.
  3. Red傌 g5–e6Checkmate.

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.

楚河漢界士傌兵車士車將傌傌帥

Why it is mate

A horse delivering mate beside the palace is the shape players call the trough horse, 卧槽马: it checks and covers escape points at the same time, and because a horse cannot be blocked by a piece in its path once it has landed, only capture or flight would help.

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.