No. 3: Ram Caught in the Fence

No. 3: Ram Caught in the Fence楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬俥兵象兵士兵車車象砲將士兵

"No. 3: Ram Caught in the Fence" is a Xiangqi (Chinese Chess) puzzle from the collection Elegant Pastimes (Shiqing Yaqu, 1570). Red moves first and wins in 9 moves; the key first move is P3=4. Below you will find the full solution, what each move achieves, where it could go wrong, and the alternative defences.

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Pieces on the board

Red has a General, a Elephant, 2 Chariots, a Horse, 2 Cannons, 4 Soldiers. Black has a General, 2 Advisors, 2 Elephants, 2 Chariots, 2 Horses, 2 Cannons, 3 Soldiers.

Solution move by move

  1. 1. Red P3=4 (captures the Advisor, check, sacrifices the Soldier, threatens mate next move, the only legal reply, the General has no escape square)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Wins material: takes the Advisor.
    • Creates an immediate mating threat that must be answered.
    • Takes away the General's escape squares.
    What to watch out forNo real drawback in this position.
    1. Black C4=6 (captures the Soldier, threatens mate next move)
    1楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬俥兵象兵士兵車車象將砲
    1. Black C4=6
  2. 2. Red P6=5 (captures the Advisor, check, threatens mate next move, the only legal reply)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Wins material: takes the Advisor.
    • Creates an immediate mating threat that must be answered.
    What to watch out forNo real drawback in this position.
    2. Black K5=4 (threatens mate next move)
    2楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬俥兵象兵兵車車象將砲
    2. Black K5=4
  3. 3. Red P5+1 (check, threatens mate next move, the only legal reply)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Creates an immediate mating threat that must be answered.
    What to watch out forNo real drawback in this position.
    3. Black K4+1 (threatens mate next move)
    3楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬俥兵象將兵車車象兵砲
    3. Black K4+1
  4. 4. Red +R=6 (check, sacrifices the Chariot, threatens mate next move, the only legal reply, the General has no escape square)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Creates an immediate mating threat that must be answered.
    • Takes away the General's escape squares.
    What to watch out for
    • Gives up the Chariot; the follow-up must be exact or the sacrifice is wasted.
    4. Black H2-4 (captures the Chariot, threatens mate next move)
    4楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬兵象將兵車車象兵砲
    4. Black H2-4
  5. 5. Red H9+7 (check, threatens mate next move, the only legal reply)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Creates an immediate mating threat that must be answered.
    What to watch out forNo real drawback in this position.
    5. Black K4+1 (threatens mate next move)
    5楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬兵將象兵車車象兵砲
    5. Black K4+1
  6. 6. Red P8=7 (check, threatens mate next move, the only legal reply)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Creates an immediate mating threat that must be answered.
    What to watch out forNo real drawback in this position.
    6. Black K4-1 (threatens mate next move)
    6楚河 漢界砲帥卒卒炮炮俥相卒馬傌馬兵象將兵車車象兵砲
    6. Black K4-1
  7. 7. Red R8+4 (check, sacrifices the Chariot, the General has no escape square)
    Why it works
    • Takes away the General's escape squares.
    What to watch out for
    • Gives up the Chariot; the follow-up must be exact or the sacrifice is wasted.
    7. Black R2+1 (captures the Chariot, threatens mate next move)
    7楚河 漢界砲帥卒卒炮炮相卒馬傌馬兵象車將兵車象兵砲
    7. Black R2+1
  8. 8. Red P7=8 (check, threatens mate next move, the only legal reply)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    • Creates an immediate mating threat that must be answered.
    What to watch out forNo real drawback in this position.
    8. Black K4+1 (threatens mate next move)
    8楚河 漢界砲帥卒卒炮炮相卒馬傌馬兵將象車兵車象兵砲
    8. Black K4+1
  9. 9. Red C9+3 (checkmate)
    Why it works
    • Ends the game: no legal reply remains.
    What to watch out forNo real drawback in this position.
    9楚河 漢界砲帥卒卒炮相卒馬傌馬炮兵將象車兵車象兵砲
    9. Red C9+3

Variations and alternative defences

What if Black defends differently? The alternatives below were checked with the rules engine; lines marked with a mating move lose at once, the others are worth trying on the analysis board.

Final position

Final position楚河 漢界砲帥卒卒炮相卒馬傌馬炮兵將象車兵車象兵砲

Red wins after 9 moves. The General has no legal move.

Questions about this puzzle

Who moves first in "No. 3: Ram Caught in the Fence"?

Red moves first, as in every puzzle of Elegant Pastimes (Shiqing Yaqu, 1570).

How many moves does the solution take?

9 moves. The main line is shown above; alternative defences are covered in the variations section.

What is the key move?

The first move P3=4 starts the combination. Everything that follows depends on it.

Can I play this position myself?

Yes. Open it on ChessZing, where the board checks your moves and shows the solution if you get stuck.

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