Sharing the Autumn Equally

Sharing the Autumn Equally楚河 漢界帥卒卒車相卒卒兵兵俥炮砲炮象兵兵砲將

"Sharing the Autumn Equally" is a Xiangqi (Chinese Chess) puzzle from the collection Xinwu Endgame Collection. Red moves first and wins in 25 moves; the key first move is C3=5. 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, a Chariot, 2 Cannons, 4 Soldiers. Black has a General, a Elephant, a Chariot, 2 Cannons, 4 Soldiers.

Solution move by move

  1. 1. Red C3=5 (check, threatens mate next move, the General has no escape square)
    Why it works
    • 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 E5+7
    1楚河 漢界帥卒卒車相卒卒兵兵俥象炮砲炮兵兵砲將
    1. Black E5+7
  2. 2. Red C5=1
    Why it works–
    What to watch out for
    • Not forcing: the defender has 33 replies, so compare each one before playing it.
    2. Black E7-5
    2楚河 漢界帥卒卒車相卒卒兵兵俥炮砲炮象兵兵砲將
    2. Black E7-5
  3. 3. Red C1=5 (check, threatens mate next move, the General has no escape square)
    Why it works
    • 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.
    3. Black E5+7
    3楚河 漢界帥卒卒車相卒卒兵兵俥象炮砲炮兵兵砲將
    3. Black E5+7
  4. 4. Red E5-3
    Why it works–
    What to watch out for
    • Not forcing: the defender has 36 replies, so compare each one before playing it.
    4. Black R9=6 (check, threatens mate next move, the only legal reply, the General has no escape square)
    4楚河 漢界帥相卒卒車卒卒兵兵俥象炮砲炮兵兵砲將
    4. Black R9=6
  5. 5. Red R4-4 (captures the Chariot)
    Why it works
    • Wins material: takes the Chariot.
    What to watch out for
    • Not forcing: the defender has 31 replies, so compare each one before playing it.
    • The Chariot stands where it can be captured.
    5. Black C9+5 (check, threatens mate next move, the only legal reply, the General has no escape square)
    5楚河 漢界帥相砲卒卒俥卒卒兵兵象炮炮兵兵砲將
    5. Black C9+5
  6. 6. Red E3+1
    Why it works–
    What to watch out for
    • Not forcing: the defender has 25 replies, so compare each one before playing it.
    • The Elephant stands where it can be captured.
    6. Black P5=6 (captures the Chariot, check, threatens mate next move)
    6楚河 漢界帥砲卒卒卒相卒兵兵象炮炮兵兵砲將
    6. Black P5=6
  7. 7. Red K4+1 (captures the Soldier)
    Why it works
    • Wins material: takes the Soldier.
    What to watch out for
    • Not forcing: the defender has 30 replies, so compare each one before playing it.
    7. Black C2+8 (check)
    7楚河 漢界砲砲卒帥卒相卒兵兵象炮炮兵兵將
    7. Black C2+8
  8. 8. Red K4+1
    Why it works–
    What to watch out for
    • Not forcing: the defender has 29 replies, so compare each one before playing it.
    8. Black P8=7 (check, the only legal reply)
    8楚河 漢界砲砲卒帥卒相卒兵兵象炮炮兵兵將
    8. Black P8=7
  9. 9. Red K4=5
    Why it works–
    What to watch out for
    • Not forcing: the defender has 30 replies, so compare each one before playing it.
    9. Black C9=8 (threatens mate next move)
    9楚河 漢界砲砲卒帥卒相卒兵兵象炮炮兵兵將
    9. Black C9=8
  10. 10. Red C2-3 (sacrifices the Cannon)
    Why it works–
    What to watch out for
    • Gives up the Cannon; the follow-up must be exact or the sacrifice is wasted.
    • Not forcing: the defender has 30 replies, so compare each one before playing it.
    10. Black P7=8 (captures the Cannon)
    10楚河 漢界砲砲卒帥卒相卒兵兵象炮兵兵將
    10. Black P7=8
  11. 11. Red C5=9
    Why it works–
    What to watch out for
    • Not forcing: the defender has 31 replies, so compare each one before playing it.
    11. Black P8=7 (threatens mate next move)
    11楚河 漢界砲砲卒帥卒相卒兵兵象炮兵兵將
    11. Black P8=7
  12. 12. Red K5=6
    Why it works–
    What to watch out for
    • Not forcing: the defender has 39 replies, so compare each one before playing it.
    12. Black P4=3 (threatens mate next move)
    12楚河 漢界砲砲卒帥卒相卒兵兵象炮兵兵將
    12. Black P4=3
  13. 13. Red E1+3
    Why it works–
    What to watch out for
    • Not forcing: the defender has 37 replies, so compare each one before playing it.
    13. Black C8-2 (check, the only legal reply, the General has no escape square)
    13楚河 漢界砲卒帥卒砲卒兵相兵象炮兵兵將
    13. Black C8-2
  14. 14. Red E3-5
    Why it works–
    What to watch out for
    • Not forcing: the defender has 30 replies, so compare each one before playing it.
    • The Elephant stands where it can be captured.
    14. Black C8-7
    14楚河 漢界砲卒帥相卒卒兵兵象炮兵兵將砲
    14. Black C8-7
  15. 15. Red C9+2
    Why it works–
    What to watch out for
    • Not forcing: the defender has 32 replies, so compare each one before playing it.
    15. Black C2-7
    15楚河 漢界卒帥相卒卒兵兵象炮砲兵兵將砲
    15. Black C2-7
  16. 16. Red +P=8 (captures the Cannon)
    Why it works
    • Wins material: takes the Cannon.
    What to watch out for
    • Not forcing: the defender has 23 replies, so compare each one before playing it.
    16. Black P1=2
    16楚河 漢界卒帥相卒卒兵兵象炮兵兵將砲
    16. Black P1=2
  17. 17. Red P6=5 (check, the only legal reply)
    Why it works
    • Forcing: the opponent has only one reply, so the line cannot be avoided.
    What to watch out forNo real drawback in this position.
    17. Black K5=6
    17楚河 漢界卒帥相卒卒兵兵象炮兵兵將砲
    17. Black K5=6
  18. 18. Red P8+1 (sacrifices the Soldier, threatens mate next move)
    Why it works
    • Creates an immediate mating threat that must be answered.
    What to watch out for
    • Gives up the Soldier; the follow-up must be exact or the sacrifice is wasted.
    • Not forcing: the defender has 23 replies, so compare each one before playing it.
    18. Black C8=2 (captures the Soldier)
    18楚河 漢界卒帥相卒卒兵兵象炮兵砲將
    18. Black C8=2
  19. 19. Red C9=7
    Why it works–
    What to watch out for
    • Not forcing: the defender has 20 replies, so compare each one before playing it.
    19. Black C2=3
    19楚河 漢界卒帥相卒卒兵兵象炮兵砲將
    19. Black C2=3
  20. 20. Red E5-3
    Why it works–
    What to watch out for
    • Not forcing: the defender has 16 replies, so compare each one before playing it.
    20. Black E7-5
    20楚河 漢界相卒帥卒卒兵兵象炮兵砲將
    20. Black E7-5
  21. 21. Red P7+1 (sacrifices the Soldier)
    Why it works–
    What to watch out for
    • Gives up the Soldier; the follow-up must be exact or the sacrifice is wasted.
    • Not forcing: the defender has 17 replies, so compare each one before playing it.
    21. Black C3+3 (captures the Soldier)
    21楚河 漢界相卒帥卒卒兵砲象炮兵將
    21. Black C3+3
  22. 22. Red C7-7 (captures the Soldier)
    Why it works
    • Wins material: takes the Soldier.
    What to watch out for
    • Not forcing: the defender has 25 replies, so compare each one before playing it.
    22. Black P2=3
    22楚河 漢界相炮帥卒卒兵砲象兵將
    22. Black P2=3
  23. 23. Red C7+5 (captures the Cannon)
    Why it works
    • Wins material: takes the Cannon.
    What to watch out for
    • Not forcing: the defender has 10 replies, so compare each one before playing it.
    23. Black P3=4 (check)
    23楚河 漢界相帥卒卒兵炮象兵將
    23. Black P3=4
  24. 24. Red K6-1
    Why it works–
    What to watch out for
    • Not forcing: the defender has 10 replies, so compare each one before playing it.
    24. Black P4=5 (captures the Soldier)
    24楚河 漢界相帥卒卒炮象兵將
    24. Black P4=5
  25. 25. Red C7-4
    Why it works–
    What to watch out for
    • Not forcing: the defender has 10 replies, so compare each one before playing it.
    25楚河 漢界相帥炮卒卒象兵將
    25. Red C7-4

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 漢界相帥炮卒卒象兵將

The record ends here.

Questions about this puzzle

Who moves first in "Sharing the Autumn Equally"?

Red moves first, as in every puzzle of Xinwu Endgame Collection.

How many moves does the solution take?

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

What is the key move?

The first move C3=5 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.

Nearby puzzles

More from Xinwu Endgame Collection →

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