战术举例8：湖北陈淑兰 loses to 北京谢思明

Pieces on the board

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

Solution move by move

1. 1. Black C8+1

   Why it works–

   What to watch out for

   • Not forcing: the defender has 36 replies, so compare each one before playing it.
   • The Cannon stands where it can be captured.

   1. Red P3+1 (captures the Soldier)

2. 2. Black C8=7 (sacrifices the Cannon, threatens mate next move)

   Why it works

   • Creates an immediate mating threat that must be answered.

   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 41 replies, so compare each one before playing it.

   2. Red R7=3 (captures the Cannon)

3. 3. Black R8+3 (captures the Chariot)

   Why it works

   • Wins material: takes the Chariot.

   What to watch out for

   • Not forcing: the defender has 34 replies, so compare each one before playing it.

   3. Red P3=4 (captures the Horse)

4. 4. Black R2+7

   Why it works–

   What to watch out for

   • Not forcing: the defender has 37 replies, so compare each one before playing it.

Variations and alternative defences

What if Red 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.

• 1. Red P3+1
  • If Red plays K5=6 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=7 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=8 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=9 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C-1 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays H9-7 instead: no immediate mate; the attack continues. Try it on the board
• 2. Red R7=3
  • If Red plays K5=6 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=7 instead: Black mates immediately with C7+4. Try it on the board
  • If Red plays -C=8 instead: Black mates immediately with C7+4. Try it on the board
  • If Red plays -C=9 instead: Black mates immediately with C7+4. Try it on the board
  • If Red plays -C-1 instead: Black mates immediately with C7+4. Try it on the board
  • If Red plays H9-7 instead: Black mates immediately with C7+4. Try it on the board
• 3. Red P3=4
  • If Red plays K5=6 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=7 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=8 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C=9 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays -C-1 instead: no immediate mate; the attack continues. Try it on the board
  • If Red plays H9-7 instead: no immediate mate; the attack continues. Try it on the board

Final position

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