万圣节开局陷阱 Halloween Gambit
万圣节，熟悉而又陌生的一个节日，标志性元素是面具和南瓜：
万圣节开局陷阱也叫穆勒-舒尔茨（Muller-Schulze）开局陷阱，是从四马开局演变而来：
1. e4 e5
2. Nf3 Nc6
3. Nc3 Nf6
4. Nxe5
弃马踩兵！
这么做的目的是为了突进小兵：
看一个成功的例子：
如何破解，不中陷阱呢？
也很简单，就是退马的时候退到另一边：
全过程演示：
pgn:
[Event "Halloween Gambit: What is the Halloween Gambit?"]
[Site "https://lichess.org/study/bIAJ1BR9/ap7yWDaS"]
[Result "*"]
[UTCDate "2022.10.29"]
[UTCTime "20:11:37"]
[Variant "Standard"]
[ECO "C47"]
[Opening "Four Knights Game: Halloween Gambit"]
[Annotator "https://lichess.org/@/brishan27"]
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 { This is called the Halloween Gambit because it surprises or "spooks" someone when they do Nxe5. } *
[Event "Halloween Gambit: Halloween Gambit Trap"]
[Site "https://lichess.org/study/bIAJ1BR9/JAVYdorq"]
[Result "*"]
[UTCDate "2022.10.29"]
[UTCTime "20:12:40"]
[Variant "Standard"]
[ECO "C47"]
[Opening "Four Knights Game: Halloween Gambit"]
[Annotator "https://lichess.org/@/brishan27"]
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 5. d4 Nc6 6. d5 Ne5 7. f4 { White has a brilliant pawn structure and is trying to gain center control. White is gaining tempo by pushing back black's knight. } 7... Ng6 8. e5 Ng8 9. d6 { White does this to block the Bishop from developing. } 9... cxd6 10. exd6 Qf6 { Black does this to fork both the f and d pawn } { [%csl Gf6,Gf4,Gd6][%cal Gf6f4,Gf6d6] } 11. Nb5 { [%cal Gb5d6,Gb5c7,Gc7e8,Gc7a8] } 11... Kd8 12. Be3! a6?? 13. Bb6+! Ke8 14. Nc7+! Kd8 15. Nxa8+! Ke8 16. Nc7+ Kd8 17. Nd5+!! Ke8 18. Nxf6+ Nxf6 19. Qe2+ Be7 20. f5 Nf4 21. Qxe7# *
[Event "Halloween Gambit: How do you defend against this?"]
[Site "https://lichess.org/study/bIAJ1BR9/nQ0zGCNv"]
[Result "*"]
[UTCDate "2022.10.29"]
[UTCTime "20:18:48"]
[Variant "Standard"]
[ECO "C47"]
[Opening "Four Knights Game: Halloween Gambit"]
[Annotator "https://lichess.org/@/brishan27"]
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 { Just like normal you want to capture the knight because white is giving away a free peice. } 5. d4 Ng6 { Instead of doing Nc6 the better move is to do Ng6. Even though white has a strong pawn structure you want to keep the knight advantage and trade of pieces. } 6. e5 Ng8 7. Bc4 { [%csl Gd7,Ge5,Gf8,Gg8][%cal Gd7d6,Ge5d6,Gg8f6,Gf8d6] } 7... d6 8. exd6 Bxd6 9. O-O Nf6 *
[Event "Halloween Gambit: Happy Halloween!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"]
[Site "https://lichess.org/study/bIAJ1BR9/uLQg9U6Y"]
[Result "*"]
[UTCDate "2022.10.29"]
[UTCTime "20:23:02"]
[Variant "Standard"]
[ECO "C47"]
[Opening "Four Knights Game: Halloween Gambit"]
[Annotator "https://lichess.org/@/brishan27"]
1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 { Happy Halloween!!!!!!!!!!!!!!!!!!! } *