how dangerous are these kind of f2 f7 opening bishop / knight sacrifices in rapid ?

its not really a sacrifice because i trapped his bishop (update , its not , i thought it was ), but i think it doesent matter for this question

in this case i difused it sucsesfully

Often sacrifices of that style are just cheap opening traps that fail if the opponent knows what they're doing. It depends greatly on the position, though; sometimes they can be quite dangerous. In this particular case, however, it was honestly a very stupid move. The bishop wasn't trapped, it could simply have moved to d5.

@Quasar3C273 said ^

Often sacrifices of that style are just cheap opening traps that fail if the opponent knows what they're doing. It depends greatly on the position, though; sometimes they can be quite dangerous. In this particular case, however, it was honestly a very stupid move. The bishop wasn't trapped, it could simply have moved to d5.

is it also the case with the alien gambit ? ( in rapid )

@Quasar3C273 said ^

Often sacrifices of that style are just cheap opening traps that fail if the opponent knows what they're doing. It depends greatly on the position, though; sometimes they can be quite dangerous. In this particular case, however, it was honestly a very stupid move. The bishop wasn't trapped, it could simply have moved to d5.

do you have an example of an more dangerous one ?

@najdorfplayer48

The Alien Gambit is refutable, but definitely scary. It's certainly one of those I would least like to face in a fast-paced game. In rapid, still dangerous, but not as much since you have time to think your way out (depends a lot on rating obviously). In my opinion it's certainly one of the scarier ones.

"do you have an example of an more dangerous one ?"

• The Cochrane Gambit
  
  https://lichess.org/AUgYzo8L#6

@tpr said ^

"do you have an example of an more dangerous one ?"

• The Cochrane Gambit
  
  https://lichess.org/AUgYzo8L#6

why doesent he do this ?

castling queenside with playing this gambit must be fun