3 chess openings


In opening one why would black choose 3... Bd6, it doesn't give him any options he didn't already have (unless he's trying to clear the 8th rank for an early castle.) Secondly, instead of 4...f6 black would do 4...Nh3 and surely things wouldn't crumble so easy.
But if you're opponent doesn't see that then its a killer. :)

well usually black stops check mate by taking out his knight so white cant get his queen out that's why the second one is there

Game 1
3. d3 is passive and not to be recommended. 3...Bd6 is unnecessary and blocks in the other bishop
4. Ng5 (Pointless) f6 (scared of a ghost, there was no threat to Ng5. Nf6 and black is better.)
5. Qh5+ (g6 and white should lose a piece. End of analysis)
Game 2
While the Ng5 is correct in this situation, it is only because of black's lack of experience. With Be7 or Bc5 instead of 4...d6 black can castle in response to Ng5.
Game 3
6...Bxa8 and "black", who is better developed and has two pieces for a rook, is better off.
Conclusion: If you gonna showcase openings, at least have the opponent side play "ok" defense (it would be no different than from showing 1.e4 h6 2. Bc4 h5 3. Qf3 h4 4. Qxf7.) If not, then your just showing some traps that any good player would easily avoid. Focus on chess principles, not trappy openings.