Hello, All of you know opening traps, here is an example of one I met a few times in the exchange Ruy Lopez
After the move number 10
yup, great traps!
The fishing pole trap (1st example) is particularly scary if you're scared of tension. in the Ruy Lopez black's Bg4 isn't much of a big deal if white doesn't play d4. White can slow play c3, d3, Nbd2-f1-e3 or g3, and hold off on h3.
The early Bg4 is a classic mistake. These cases are why beginners are advised to develop knights before bishops! A simple move order fix would solve this, as pinning the knight isn't urgent, but developing and protecting the center is! It's also important to acknowledge an adjacent mistake which is the same Bg4 pin but before developing the Nf6 knight. In a lot of cases, White can win a pawn and weaken black's king with Bxf7 and Ne4+, followed by picking up Black's light squared bishop.
hope this helps!
Actually Bg4 in the Ruy is theory and a good alternative for other moves such as f6, Qd6
Yes, Bg4 in the Ruy Lopez in general works to act against white playing d4 easily. But White often does just fine by ignoring the pin and slow playing the position, or can get in d4 in the mainline for example, by using a tempo for h3.
In the exhange variation (above) Bg4 and h3 is actually most common, but then White should continue to slow play with Nd2 d3 etc. Black doesn't necessarily want to take the Knight for free cause his bishop pair is his compensation for the worse pawn structure. So he is simply using the pressure to slow White down.
hope this helps!
The Bishop is poisoned, only after some preperatory moves can it be taken after which the position remains equal
Here is an example how not to play with white against the Italian two knights defence, although I made one blunder with Re8
a common trap in the London system
lichess.org/0lSWrEdr#11 A trap in the QGA, used to play this a lot when I was a Queens Gambit player. The only way to stop losing the rook is to give up the knight and then after Qxc6 Bd7 , the rook is defended, but ur down a piece, though my opponent in this game didn't play this but just gave the rook. And after that I shown why I was a 1100 at the time because of a queen blunder, but then later got back the queen back and won the game :)