The Origin of an Idea- Vidmar or Kasparov? (Perhaps Someone Else!)

My dear friend Simaginfan has published two blogs about Milan Vidmar (1885-1962); the first one is from 2017, featuring some of Vidmar's games:

https://www.chess.com/blog/simaginfan/milan-vidmar-some-games-and-writings

and the second one, from a few days ago, features some of Vidmar's excellent annotations to some of his own games:

https://www.chess.com/blog/simaginfan/milan-vidmar-some-of-the-greatest-game-annotations-that-you-will-ever-see

So that sparked some interest in Vidmar. Today, on a whim, I started looking at some of Vidmar's games, and one win with White against Rubinstein in 1918 caught my eye....because I recognized an idea which Kasparov claimed as a novelty in 1983! (For his Quarter-Final Candidates' Match against Beliavsky).

The idea is Bf5 for White against a Queens Gambit position where White has played cxd5. This position can also arise from a Queen's Indian Defense. it is a common idea, when Black has played ....b6 and ....Bb7, for White to play cxd5. This blocks the diagonal for Black's bishop on b7, but also it accomplishes something else. You see, when Black replies exd5, his f5 square is left unprotected. And this is something that Vidmar exploited in his game against Rubinstein in 1918, and Kasparov followed suit in 1983!

Here is Vidmar's game from 1918:

and here is Kasparov's game in 1983:

The move Bf5 puts pressure on the Black position and prevents Black from achieving harmonious development. But when Kasparov claims it was a "novelty", I have no idea if his statement is accurate or not. I declare myself ignorant as to which is the first game that features this idea. I leave this to Simaginfan and others who know more about chess history!

greetings to all, and wishes of good health, safety and happiness!