Did Trump know that there would be an attempt to assassinate him at the 6th green?

On 9/13/24 Trump inexplicitly posts what we know commonly as the hashtag symbol by itself on Truth Social.

At the time many believed it also was the symbol for checkmate in the game of chess.

Also, in the game of chess the moving of the king to G6 is usually fatal.

During the 2nd assassination attempt on Trump the potential shooter was discovered just outside of the 6th green (G6), with Trump (king) moving towards it.

Did Trump post the hashtag symbol as a checkmate to covertly acknowledge the coming attempt at his life, and as a sign to know it was coming??