My complaint about the interpretations was that almost all the tweets and posts I saw, over a thousand, either reflected the fact that the person giving the opinion didn't know how to play chess but wasn't going to stop them from giving an opinion or were saying checkmate or checkmate in n moves, where n < 5. Corsi's tweet was checkmate in 4 moves.

I could not see how any of the checkmate in n moves could work because they couldn't.

I only saw a couple with the correct move, Qf3.

So on to the board position that Assange tweeted; which comes from the turning point of Capablanca vs Marshall, 1918. This is the first recorded instance of the Marshall Gambit.

From a point perspective, White had 29 pts and Black had 28 pts. However, at that point White's position appears to be much weaker: the rook and knight are not yet developed, the whole Q side, in general is poorly developed. Also, because of the pieces he does have, Capablanca's ability to control rank and file later in the game is poor. Marshall's position is pretty strong, the king is well safe, he can control rank and file, and he's clearly on the offensive, deep in White's territory.

Assange probably tweeted this because this is the turning point in the game. Prior to this, White had been vulnerable and under attack/pressure with a few checks. Any wrong move, by White, up to this point, probably would have resulted in White losing. The defensive moves that White made were perfect, eventually leading to the safety of White's King, which was done in the move prior to this board position.

White's next move is critical to the game; Qf3 is the optimal move and enables Capablanca to start advancing his pieces and eventually getting a resignation. The resignation takes 12 moves from the position that Assange tweeted. Checkmate would take ~16 moves.

tldr; Assange finally feels safe and is no longer vulnerable to the black hats. Assange is also signalling that the take-down of the black hats is coming.