What is 4D / 5D Chess?

"It's the first ever chess variant with spatial, temporal, and parallel dimensions. It's 5D Chess With Multiverse Time Travel! Move pieces back in time to create branching timelines. Send a rook to a parallel dimension. Protect your kings in the present and in the past!"
https://store.steampowered.com/app/1349230/5D_Chess_With_Multiverse_Time_Travel/

"Unlike other variants, this game is the first to use time as an additional dimension, challenging players to think about various attacks and checkmating opportunities across several boards. Players are allowed to move pieces back in time to create new branches in the timeline, which means protecting your king from both the past and the present is critical."
https://www.chess.com/news/view/5d-chess

"All in all, a fine example of 5D chess."
https://eraoflight.com/2020/01/08/trumps-5d-chess-strategy/

"So. How do you think 5D chess, Trump-style, is working out in this Electiongate drama"
https://www.exopermaculture.com/2020/12/10/trumps-5d-chess-with-juan-o-savin-and-charlie-ward/

"Is this all tied in together? Is Trump as 5D Chess Player? Is he 10 moves ahead of “Them” at all times?"
https://www.cosmicnews.org/2020/11/05/trump-as-5d-chess-player-charlie-freak/

"However some Trump supporters told us not to take the black pill and that Trump was just playing 5D chess. What does that mean? 5D chess, or as it was previously known as 4D chess, is described as advanced political strategy Trump uses to manipulate the news media to his advantage."
https://www.theunshackled.net/recourse/was-trump-just-playing-5d-chess-after-all/

"You cannot take on the entire mainstream media and political establishment unless you possess an arsenal that can match or outdo theirs. Looking Glass technology is almost certainly a piece of the puzzle here.

And you know what this means?

It means Trump is playing LITERAL 4D CHESS against the enemies of mankind!!"
https://stillnessinthestorm.com/2019/12/q-anon-is-trump-operating-on-multiple-timelines-is-this-the-true-meaning-of-4d-chess/

"The act of playing a stratagem, moves ahead, in such a multi-layered, brain sparklingly sophisticatedly process, that no one outside of the gamer's own mind even has a biscuit of what is going on until days, weeks or even months later, maybe even never, unless informed in great detail or being a spectacular Autist themselves."
https://www.urbandictionary.com/define.php?term=4D%20chess

"Trump figures in here prominently, as QAnons consider him a 5D chess player whose seeming failures and missteps are all part of a genius strategy."
https://www.counterpunch.org/2020/11/27/siege-the-day-qanon-trumpist-blockages-and-the-logistics-of-spiritual-warfare/

Trump Is Playing 5D Chess With Democrats.And He Hates To Lose
https://www.conservativedailynews.com/2020/11/trump-is-playing-5d-chess-with-democrats-and-he-hates-to-lose/