Chess is 99% psychology...A player with the "right mentality" can almost do whatever he/she wants with the game and gonna win. Not matter how good the player are with knowledge about tactics, if the mentality isnt there then the player are gonna lose.
examples of gamese i've played, long time ago.
Game 1;
In this game i followed my intuicion...i let my queen been pinned, so i had to move the queen but then my opponent winning my rook. I calculated this, and i will get compensations with counterplay. Why he didnt played that move? He got psyched out? He didnt see it? Anyway that move was the only move who's not losing. He blundered, then it wasnt interested more so i offered draw (gentlemansagreement). How many players in the world would let them be pinned with purpose? Would Magnus or other players see it and concidered that move that i've played?
Was my move pure tactical move, or it was a psychological move? I mean it's both!
Game 2;
In this game i wanted to challenge myself, about everything - tactical, positional, mentality, sacrificing, strategies...everything - before move 1, against stronger opponent.
This was a experiment and my first attempt to do it...i decided to saq sevelral pieces, including my queen to have a advantage in the game.
My game wasnt brilliant tactically from my point of view, all i wanted were to outplay my opponent by pure psychology.
Unfortunetely she was very greedy...and all i wanted to do were to get some lines...if she played clinical against me i would be destroyed, but anyway it wanst easy for her trough the game. I was very patient with my play.
I just wanted to demonstrate that theory doesnt mean everything...and that's why also Magnus often playing unorthodox and are behind in the opening, just to outplay his opponents in the middlegame/endgame....You can play chess in different ways...but i call this for 99% psychology rather than 99% tactical, by human aspect. Chess are like poker, sometimes you can bluff, and sometimes it works other times it doesnt work. If you only follow theory all the time it ony means that you "playing safe" Thats it.
lichess.org/2FRi1rdu/white?fbclid=IwAR0X1EYgQU7PPZDAteeYkdUuLIkwg14CWGsm96gidF8mWKVaEoiIC34ed-8