Chess requires rote memorization (gotta know every book opening 20 moves in), short-term memory/visualization (calculation), and general problem solving (tactic

Chess requires rote memorization (gotta know every book opening 20 moves in), short-term memory/visualization (calculation), and general problem solving (tactics); almost in equal measure. It's absolutely crazy to me how hard it is. I can't play it unless I don't have anything else to think hard about that day. It wipes me out. And sure, you can kinda wing it and not give it 100% of your capacity, but then you just lose. It's brutal. And I suck at it. I can't imagine what these high-level folks go through.