I've considered entering high sections because they're FIDE rated, but I'd suggest either U1900 or U2100. I did some research, and you don't necessarily a FIDE rating just for playing in FIDE-rated sections. You need to perform at a particular level.
You need to score at least 1 point in a clump of three games, and then in two seperate three-game clumps, get at least .5 points. Byes don't count; you need to play the games.
If you want a point of reference, I played in a 6-round U2100 section a couple days ago (classical time control). I could have entered (and presumably done very well in) the U1800 section. I got 1.5 points in U2100, but I could've lost all 6. Basically, if you feel like winning, go U1900, if you feel like learning, U2100.
Hi, I am a 1766 USCF rated player thinking of playing in the Chicago Open in May. Here is my question: will I gain more experience playing in the u1900, u2100, or u2300 section of this tournament? I think the u2300 is interesting, since its FIDE rated, but I wonder if I will play my best, because it would be easy to lose all hope against such high-rated players.