M..., very difficult questions, polls suck in congressional elections in Chile (as everywhere haha), but I think that districts where Nueva Mayoria has chances are: 2 (Iquique), 3 (Calama) 4 (Antofagasta), 5 (Copiapo), 6 (Vallenar), 8 (Coquimbo), 9 (Illapel), 11 (Los Andes), 18 (Cerro Navia), 19 (Recoleta-Independencia), 25 (San Joaquín, Macul, La Granja), 27 (San Ramon, La Cisterna, El Bosque), 28 (San Miguel, Pedro Aguirre Cerda, Lo Espejo), 32 (Rancagua), 33 (Rengo), 34 (San Fernando), 36 (Curico), 38 (Constitución), 42 (San Carlos), 44 (Concepción), 45 (Coronel), 46 (Lota), 60 (Punta Arenas). Alianza is probably going to keep the two seats in district 23 (by far the richest one in the country)
Chances go from very likely (district 8 ) to very very unlikely (district 19) and, in some cases, maybe it could have some third party candidate with good perfomances (districts 4, 21, 30, 60, etc.)
You can follow the results in
www.elecciones.gov.cl (the first ones should be ready around 1900, Chilean time)