Oenophiles searching for a wine list that both delights and challenges need look no further than the fringes of Boston Common. No. 9 Park wine director Cat Silirie has organized a list that's a worldly tour of tried-and-true chianti, sauvignon blanc, and chardonnay, and paired them with such never-before-heard-of vineyards and varietals as Josco Gravner's ribolla gialla from the northeast corner of Italy and the No. 9 Park private label refosco, a grape from Trentino, Italy, that's grown and bottled at Santa Barbara, California's Au Bon Climat winery. The result: a list that complements chef Barbara Lynch's sophisticated cuisine and is easily organized by grape and flavor (lighter for aperitif to full-bodied, barrel-fermented big boys). Silirie wants diners to be comfortable with wine, and that's exactly what her stellar palate and fastidious organization achieve.