There are as many GERHARD RICHTERs as there are people who care about contemporary art; no matter how illuminating a particular presentation of his work, it will inevitably be partial. The honor of organizing the German painter's first full-scale American retrospective, which travels this month to the Art Institute of Chicago, fell to Museum of Modern Art curator Robert Storr. We called on three critics and three artists to tell us what, in their estimation, was mastered and what missed.
