A piano series concert, Beethoven 250, was presented at the Texas Crown Performance Hall Tuesday evening to standing ovations from the small, but appreciative, audience. Pianist David Palmer and violinist Evgeny Zvonnikov performed Beethoven’s “Sonata No. 7” for piano and violin, before being joined by Dr. Guglielmo Manfredi, on French horn, for Brahms’ “Horn Trio in E-Flat Major, Op 40.” …