Little fanfare greeted the bicentennial of Charles-Valentin Alkan, on Nov. 30, but next Sunday the British pianist Jack Gibbons — seen playing Le Festin d'Ésope above — will honor the great Romantic outlier by performing the complete set of Twelve Studies in All the Minor Keys, Op. 39, at Merkin Hall. Back in 1996, in the same space, Marc-André Hamelin played the Concerto for Solo Piano, from the Op. 39 set. Gibbons may not match Hamelin's extreme virtuosity, but he seems to have technique commensurate to the task.