Writer Jessica Duchen looks at the place of Beethoven's piano concertos in his creative life.

17 March 1795: a leonine 24-year-old pianist and composer from the Rhineland named Ludwig van Beethoven is taking Vienna by storm. In his first public concert in the city, he is performing his own Piano Concerto No. 1. The finale has been complete for barely two days: later, his friend Franz Wegeler will recall him racing against the clock to finish it, handing over the sheets of manuscript page by fresh page to four copyists waiting outside. Tonight, what’s more, the piano is a semitone flat, so Beethoven is transposing his solo part into C sharp major.

Beethoven had once made the lengthy journey from Bonn aged 16 to audition for Mozart, with whom he longed to study; but the news that his mother was dying sent him hurrying home again. He spent five years thereafter trying to hold his remaining family together. By the time he returned to Vienna Mozart was dead. The young man became, instead, a student of Joseph Haydn – receiving “the spirit of Mozart from the hands of Haydn”, as his Bonn patron Count Waldstein encouraged him. He lived in Vienna for the rest of his life, even though he loathed the place and its society.

He soon made his name there – at first primarily for his playing and especially his improvisations, which astonished all who heard them. After hearing him play in Prague in 1798, the pianist and composer Václav Tomášek felt so overwhelmed that he could not touch the instrument for several days. Beethoven’s improvisatory powers may be reflected in his piano concertos, 32 piano sonatas and plethora of variations by the remarkable fact that his capacity for invention seems limitless: scarcely, if ever, does he repeat himself.

The five piano concertos in circulation today reflect his development over a period of around 22 years. The earliest, No. 2, was first drafted in the late 1780s; No. 5 was completed in 1809-10, by which time the world of his youth was being swept away by the Napoleonic wars. As his times changed, so did his musical approach. The first three concertos show him as the ambitious young rising star, the fourth as the mature genius seeking to be worthy of his own gifts (of which he was well aware); and in No. 5 he let the scale of his imagination shine out, while someone else did the heavy lifting of actually playing the piano.

Technically, neither No. 1 nor No. 2 was really the first: he had written another (Wo04) aged 14, which is occasionally restored. Sketches also survived for an unfinished sixth, dating from 1815-16, but abandoned on the backburner. If some of the dates around the concertos seem slightly vague, that is probably because Beethoven often wrote slowly, habitually working on several different pieces at the same time. Occasionally, however, he scribbled so fast that the ink scarcely had time to dry; later he would go back and rewrite.

The C major concerto – the official No. 1, with its seat-of-the-pants premiere – was among the latter. It was not published in its final, revised form until March 1801. Even after that he continued to return to it, and ultimately he left three very different, alternative cadenzas for the first movement: the first a simple, straightforward affair, the second more substantial, and the last, much later, probably the longest and most virtuosic that he ever wrote.

Of No. 2 in B flat major, Beethoven wrote self-deprecatingly to his publisher: ‘This concerto I only value at 10 ducats… I do not give it out as one of my best.’ Yet even if he had written no more, chances are we would still love him for this work. Genial, warm, sometimes ridiculously funny it seems to cast a special spotlight upon the youthful Beethoven who was melding together the pure classicism of Mozart with his own rebellious inclinations. It is clear now that he is going to be the ultimate musical disruptor.