The problem of matching supply and demand will worsen as utilities increase the supply of green energy under mandates like California's, which requires 20% renewable electricity by 2010.

FORBES: Juicing the System

Arum claims that despite frequent conversations with English promoters Frank Warren and Barry Hearn, the relative lack of exposure given to his fighters on English television presents a problem in matching fighters from either side of the Atlantic.

BBC: Big fight diary: Day two

According to McKinsey, the past decade has witnessed a decline in jobs involving transactions and production, while 5 million jobs have been created in interactions that require collective problem-solving or skills matching.

FORBES: Is Your Job Robot-Proof?

Readers may therefore exercise their own judgments by listening to the audio files below, and decide whether, in their opinion, Dr Schwarze has cracked a problem that has defeated instrument-makers for 300 years: matching, or even beating, the Master of Cremona.

ECONOMIST: Violin-making

From the standpoint of the mainstream right, the only problem with his legacy was that no other Republican could come close to matching his public appeal and political savvy.

NEWYORKER: Confounding Fathers