The Najdorf Sicilian is synonymous with the all-time great chess openings--and is one of the sharpest and most hotly contested. The companion volume to The Complete Najdorf 6 Bg5, this is the most authoritative and up-to-date coverage available anywhere in the world today.
John Denis Martin Nunn is an English chess grandmaster, a three-time world champion in chess problem solving, a chess writer and publisher, and a mathematician. He is one of England's strongest chess players and once was in the world's top ten.
This book convinced me that I was too old to continue playing the Najdorf variation. It's a sobering moment that many chess-players have no doubt had to confront, if they were the type that played ultra-sharp variations when they were young.
I am not, however, sure what the central problem is. Perhaps I no longer find it easy to remember the zillions of lines of analysis you need in order to be a successful Najdorf player. Another possible explanation is that it doesn't seem sensible to spend several hours a week keeping up with new developments in the theory. Yet another is that I don't care enough about winning to want to learn the opening that maximizes Black's chances. Whatever the explanation, I feel much better playing the Sveshnikov, which only requires moderate quantities of maintenance.