The brilliant Paul Morphy was both. He was recognized as the world chess champion but before there was a formal champion.
Boris Spassky of the USSR.
They never played because they were not contemporaries. Paul Morphy had a brilliant but short chess career. He played from 1857 to 1860, when he retired from active play against the top competition, unofficial second world chess champion after Anderssen Adolf. After that, he played casually and in demonstrations playing well blindfolded against many people at the same time. Steinitz did not emerge as a chess power until 20 years later in the 1880s. He became the first official champion in 1886. Steinitz actually met Morphy in New Orleans, but the conditions Morphy set for the meeting were that they could talk about anything except chess. When Maurian delivered Morphy's message to Steinitz, Morphy told him to tell Steinitz that "His gambit (the Steinitz gambit in King's Gambit) is entirely unsound." This shows that Morphy was familiar with Steinitz's games, but he had already given up playing chess with all but his life-long friend Maurian. The most Morphy ever played blindfold at one time was ten, many times it was eight. Nobody ever dared call himself World Chess Champion while Morphy lived. The title was created after Morphy died.
Paul Morphy has written: 'Games of chess'
Before there was an official 'World Champion', American Paul Morphy was considered the unofficial World Champion between 1858-1862. Click on the 'Paul Morphy' link on this page to read his biography.
Paul Charles Morphy has written: 'Morphy gleanings' -- subject(s): Chess
Paul Morphy.
'Deep Blue' defeated chess Grandmaster Garry Kasparov in May of 1997 .
Magnus Carlsen.
Deep blue specialized in being the first computer to defeat a chess champion at chess when it defeated grand master Gary Kasparov.
The current world chess champion is Viswanathan Anand
The answer is Garry Kasparov.