In 1975, he became the
European Junior Chess Champion. He gained the
Grandmaster title in 1978 and was
British champion in 1980. Nunn has twice won individual gold medals at
Chess Olympiads. In 1989, he finished sixth in the
inaugural World Cup, a series of tournaments in which the top 25 players in the world competed. His best performance in the
World Chess Championship cycle came in 1987, when he lost a playoff match against
Lajos Portisch for a place in the
Candidates Tournament. At the prestigious
Hoogovens tournament (held annually in
Wijk aan Zee) he was a winner in 1982, 1990 and 1991. Nunn achieved his highest
Elo rating of 2630 in January 1995. Six years earlier, in January 1989, his then rating of 2620 was high enough to elevate him into the world's top ten, where he shared ninth place. This was close to the peak of the English chess boom, and there were two English players above him on the list:
Nigel Short (world number three, 2650) and
Jonathan Speelman (world number five, 2640). Nunn has now retired from serious tournament play and, until he resurfaced as a player in two Veterans events in 2014 and 2015, had not played a FIDE-rated game since August 2006; however, he has been active in the
ECF rapid play. As well as being a strong player, Nunn is regarded as one of the best contemporary authors of chess books. He has penned many books, including
Secrets of Grandmaster Chess, which won the
British Chess Federation Book of the Year award in 1988, and ''John Nunn's Best Games'', which took the award in 1995. He is the director of chess publishers
Gambit Publications. Chess historian
Edward Winter has written of him: A
polymath, Nunn has written authoritative monographs on openings, endings and compositions, as well as annotated games collections and autobiographical volumes. As an annotator he is equally at home presenting lucid prose descriptions for the relative novice and analysis of extreme depth for the expert. In a 2010 interview,
Magnus Carlsen said he thought extreme intelligence could be a hindrance to one's chess career. As an example of this, he cited Nunn: I am convinced that the reason the Englishman John Nunn never became world champion is that he is too clever for that. ... He has so incredibly much in his head. Simply too much. His enormous powers of understanding and his constant thirst for knowledge distracted him from chess. Nunn is also involved with
chess problems, composing several examples and solving as part of the British team on several occasions. On this subject he wrote
Solving in Style (1985). He won the
World Chess Solving Championship in
Halkidiki, Greece, in September 2004 and also made his final GM norm in problem solving. There were further wins of the World Solving Championship in 2007 and in 2010. He is the third person ever to gain both over-the-board and solving GM titles (the others being
Jonathan Mestel and
Ram Soffer;
Bojan Vučković has been the fourth since 2008). Nunn has long been interested in computer chess. In 1984, he began annotating games between computers for
Personal Computer World magazine, and joined the editorial board of
Frederic Friedel's
Computerschach & Spiele magazine. In 1987, he was announced as the first editor of the newly created
Chessbase magazine. The 1992 release of his first book making use of chess
endgame tablebases,
Secrets Of Rook Endings, was later followed by
Secrets of Minor-Piece Endings, and
Secrets Of Pawnless Endings. These books include human-usable endgame strategies found by Nunn (and others) by extensive experimentation with tablebases, and new editions have come out and are due as more tablebases are created and tablebases are more deeply data-mined. Nunn is thus (as of 2004) the foremost data miner of
chess endgame tablebases. Nunn finished third in the
World Senior Chess Championship (over-50 section) of 2014 in
Katerini, Greece, second in the
European Senior Chess Championship (over-50) of 2015 in
Eretria, Greece, and first in the World Senior Chess Championship (over-65 section) in
Assisi, Italy in 2022. He was the winner again in 2023, at
Terrasini. ==Notable games==