Botvinnik's Secret Games

Mikhail Botvinnik was the ultimate boy scout of chess

• always prepared! Indeed, his advance preparation for
  his key matches was feared by the greatest. It even
  involved the radio blaring while he was playing training
  games as well as having nicotine-puffing opponents blow
  smoke in his eyes during practice games, in order to
  acclimatise himself for the real thing. Of course, this
  was before the days of modern political correctness
  when smoking in public is regarded by the powersthat-
  be as a heinous crime and is, unlike licking the
  highway clean with your tongue, now generally banned by
  law on health and safety grounds.
  Botvinnik's training games were a well guarded secret
  only shared by a few trusty colleagues, such as the
  Grandmasters Ragozin, Averbakh and Furman. The Soviet
  state was a monument to paranoia at the best of times,
  but suspicion multiplied when world titles hinged on
  secrecy, and these games have lain hidden for decades
  after they were played.
  Botvinnik was World Champion three times, from 1948-
  1957, 1958 -1960 and 1961 -1963. His final championship
  victory against Tal in the 1961 revenge match counts as
  one of the highest scoring rating performances in the
  history of chess. It was of course based on the most
  meticulous preparation, not least in the psychological
  sphere of seeking to find and play positions which were
  not to Tal's taste.
  Grandmaster Jan Timman is one of the most popular and
  colourful players on the modern scene. A finalist in
  the FIDE-World Chess Federation-World Chess Championship
  in 1993, Timman has been the second dominating force
  in Dutch chess after world champion Dr Max Euwe. Here
  Timman presents every Botvinnik training game which
  could be found and subjects the most important to
  typically close analytical and explanatory scrutiny.