Medal from the first Karpov vs. Kasparov world chess championship match

The infamous unlimited 1984 World Chess Championship match between Anatoly Karpov and Garry Kasparov took place in Moscow, USSR. This controversial match was supposed to continue until one player won 6 games, with no limit on the number of draws. After 48 games and five months of intense competition, the match was abandoned in February 1985 with Karpov leading 5-3 (with 40 draws). The title was not awarded, and a rematch was scheduled for later that year. The match took place in the House of Unions, a famous concert hall of the time, which is engraved on the reverse side of the medal.