Jan Plachetka, born in Trencin, was awarded the IM title in 1973 and the GM title in 1978. He played for Czechoslovak Olympiad teams from 1980 to 1986.
In 1978 he received the grandmaster title . Plachetka was second at the Czechoslovak Individual Championship in 1992 , 1973 and 1988 he reached third place . In 1993 he was Slovak individual champion in Topoľčianky .
Plachetka won or took first place in many tournaments: I.-II. place in Starý Smokovec (1972), I. place in Rimavská Sobota (1975), I.-II. Place in Polanica-Zdrój (1975) 2 , .I-III. place in Maribor (1977), 1st place in Trnava (1979), 1st place in Sofia (1979), I.-II. place in Starý Smokovec (1979), I.-III. Square in Novi Sad (1983), 1st= at Strasbourg (1985), I.-II. Place in Paris (1989) 3 , I.-II. place in Olomouc (2002), I. place in Staré Město (2004) 4 , I.-II. place in Lippstadt(2005) and I.-III. place in Umag (2006).
Since 2009 he has held the title of FIDE Senior Trainer.
Wikipedia article: Ján Plachetka