Kovchan competed in Grandmaster Group C of the 75th Tata Steel Chess Tournament from 11–27 January 2013 in Wijk aan Zee where he finished 5th place by scoring 7½/13 (+3 =9 -1).
Playing at the Wijk aan Zee Corus 'C' (mixed) event of 2008, she found the standard very tough and finished towards the bottom of the Group, equal with Peng Zhaoqin on 4½/13.
Wijk aan Zee, part of the municipality Beverwijk, in North Holland, the Netherlands
This was three years after the Danish village of Tommerup had claimed such a title, but this time a large project was to ensue.
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During this period, he finished second equal at the Essent tournament, was co-winner of the strong Karabakh 'B' tournament and scored well at the Wijk aan Zee Corus 'C' tourney, earning an upgrade to the 'B' tournament in 2006.
There were also outright or shared first places at Wijk aan Zee, Belgrade, Emmen (all 1972) and the Travnik zonal tournament of 1978.
Tournaments he has won or shared first include the 1969 Swedish Chess Championship, Göteborg 1971, Dortmund 1973, Camagüez 1974, Cienfuegos 1975, Belgrade 1977, Buenos Aires 1978, Hastings 1978–79, Phillips & Drew 1980, Johannesburg 1981, Phillips & Drew 1982, Turin 1982, Wijk aan Zee 1983, Reggio Emilia 1985, Rome 1985, and Rome 1986.