Henrique Costa Mecking (born 23 January 1952), also known as Mequinho, is a Brazilian chess grandmaster who reached his zenith in the 1970s and is still one of the strongest players in Brazil.

In 1975, he twice shared second place behind Ljubomir Ljubojević, firstly at Las Palmas with Ulf Andersson and Mikhail Tal, and then at Manila with Lev Polugaevsky, Bent Larsen and Helmut Pfleger.

[7] Mecking was a regular participant in Candidates Tournaments, the FIDE events used to choose a challenger for the World Chess Championship.

Still, from this time (in the aftermath of Bobby Fischer's effective retirement in 1972) until 1979, Mecking was the strongest player born in the West.

Illness (myasthenia gravis) forced Mecking's withdrawal from the Interzonal at Rio de Janeiro in 1979 after a first round draw with Borislav Ivkov.