João Mário Ribeiro
| Personal information | |
|---|---|
| Born | 10 June 1929 |
| Died | 21 September 2021 (aged 92) |
| Chess career | |
| Country | Portugal |
João Mário Ribeiro (10 June 1929 – 21 September 2021) was a Portuguese chess player, three-time Portuguese Chess Championships winner (1954, 1963, 1971).