| 2162.7 | 2160.5 | 20 | 20 | De Abreu, RN (Roberto) | FM | GJM | 2117.8 | 2116.4 | 2019 South African Closed Chess Championships (Open A) | 4 | 2019-12-10 | S | B | 0.5 | 0.51 | -0.01 | -0.2 | 0.51 | -0.01 | -0.2 |
| 2160.3 | 2163.5 | 20 | 20 | De Abreu, RN (Roberto) | FM | GJM | 2146.7 | 2140.8 | The Outpost Chess Club Open 2018 (A) | 4 | 2018-03-17 | S | B | 0.5 | 0.47 | 0.03 | 0.5 | 0.48 | 0.02 | 0.4 |
| 2142.5 | 2142.5 | 20 | 20 | De Abreu, RN (Roberto) | FM | GJM | 2177.4 | 2177.4 | JCC Wits 2018 (A) | 3 | 2018-02-25 | S | W | 1 | 0.5 | 0.5 | 8.4 | 0.5 | 0.5 | 10 |
| 2133 | 2133 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 2124 | 2124 | Jnw Club - Maragon Open 2017 (A) | 5 | 2017-06-03 | S | B | 0.5 | 0.51 | -0.01 | -0.2 | -0.01 | 0.51 | 10.2 |
| 2044 | 2044 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 1902 | 1902 | 2017 Pss Prestige (Rapid) | 6 | 2017-04-22 | R | B | 1 | 0.69 | 0.31 | 4.1 | 0.31 | 0.69 | 13.8 |
| 2122 | 2122 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 2081 | 2081 | Jnw Club - Trinityhouse Randpark Open 2017 (A) | 3 | 2017-03-25 | S | B | 0.5 | 0.56 | -0.06 | -1 | -0.06 | 0.56 | 11.2 |
| 2089 | 2089 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 2064 | 2064 | Jmc Adult Open 2016 | 5 | 2016-08-07 | S | W | 0.5 | 0.53 | -0.03 | -0.6 | -0.03 | 0.53 | 10.6 |
| 2065 | 2065 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 2077 | 2077 | Trinityhouse Little Falls 2016 (A-Section) | 6 | 2016-02-20 | S | B | 0.5 | 0.48 | 0.02 | 0.3 | 0.02 | 0.48 | 9.6 |
| 2124 | 2124 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 2059 | 2059 | Jnw Chess Linden Open 2015 (A Section) | 3 | 2015-04-18 | S | W | 0.5 | 0.59 | -0.09 | -1.5 | -0.09 | 0.59 | 11.8 |
| 2042 | 2042 | 20 | 20 | De Abreu, Rn (Roberto) | FM | GJM | 1858 | 1858 | Jnw Chess Blairgowrie Open 2015 (Section A) | 4 | 2015-01-31 | R | B | 1 | 0.74 | 0.26 | 3.1 | 0.26 | 0.74 | 14.8 |
| 2103 | 2103 | 20 | 20 | De Abreu, Rn (Roberto) | | GJM | 1999 | 1999 | South African Junior Closed 2014 U18 Boys | 4 | 2014-04-01 | S | W | 1 | 0.64 | 0.36 | 7.2 | 0.36 | 0.64 | 12.8 |
| 2029 | 2029 | 20 | 20 | De Abreu, Rn (Roberto) | PM | GJM | 1869 | 1869 | Accountancy Uj Open 2013 Prestige Section | 2 | 2013-09-06 | S | W | 1 | 0.71 | 0.29 | 5.8 | 0.29 | 0.71 | 14.2 |
| 1958 | 1958 | 20 | 20 | De Abreu, Rn (Roberto) | PM | GW | 1898 | 1898 | South African Junior Closed 2013 U18 Boys | 3 | 2013-04-03 | S | W | 1 | 0.58 | 0.42 | 8.4 | 0.42 | 0.58 | 11.6 |
| 1957 | 1957 | 20 | 20 | De Abreu, Rn (Roberto) | PM | GW | 1879 | 1879 | Gauteng West Trials 2 - High School | 4 | 2012-08-18 | S | B | 0.5 | 0.62 | -0.12 | -2 | -0.12 | 0.62 | 12.4 |
| 1987 | 1987 | 20 | 20 | De Abreu, Rn (Roberto) | PM | GW | 1887 | 1887 | Gauteng West Trials 1 2012 - High School (High School) | 5 | 2012-07-28 | S | B | 0.5 | 0.59 | -0.09 | -1.5 | -0.09 | 0.59 | 11.8 |
| 2018 | 2018 | 20 | 20 | De Abreu, Rn (Roberto) | PM | GW | 1879 | 1879 | Monnas Open A | 3 | 2012-05-19 | S | W | 0 | 0.66 | -0.66 | -11.2 | -0.66 | 0.66 | 13.2 |
