| 1953.1 | 1879.3 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1767.3 | 1859.4 | Rylib Summer Slam 2024 (Championship) | 3 | 2024-12-03 | R | B | 0 | 0.67 | -0.67 | -6.3 | 0.48 | -0.48 | -9.6 |
| 1980.3 | 2027.7 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1789.2 | 1797.4 | South African Closed Chess Championship 2024 (Seniors) | 9 | 2024-03-31 | S | B | 0.5 | 0.68 | -0.18 | -3.6 | 0.73 | -0.23 | -4.6 |
| 1986.6 | 2032.3 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1785.3 | 1787.2 | Cape Town Open Chess Championship 2024 (Championship) | 1 | 2024-03-15 | S | B | 1 | 0.69 | 0.31 | 5.8 | 0.74 | 0.26 | 5.2 |
| 1974 | 2005.5 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1790.2 | 1842 | Cape Town Chess Club Annual Blitz Championship 2024 | 9 | 2024-01-07 | B | B | 1 | 0.67 | 0.33 | 1.2 | 0.65 | 0.35 | 7 |
| 1887.8 | 2068.6 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1822.2 | 1989.2 | Chess WP Individual Blitz 2023 (Open) | 7 | 2023-01-03 | B | B | 1 | 0.53 | 0.47 | 1.7 | 0.55 | 0.45 | 9 |
| 1925.6 | 1942.4 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1805 | 1812.8 | Western Cape Club Championship 2022 (Tier 1) | 4 | 2022-10-08 | S | B | 0 | 0.6 | -0.6 | -10.2 | 0.61 | -0.61 | -12.2 |
| 2000.2 | 1929.6 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1820.8 | 1938.2 | Steinitz Individual Rapid 2022 | 5 | 2022-06-10 | R | B | 1 | 0.67 | 0.33 | 2.3 | 0.45 | 0.55 | 11 |
| 2024.1 | 2054.2 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1881.5 | 1900.2 | Western Cape Closed 2021 (Championship) | 2 | 2021-09-24 | S | W | 0 | 0.71 | -0.71 | -14.2 | 0.72 | -0.72 | -14.4 |
| 1993.1 | 2070.5 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1914.4 | 1973.4 | Cape Town Chess Club - Club Championship 2019 (Championship) | 6 | 2019-06-18 | S | W | 0 | 0.63 | -0.63 | -10.5 | 0.65 | -0.65 | -13 |
| 2033.7 | 2064.2 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1972.1 | 2014.7 | Stellenberg Youth Chess Championship 2019 (Presige) | 4 | 2019-05-01 | R | B | 1 | 0.53 | 0.47 | 5.6 | 0.52 | 0.48 | 9.6 |
| 2065.5 | 2109.6 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1968.7 | 1984.1 | 2019 Cape Town Classic Chess Festival (Rapid) | 7 | 2019-03-30 | R | W | 0 | 0.65 | -0.65 | -6.1 | 0.69 | -0.69 | -13.8 |
| 2065.5 | 2096.1 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1968.7 | 2031.6 | 2019 Cape Town Classic Chess Festival (Blitz) | 4 | 2019-03-29 | B | B | 0.5 | 0.57 | -0.07 | -0.3 | 0.53 | -0.03 | -0.6 |
| 2150.4 | 2149 | 20 | 20 | Lewis, MMM (Mark) | PM | WCT | 1995.5 | 2038.6 | Cape Town Chess Club Blitz 2018 | 7 | 2018-04-24 | B | W | 0 | 0.72 | -0.72 | -2.6 | 0.67 | -0.67 | -13.4 |
| 1984 | 1984 | 20 | 20 | Lewis, Mmm (Mark) | PM | WP | 1853 | 1853 | 2017 South African Closed Chess Championships (Senior) | 7 | 2017-12-15 | S | W | 0 | 0.68 | -0.68 | -13.6 | -0.68 | 0.68 | 13.6 |
| 2059 | 2059 | 20 | 20 | Lewis, Mmm (Mark) | PM | WP | 1878 | 1878 | South African Open 2016 (A) | 9 | 2016-07-07 | S | W | 1 | 0.74 | 0.26 | 5.2 | 0.26 | 0.74 | 14.8 |
| 2159 | 2159 | 20 | 20 | Lewis, Mmm (Mark) | PM | WP | 1888 | 1888 | South African Open Chess Championships 2016 Blitz | 6 | 2016-07-05 | S | B | 1 | 0.83 | 0.17 | 2.8 | 0.17 | 0.83 | 16.6 |
| 2010 | 2010 | 20 | 20 | Lewis, Mmm (Mark) | PM | WP | 1906 | 1906 | Chess Wp Individual Blitz 2016 | 6 | 2016-04-16 | B | W | 1 | 0.64 | 0.36 | 1.3 | 0.36 | 0.64 | 12.8 |
| 2094 | 2094 | 20 | 20 | Lewis, Mmm (Mark) | | WP | 1900 | 1900 | Curro Open 2014 Elite Section | 2 | 2014-07-25 | S | W | 1 | 0.75 | 0.25 | 5 | 0.25 | 0.75 | 15 |
| 2026 | 2026 | 20 | 20 | Lewis, Mmm (Mark) | PM | WP | 2022 | 2022 | South African Open Chess Championship 2012 (Blitz Championship) | 7 | 2012-06-04 | B | B | 1 | 0.51 | 0.49 | 1.8 | 0.49 | 0.51 | 10.2 |
