| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 276. Y Gatineau vs A Demuth |
| ½-½ | 46 | 2018 | French Team Championship | A57 Benko Gambit |
| 277. A Demuth vs J F Nelis |
| ½-½ | 23 | 2018 | French Team Championship | A36 English |
| 278. P Barbot vs A Demuth |
| ½-½ | 16 | 2018 | French Team Championship | D32 Queen's Gambit Declined, Tarrasch |
| 279. S Cossin vs A Demuth |
| ½-½ | 15 | 2018 | French Team Championship | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
| 280. A Demuth vs S Hautot |
| ½-½ | 32 | 2018 | European Club Cup | D12 Queen's Gambit Declined Slav |
| 281. A Demuth vs D Kosic |
 | 0-1 | 35 | 2018 | European Club Cup | E00 Queen's Pawn Game |
| 282. V Fedoseev vs A Demuth |
| 1-0 | 26 | 2018 | European Club Cup | C41 Philidor Defense |
| 283. A Demuth vs B Lindberg |
| 1-0 | 55 | 2018 | European Club Cup | E43 Nimzo-Indian, Fischer Variation |
| 284. D Svetushkin vs A Demuth |
| 1-0 | 37 | 2018 | European Club Cup | C60 Ruy Lopez |
| 285. A Demuth vs I van der Lende |
| 1-0 | 28 | 2018 | European Club Cup | A06 Reti Opening |
| 286. O Sulypa vs A Demuth |
| ½-½ | 35 | 2018 | European Club Cup | A88 Dutch, Leningrad, Main Variation with c6 |
| 287. A Burnett vs A Demuth |
| 0-1 | 40 | 2018 | 4NCL Div 1a 2018/19 | D02 Queen's Pawn Game |
| 288. A Demuth vs S Franklin |
| ½-½ | 32 | 2018 | 4NCL Div 1a 2018/19 | A05 Reti Opening |
| 289. A Demuth vs S Giraud |
| 1-0 | 15 | 2019 | New Caledonia op | A04 Reti Opening |
| 290. A Demuth vs S Phadke |
| 1-0 | 47 | 2019 | Gibraltar Masters | A83 Dutch, Staunton Gambit |
| 291. Le Quang Liem vs A Demuth |
| 1-0 | 38 | 2019 | Gibraltar Masters | B27 Sicilian |
| 292. A Demuth vs D Belenkaya |
| 1-0 | 58 | 2019 | Gibraltar Masters | B10 Caro-Kann |
| 293. S Tsolakidou vs A Demuth |
| ½-½ | 31 | 2019 | Gibraltar Masters | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 294. A Demuth vs Y Zuo |
| ½-½ | 64 | 2019 | Gibraltar Masters | B30 Sicilian |
| 295. A Kozak vs A Demuth |
| ½-½ | 37 | 2019 | Gibraltar Masters | A46 Queen's Pawn Game |
| 296. A Demuth vs J B Bjerre |
| ½-½ | 30 | 2019 | Gibraltar Masters | B53 Sicilian |
| 297. P Ladron vs A Demuth |
| ½-½ | 79 | 2019 | Gibraltar Masters | C50 Giuoco Piano |
| 298. A Demuth vs I Bulmaga |
| ½-½ | 43 | 2019 | Gibraltar Masters | A28 English |
| 299. A Rosell vs A Demuth |
| ½-½ | 47 | 2019 | TCh-CAT Gp1 | A85 Dutch, with c4 & Nc3 |
| 300. A Demuth vs E Alekseev |
| ½-½ | 21 | 2019 | European Championship | E12 Queen's Indian |
Kibitzing
