| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 226. K Nikolaidis vs R Guzewicz |
| ½-½ | 41 | 2013 | European Championship | D16 Queen's Gambit Declined Slav |
| 227. K Nikolaidis vs V Jianu |
| 0-1 | 39 | 2014 | European Championship | E94 King's Indian, Orthodox |
| 228. A Chibukhchian vs K Nikolaidis |
| 1-0 | 43 | 2014 | European Championship | E15 Queen's Indian |
| 229. K Nikolaidis vs V Danielyan |
| ½-½ | 62 | 2014 | European Championship | D20 Queen's Gambit Accepted |
| 230. M Codenotti vs K Nikolaidis |
| 1-0 | 39 | 2014 | European Championship | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 231. K Nikolaidis vs S Gaboyan |
| ½-½ | 59 | 2014 | European Championship | B33 Sicilian |
| 232. L Karapetyan vs K Nikolaidis |
| ½-½ | 41 | 2014 | European Championship | B17 Caro-Kann, Steinitz Variation |
| 233. K Nikolaidis vs E Sayadyan |
| 0-1 | 65 | 2014 | European Championship | B76 Sicilian, Dragon, Yugoslav Attack |
| 234. Konstantin Yayloyan vs K Nikolaidis |
| 0-1 | 43 | 2014 | European Championship | B12 Caro-Kann Defense |
| 235. K Nikolaidis vs N Imnadze |
| ½-½ | 43 | 2014 | European Championship | C50 Giuoco Piano |
| 236. A Hoghmrtsyan vs K Nikolaidis |
| ½-½ | 35 | 2014 | European Championship | B18 Caro-Kann, Classical |
| 237. K Nikolaidis vs Z Sturua |
| 0-1 | 37 | 2017 | World Senior 50+ | B09 Pirc, Austrian Attack |
| 238. K Nikolaidis vs M Palac |
| 0-1 | 30 | 2018 | European Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 239. M Perunovic vs K Nikolaidis |
| ½-½ | 50 | 2018 | European Championship | E15 Queen's Indian |
| 240. K Nikolaidis vs I Janik |
| 0-1 | 43 | 2018 | European Championship | B07 Pirc |
| 241. E Danielian vs K Nikolaidis |
| 1-0 | 26 | 2018 | European Championship | B09 Pirc, Austrian Attack |
| 242. K Nikolaidis vs A Yeremyan |
| 1-0 | 60 | 2018 | European Championship | E80 King's Indian, Samisch Variation |
| 243. M Gharibyan vs K Nikolaidis |
| 0-1 | 52 | 2018 | European Championship | E90 King's Indian |
| 244. K Nikolaidis vs D Ozen |
| 0-1 | 46 | 2018 | European Championship | C07 French, Tarrasch |
| 245. E Baglan vs K Nikolaidis |
| 1-0 | 69 | 2018 | European Championship | B12 Caro-Kann Defense |
| 246. K Nikolaidis vs S Suleymanli |
| 1-0 | 36 | 2018 | European Championship | C00 French Defense |
| 247. M Bilous vs K Nikolaidis |
| 1-0 | 44 | 2018 | European Championship | E82 King's Indian, Samisch, double Fianchetto Variation |
| 248. K Nikolaidis vs G Naqopia |
| ½-½ | 49 | 2018 | European Championship | D10 Queen's Gambit Declined Slav |
| 249. E Ubilava vs K Nikolaidis |
| 1-0 | 32 | 2019 | Gibraltar Masters | E46 Nimzo-Indian |
| 250. K Nikolaidis vs P Lombaers |
| 0-1 | 48 | 2019 | Gibraltar Masters | B48 Sicilian, Taimanov Variation |
Kibitzing
