| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 126. D Mason vs J Jackson |
| 0-1 | 35 | 2012 | British Championship | B31 Sicilian, Rossolimo Variation |
| 127. J L Weller vs D Mason |
| 1-0 | 50 | 2012 | British Championship | E20 Nimzo-Indian |
| 128. D Mason vs R Jain |
| 0-1 | 28 | 2012 | British Championship | D15 Queen's Gambit Declined Slav |
| 129. M Wadsworth vs D Mason |
| ½-½ | 37 | 2012 | British Championship | A36 English |
| 130. D Mason vs A Combie |
| ½-½ | 42 | 2012 | British Championship | B23 Sicilian, Closed |
| 131. S Ledger vs D Mason |
| 0-1 | 23 | 2012 | British Championship | A45 Queen's Pawn Game |
| 132. D Mason vs P J Batchelor |
| ½-½ | 26 | 2012 | British Championship | B10 Caro-Kann |
| 133. J M Foster vs D Mason |
| 0-1 | 35 | 2012 | British Championship | C02 French, Advance |
| 134. D Mason vs D Smerdon |
 | 0-1 | 29 | 2012 | 4NCL 2012/13 | A56 Benoni Defense |
| 135. D J Ledger vs D Mason |
| 1-0 | 41 | 2012 | 4NCL 2012/13 | C18 French, Winawer |
| 136. M J Armstrong vs D Mason |
| 0-1 | 40 | 2013 | British Championship | A96 Dutch, Classical Variation |
| 137. D Mason vs P K Wells |
| ½-½ | 25 | 2013 | British Championship | E29 Nimzo-Indian, Samisch |
| 138. M Hebden vs D Mason |
| 1-0 | 47 | 2013 | British Championship | A48 King's Indian |
| 139. D Mason vs J Lenier |
| 1-0 | 33 | 2013 | British Championship | E73 King's Indian |
| 140. G Jones vs D Mason |
| 1-0 | 22 | 2013 | British Championship | B85 Sicilian, Scheveningen, Classical |
| 141. D Mason vs P Mercs |
| 0-1 | 38 | 2013 | British Championship | A52 Budapest Gambit |
| 142. A Stewart vs D Mason |
| 0-1 | 47 | 2013 | British Championship | A96 Dutch, Classical Variation |
| 143. D Mason vs L Ball |
| 1-0 | 27 | 2013 | British Championship | B07 Pirc |
| 144. M Wadsworth vs D Mason |
| 1-0 | 43 | 2013 | British Championship | C05 French, Tarrasch |
| 145. D Mason vs P J Batchelor |
| ½-½ | 33 | 2013 | British Championship | C03 French, Tarrasch |
| 146. S Dilleigh vs D Mason |
| ½-½ | 14 | 2013 | British Championship | A96 Dutch, Classical Variation |
| 147. D Mason vs A Zhang |
| ½-½ | 48 | 2014 | British Championship | B31 Sicilian, Rossolimo Variation |
| 148. M Fernandez vs D Mason |
| 1-0 | 41 | 2014 | British Championship | C18 French, Winawer |
| 149. D Mason vs R Hughes |
| 1-0 | 42 | 2014 | British Championship | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 150. A B Hoare vs D Mason |
| ½-½ | 37 | 2014 | British Championship | C01 French, Exchange |
Kibitzing
