| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 101. D Mason vs R Bates |
| 0-1 | 36 | 2010 | 4NCL 2010/11 | A07 King's Indian Attack |
| 102. L Cernousek vs D Mason |
| 0-1 | 41 | 2011 | 4NCL 2010/11 | A64 Benoni, Fianchetto, 11...Re8 |
| 103. D Mason vs N Birtwistle |
| ½-½ | 12 | 2011 | 4NCL 2010/11 | E10 Queen's Pawn Game |
| 104. D Mason vs C Hanley |
| 0-1 | 40 | 2011 | 4NCL 2010/11 | E10 Queen's Pawn Game |
| 105. J Hawkins vs D Mason |
| 1-0 | 37 | 2011 | 4NCL 2010/11 | A70 Benoni, Classical with 7.Nf3 |
| 106. D Mason vs J Rowson |
| 0-1 | 29 | 2011 | 4NCL 2010/11 | B43 Sicilian, Kan, 5.Nc3 |
| 107. P K Wells vs D Mason |
| ½-½ | 47 | 2011 | British Championship | D86 Grunfeld, Exchange |
| 108. D Mason vs A Yap |
| ½-½ | 18 | 2011 | British Championship | D47 Queen's Gambit Declined Semi-Slav |
| 109. M Brown vs D Mason |
| 1-0 | 39 | 2011 | British Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 110. D Mason vs A Pleasants |
| ½-½ | 24 | 2011 | British Championship | A41 Queen's Pawn Game (with ...d6) |
| 111. J P McKenna vs D Mason |
| 0-1 | 37 | 2011 | British Championship | B90 Sicilian, Najdorf |
| 112. D Mason vs S Gregory |
| ½-½ | 41 | 2011 | British Championship | A50 Queen's Pawn Game |
| 113. V Jones vs D Mason |
| 1-0 | 37 | 2011 | British Championship | D44 Queen's Gambit Declined Semi-Slav |
| 114. D Mason vs R Magee |
| 1-0 | 20 | 2011 | British Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 115. P R Kemp vs D Mason |
| ½-½ | 10 | 2011 | British Championship | C01 French, Exchange |
| 116. D Mason vs C B Jenks |
| 1-0 | 25 | 2011 | British Championship | D02 Queen's Pawn Game |
| 117. D Mason vs A Hunt |
| ½-½ | 21 | 2011 | British Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 118. D Mason vs J C Simmons |
| 1-0 | 27 | 2012 | High Wycombe Open | B25 Sicilian, Closed |
| 119. R Mitra vs D Mason |
| 0-1 | 33 | 2012 | High Wycombe Open | C01 French, Exchange |
| 120. D Mason vs V Hamitevici |
| ½-½ | 29 | 2012 | High Wycombe Open | A57 Benko Gambit |
| 121. R S Jones vs D Mason |
| 1-0 | 33 | 2012 | High Wycombe Open | C18 French, Winawer |
| 122. D Mason vs A J Walton |
| ½-½ | 25 | 2012 | High Wycombe Open | D31 Queen's Gambit Declined |
| 123. R Palliser vs D Mason |
| ½-½ | 31 | 2012 | British Championship | D85 Grunfeld |
| 124. D Mason vs M Grattage |
| 1-0 | 28 | 2012 | British Championship | A16 English |
| 125. S Conquest vs D Mason |
| ½-½ | 24 | 2012 | British Championship | A40 Queen's Pawn Game |
Kibitzing
