Player profile
Mason, Donald J
Dossier
62 of 63 games analyzed.
Accuracy: 90.3%
Opened e4: 19/24Opened d4: 3/24Opened c4: 2/24
Castled kingside: 41Same-side castling: 28Opposite-side castling: 9Castled queenside: 3Did not castle: 3
Played on the kingside: 22Fianchettoed kingside: 13Played in the center: 11Fianchettoed queenside: 4Played on the queenside: 3
Active pieces: 37Initiated exchanges: 30Kept the bishop pair: 29Sacrificed material: 28Isolated pawn: 27Space advantage: 27Backward pawn: 21Avoided exchanges: 12Missed tactics: 11Played gambits: 3
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 24 games 10W 8D 6L
Italian Game 4 games 1W 2D 1L
Classical Variation 3 games 1W 1D 1L
Giuoco Pianissimo
2 games
1W
0D
1L
Giuoco Pianissimo, with a6
1 game
0W
1D
0L
Two Knights Defense 1 game 0W 1D 0L
Modern Bishop's Opening
1 game
0W
1D
0L
Sicilian Defense 4 games 2W 2D 0L
Kan Variation 1 game 1W 0D 0L
Wing Attack, Fianchetto Variation
1 game
1W
0D
0L
Nyezhmetdinov-Rossolimo Attack 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Dragon Variation 1 game 0W 1D 0L
Yugoslav Attack, Old Line
1 game
0W
1D
0L
Delayed Alapin Variation 1 game 0W 1D 0L
with e6
1 game
0W
1D
0L
Caro-Kann Defense 3 games 1W 1D 1L
Tartakower Variation 3 games 1W 1D 1L
(unspecified)
3 games
1W
1D
1L
French Defense 3 games 1W 1D 1L
Advance Variation 3 games 1W 1D 1L
Milner-Barry Gambit, Hector Variation
2 games
1W
0D
1L
Euwe Variation
1 game
0W
1D
0L
Alekhine Defense 2 games 1W 0D 1L
Four Pawns Attack 1 game 0W 0D 1L
Cambridge Gambit
1 game
0W
0D
1L
Exchange Variation 1 game 1W 0D 0L
Voronezh Variation
1 game
1W
0D
0L
Queen's Gambit Declined 2 games 1W 0D 1L
Modern Variation 1 game 1W 0D 0L
Normal Line
1 game
1W
0D
0L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Gambit Accepted 1 game 1W 0D 0L
Classical Defense 1 game 1W 0D 0L
Russian Gambit
1 game
1W
0D
0L
Modern Defense 1 game 1W 0D 0L
Standard Line 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 1 game 0W 1D 0L
Anglo-Dutch Defense 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Nimzo-Indian Defense 1 game 0W 1D 0L
Sämisch Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Four Knights Game 1 game 0W 0D 1L
Scotch Variation 1 game 0W 0D 1L
Belgrade Gambit
1 game
0W
0D
1L
Philidor Defense 1 game 1W 0D 0L
Lion Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
As Black 23 games 4W 6D 13L
French Defense 5 games 1W 0D 4L
Tarrasch Variation 2 games 0W 0D 2L
Open System, Euwe-Keres Line
2 games
0W
0D
2L
Winawer Variation 2 games 0W 0D 2L
Bogoljubow Variation
1 game
0W
0D
1L
Poisoned Pawn Variation Declined
1 game
0W
0D
1L
Schlechter Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Sicilian Defense 4 games 1W 1D 2L
Kalashnikov Variation 2 games 0W 0D 2L
(unspecified)
2 games
0W
0D
2L
Old Sicilian 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Nyezhmetdinov-Rossolimo Attack 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
King's Indian Attack 2 games 0W 1D 1L
Symmetrical Defense 2 games 0W 1D 1L
(unspecified)
2 games
0W
1D
1L
King's Indian Defense 2 games 0W 1D 1L
Normal Variation 2 games 0W 1D 1L
Rare Defenses
2 games
0W
1D
1L
Tarrasch Defense 1 game 1W 0D 0L
Two Knights Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 1 game 0W 0D 1L
King's English Variation 1 game 0W 0D 1L
Reversed Closed Sicilian
1 game
0W
0D
1L
Italian Game 1 game 0W 0D 1L
Two Knights Defense 1 game 0W 0D 1L
Modern Bishop's Opening
1 game
0W
0D
1L
Scotch Game 1 game 0W 0D 1L
Scotch Gambit 1 game 0W 0D 1L
Advance Variation
1 game
0W
0D
1L
Grünfeld Defense 1 game 0W 0D 1L
Exchange Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Nimzo-Indian Defense 1 game 1W 0D 0L
Classical Variation 1 game 1W 0D 0L
Noa Variation
1 game
1W
0D
0L
English Orangutan 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Bishop's Opening 1 game 0W 1D 0L
Vienna Hybrid 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Torre Attack 1 game 0W 0D 1L
Fianchetto Defense 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Ruy Lopez 1 game 0W 1D 0L
Open 1 game 0W 1D 0L
Bernstein Variation
1 game
0W
1D
0L
Blunders Top 4 of 230
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 63 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.10.10 | Round 1: Mason, Donald J - Sowray, Peter J | 1.14 | 2026.10.10 Sowray, Peter J (400971) (2127) | 0 | 87.80% | 1. e4 c6 2. d4 d5 3. Nd2 dxe4 | |
| 2026.08.07 | Round 5: Mason, Donald J - Farrell, Neil | 5.10 | 2026.08.07 Farrell, Neil (2400588) (2111) | ½ | 90.70% | 1. e4 e6 2. d4 d5 3. e5 c5 | |
| 2026.08.06 | Round 4: Singhal, Saket - Mason, Donald J | 4.16 | 2026.08.06 Singhal, Saket (343404545) (1635) | 1 | 97.40% | 1. e4 c5 2. Nf3 Nc6 3. Bc4 e6 | |
| 2026.08.05 | Round 3: Mason, Donald J - Kett, Tim | 3.9 | 2026.08.05 Kett, Tim (1801210) (2097) | 0 | 86.60% | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 | |
| 2026.08.04 | Round 2: Rubeck, Jonathan - Mason, Donald J | 2.18 | 2026.08.04 Rubeck, Jonathan (435678) (1777) | 1 | 86.90% | 1. e4 e6 2. d4 d5 3. Bd3 dxe4 | |
| 2026.08.03 | Round 1: Mason, Donald J - Drugan, Mark A | 1.26 | 2026.08.03 Drugan, Mark A (343416977) (1679) | ½ | 88.60% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.03.15 | Round 11: Watkinson, Phil K - Mason, Donald J | 11.7 | 2026.03.15 Watkinson, Phil K (419079) (1529) | 1 | 94.10% | 1. d4 d5 2. c4 e6 3. Nc3 c5 | |
| 2026.03.15 | Round 10: Etchells, Michael - Mason, Donald J | 10.79 | 2026.03.15 Etchells, Michael (343449298) | 0 | 84.40% | 1. e4 e6 2. d4 d5 3. Nd2 c5 | |
| 2026.03.15 | Round 9: Mason, Donald J - Singh, Adamjeet | 9.65 | 2026.03.15 Singh, Adamjeet (343409369) (1651) | 0 | 78.80% | 1. e4 e6 2. d4 d5 3. e5 c5 | |
| 2026.03.15 | Round 8: Nasiri, Fahim - Mason, Donald J | 8.54 | 2026.03.15 Nasiri, Fahim (483524) (1851) | 0 | 85.10% | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 | |
| 2026.03.15 | Round 7: Mason, Donald J - Swiatkowski, Aram | 7.51 | 2026.03.15 Swiatkowski, Aram (343415210) (1736) | ½ | 96.50% | 1. e4 c6 2. d4 d5 3. Nd2 dxe4 | |
| 2026.03.14 | Round 6: Nawalaniec, Adam - Mason, Donald J | 6.30 | 2026.03.14 Nawalaniec, Adam (21023786) (2176) | 0 | 86.90% | 1. e4 e6 2. d4 d5 3. Nd2 c5 | |
| 2026.03.14 | Round 5: Mason, Donald J - Muhunthan, Charukgan | 5.53 | 2026.03.14 Muhunthan, Charukgan (456365) (1710) | 1 | 93.10% | 1. e4 c5 2. Nf3 e6 3. Nc3 a6 | |
| 2026.03.14 | Round 4: Jackson, James P - Mason, Donald J | 4.25 | 2026.03.14 Jackson, James P (416860) (2308) | 0 | 88.20% | 1. e4 e6 2. d4 d5 3. Nc3 Bb4 | |
| 2026.03.14 | Round 3: Mason, Donald J - Riddoch, Alan | 3.57 | 2026.03.14 Riddoch, Alan (636819) (1699) | 1 | 87.60% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 | |
| 2026.03.14 | Round 2: Quaite, Toby - Mason, Donald J | 2.22 | 2026.03.14 Quaite, Toby (343432832) (1997) | 0 | 86.30% | 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 | |
| 2026.03.14 | Round 1: Mason, Donald J - Aggarwal, Aashi | 1.2 | 2026.03.14 Aggarwal, Aashi (343445896) (1528) | 1 | 93.10% | 1. e4 c6 2. d4 d5 3. Nd2 dxe4 | |
| 2025.07.20 | ECF English Open Championship 2025 | 7.20 | 2025.07.20 Verma, Aditya (426202) (2092) | ½ | 90.70% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2025.07.20 | ECF English Open Championship 2025 | 6.32 | 2025.07.20 Gibson, Christopher A (414697) (1837) | 1 | 96.10% | 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 | |
| 2025.07.19 | ECF English Open Championship 2025 | 5.21 | 2025.07.19 Salmons, Calum (437280) (2085) | 0 | 91.10% | 1. c4 e5 2. Nc3 Nc6 3. g3 f5 | |
| 2025.07.19 | ECF English Open Championship 2025 | 4.35 | 2025.07.19 Keerthi Kumar, Advait (498033) (1873) | 1 | 92.30% | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 | |
| 2025.07.18 | ECF English Open Championship 2025 | 3.23 | 2025.07.18 Badacsonyi, Frankie (460400) (2170) | 0 | 85.70% | 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.07.18 | ECF English Open Championship 2025 | 2.40 | 2025.07.18 Ellson, Louie (343442056) (1854) | 1 | 93.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2025.07.18 | ECF English Open Championship 2025 | 1.13 | 2025.07.18 Emms, John M (400254) (2417) | 0 | 88.20% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2025.02.15 | Round 5: Pein, Jonathan - Mason, Donald J | 5.9 | 2025.02.15 Pein, Jonathan (417092) (2272) | ½ | 89.90% | 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 | |
| 2025.01.26 | Round 4: Mason, Donald J - Mihalik, Agoston | 4.26 | 2025.01.26 Mihalik, Agoston (719021) (2133) | ½ | 92.20% | 1. e4 c5 2. Nf3 e6 3. c3 d5 | |
| 2025.01.25 | Round 3: Hobson, Kenneth - Mason, Donald J | 3.2 | 2025.01.25 Hobson, Kenneth (480819) (2138) | 0 | 87.80% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2024.11.23 | Round 1: Shearsby, Jude - Mason, Donald J | 1.34 | 2024.11.23 Shearsby, Jude (462527) (2224) | 0 | 86.00% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2024.08.02 | Round 5: Mason, Donald J - Henderson, David | 5.10 | 2024.08.02 Henderson, David (430021) (2057) | ½ | 91.00% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2024.08.01 | Round 4: Zeidler, Sven P. - Mason, Donald J | 4.8 | 2024.08.01 Zeidler, Sven P. (1800604) (2140) | 0 | 86.80% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | |
| 2024.07.31 | Round 3: Mason, Donald J - Baer, Bruce L | 3.12 | 2024.07.31 Baer, Bruce L (488801) (1949) | 1 | 86.40% | 1. e4 g6 2. d4 Bg7 3. Nc3 a6 | |
| 2024.07.30 | Round 2: Wilson, Matthew R - Mason, Donald J | 2.14 | 2024.07.30 Wilson, Matthew R (423459) (1832) | ½ | 95.30% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nf6 | |
| 2024.07.29 | Round 1: Mason, Donald J - Strugar, Ioan-Euzeb | 1.19 | 2024.07.29 Strugar, Ioan-Euzeb (42201381) (1664) | ½ | 96.30% | 1. c4 f5 2. Nc3 e5 3. d4 exd4 | |
| 2024.06.23 | Round 7: Mason, Donald J - Alldritt, Nigel R E | 2024.06.23 Alldritt, Nigel R E (404543) (1974) | 1 | 97.30% | 1. e4 e6 2. d4 d5 3. e5 c5 | ||
| 2024.06.22 | Round 6: Sachdeva, Ronit - Mason, Donald J | 2024.06.22 Sachdeva, Ronit (343401589) (1907) | 0 | 86.00% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | ||
| 2024.06.22 | Round 5: Mason, Donald J - Yu, Rock | 2024.06.22 Yu, Rock (489000) (1939) | ½ | 89.40% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | ||
| 2024.06.21 | Round 4: He, Tom Junde - Mason, Donald J | 2024.06.21 He, Tom Junde (488810) (1902) | ½ | 88.90% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | ||
| 2024.06.21 | Round 3: Mason, Donald J - Okhai, Shabir | 2024.06.21 Okhai, Shabir (445134) (2099) | 0 | 87.40% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | ||
| 2024.06.20 | Round 2: Damodaran, Patrick - Mason, Donald J | 2024.06.20 Damodaran, Patrick (465429) (1934) | 1 | 95.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | ||
| 2024.06.20 | Round 1: Mason, Donald J - Jones, Gawain C B | 2024.06.20 Maroroa Jones, Gawain C B (409561) (2633) | 0 | 98.30% | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 | ||
| 2024.05.28 | Round 7: Regan, Natasha K - Mason, Donald J | 2024.05.28 Regan, Natasha K (403067) (2007) | ½ | 96.90% | 1. Nf3 Nf6 2. c4 g6 3. b4 Bg7 | ||
| 2024.05.27 | Round 5: Mason, Donald J - Dishman, Stephen | 2024.05.27 Dishman, Stephen (403024) (2294) | 0 | 90.60% | 1. c4 e6 2. d4 d5 3. cxd5 exd5 | ||
| 2024.05.26 | Round 4: Pitcher, John - Mason, Donald J | 2024.05.26 Pitcher, John (411485) (2182) | ½ | 93.60% | 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 | ||
| 2024.05.25 | Round 3: Mason, Donald J - Hymer, Barry | 2024.05.25 Hymer, Barry (452238) (1943) | 1 | 92.30% | 1. e4 d6 2. d4 Nf6 3. Nc3 e5 | ||
| 2024.05.25 | Round 2: Davies, Nigel R - Mason, Donald J | 2024.05.25 Davies, Nigel R (404420) (2332) | 0 | 79.00% | 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 | ||
| 2024.05.24 | Round 1: Mason, Donald J - Drugan, Mark A | 2024.05.24 Drugan, Mark A (343416977) (1796) | 1 | 92.00% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | ||
| 2024.05.04 | Round 9: Samarakoon, Vivash Ransara - Mason, Donald J | 2024.05.04 Samarakoon, Vivash Ransara (9982949) (1980) | ½ | 97.60% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.04.10 | 3rd 4NCL Easter Congress: Open | 7.8 | 2023.04.10 Dignam, Matthew P (2057) | ½ | 95.00% | 1. e4 e6 2. d4 d5 3. e5 c5 | |
| 2023.04.10 | 3rd 4NCL Easter Congress: Open | 6.14 | 2023.04.10 Kothari, Jai (477117) (1722) | 1 | 92.20% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2023.04.09 | 3rd 4NCL Easter Congress: Open | 4.15 | 2023.04.09 Liu, Jason (1965) | ½ | 96.60% | 1. e4 e6 2. d4 d5 3. e5 c5 | |
| 2023.04.08 | 3rd 4NCL Easter Congress: Open | 2.22 | 2023.04.08 Cast, Julian (473928) (1890) | 1 | 93.90% | 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 | |
| 2023.04.07 | 3rd 4NCL Easter Congress: Open | 1.18 | 2023.04.07 Gordon, Sean (1753) | 0 | 90.00% | 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 | |
| Round 7: Mason, Donald J - Coffey, Mike J | 7.12 | Coffey, Mike J (462985) | ½ | 88.50% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | ||
| Round 6: Brett, Andrew R - Mason, Donald J | 6.9 | Brett, Andrew R (416460) (2061) | ½ | - | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | ||
| Round 5: Mason, Donald J - Letton, Rob | 5.16 | Letton, Rob (464384) (1711) | 1 | 97.20% | 1. e4 c5 2. Nf3 g6 3. c3 Bg7 | ||
| Round 4: Cook, Philip - Mason, Donald J | 4.16 | Cook, Philip (476684) (1844) | ½ | 94.90% | 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 | ||
| Round 3: Mason, Donald J - Giulian, Rosemary A | 3.13 | Giulian, Rosemary A (2400375) (1861) | ½ | 94.50% | 1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 | ||
| Round 2: Arkell, Keith C - Mason, Donald J | 2.1 | Arkell, Keith C (400270) (2363) | 0 | 84.00% | 1. c4 g6 2. Nf3 Bg7 3. g3 Nf6 | ||
| Round 1: Mason, Donald J - Polanyk, John | 1.18 | Polanyk, John (343459129) (1771) | 1 | 97.20% | 1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 | ||
| 2023.06.18 | Round 5: Mircea-Marius Mesesan - Donald J Mason | 2023.06.18 Mircea-Marius Mesesan | 1 | 96.60% | 1. e4 c5 2. Nf3 Nc6 3. g3 g6 | ||
| 2023.06.18 | Round 4: Donald J Mason - Anum Sheikh | 2023.06.18 Anum Sheikh | 1 | 94.30% | 1. e4 c5 2. Nc3 e6 3. Nf3 d5 | ||
| 2023.06.17 | Round 3: Sean Gordon - Donald J Mason | 2023.06.17 Sean Gordon | ½ | 85.20% | 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 | ||
| 2023.06.17 | Round 2: Donald J Mason - Billy Fellowes | 2023.06.17 Billy Fellowes | 0 | 81.50% | 1. e4 Nc6 2. Nf3 d6 3. d4 Nf6 |