Prepare against Mason So
United Kingdom · World #136,709 classical · FIDE ID 343465315
When preparing against Mason So, expect 1.d4 in 75% of White games. Against 1.e4 the reply is 1...c5 (100% of games); against 1.d4, 1...Nf6 (100%).
Our database contains 32 games by Mason So, covering Sep 2025 to Oct 2026. Below you'll find Mason So's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Mason So before a game. You can open the same data in the free interactive preparation workstation, which builds a move-by-move opening tree from every game.
Ratings
| Time control | Current | Peak | Peak date |
|---|---|---|---|
| Classical | 1,630 | 1,652 | Apr 2026 |
| Rapid | 1,487 | 1,512 | Nov 2025 |
| Blitz | 1,603 | 1,603 | Oct 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 32 | 17 | 4 | 11 | 53.1% |
| As White | 16 | 10 | 2 | 4 | 62.5% |
| As Black | 16 | 7 | 2 | 7 | 43.8% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Mason So's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Mason So's side.
First moves as White (16 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 12 | 75.0% | 66.7% |
| e4 | 4 | 25.0% | 75.0% |
Main lines as White
- 1.d4 — 75% of White games, 66.7% score
- …d5 (50% of these games) — So usually continues Bf4 (66.7% score)
- …Nf6 (33% of these games) — So usually continues Bf4 (75.0% score)
- …e6 (8% of these games) — So usually continues Bf4 (0.0% score)
- 1.e4 — 25% of White games, 75.0% score
- …c5 (50% of these games) — So usually continues Nf3 (50.0% score)
- …e5 (25% of these games) — So usually continues Nf3 (100.0% score)
- …g6 (25% of these games) — So usually continues d4 (100.0% score)
As Black against 1.e4 (10 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 10 | 100.0% | 60.0% |
As Black against 1.d4 (5 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 5 | 100.0% | 20.0% |
Mason So's chess games
All 32 games by Mason So in the Chess.ceo database (Sep 2025 - Oct 2026) are free to browse, search and replay: filter by opening, opponent, event or date on the player page, or step through any game on the analysis board. Record: 17 wins, 4 draws, 11 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D00 | London System | 9 | 5/2/2 | 55.6% |
| A40 | Modern Defense | 2 | 2/0/0 | 100.0% |
| C78 | Ruy Lopez: Morphy Defense | 1 | 1/0/0 | 100.0% |
| B34 | Sicilian: Accelerated Dragon | 1 | 1/0/0 | 100.0% |
| B33 | Sicilian: Sveshnikov | 1 | 0/0/1 | 0.0% |
| D02 | Queen's Pawn Game | 1 | 0/0/1 | 0.0% |
| Indian Defense | 1 | 1/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B30 | Sicilian | 8 | 4/2/2 | 50.0% |
| A48 | Indian Defense | 3 | 1/0/2 | 33.3% |
| E01 | Catalan | 2 | 0/0/2 | 0.0% |
| B22 | Sicilian: Alapin | 2 | 1/0/1 | 50.0% |
| A37 | English Opening: Symmetrical | 1 | 1/0/0 | 100.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Feb 2026 | Mohammad Hossein Mozaffari | 1,979 | 1st Milton Keynes FIDE Rated Blitz | A45 |
| Jan 2026 | James Weldon | 1,712 | 4NCL Bradford U1700 | A40 |
| Jul 2026 | Rob Coles | 1,669 | Sussex University Masters U2050 | D02 |
| Jun 2026 | Jasper Mun | 1,658 | 2026 British Primary Team Challenge Final | A48 |
| Jan 2026 | Chris W Ford | 1,654 | 4NCL Bradford U1700 | C02 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| 2026 Delancey UKCC Challengers Under 10 | 2026 | 9 | 5 | 1,561 |
| 2026 British Chess Championships: Under 10 | 2026 | 5 | 3 | 1,325 |
| 2026 British Primary Team Challenge Final | 2026 | 4 | 3.5 | 1,922 |
| 4NCL Bradford U1700 | 2026 | 4 | 2.5 | 1,781 |
| Sussex University Masters U2050 | 2026 | 4 | 1.5 | 1,579 |
| 1st Milton Keynes FIDE Rated Blitz | 2026 | 3 | 1 | 1,779 |
| 2026 British Chess Championships: | 2026 | 3 | 2.5 | 1,689 |
Interactive opening tree from all 32 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Mason So's chess games?
32 games by Mason So, from Sep 2025 to Oct 2026, are free to browse and replay move by move — no signup needed. The preparation view groups them into an opening tree showing every line Mason So has played.
What does Mason So play on the first move as White?
Across 16 games with White in our database, Mason So opens with 1.d4 (75% of games), 1.e4 (25% of games). Against 1.e4 as Black, Mason So answers 1...c5 (100% of games). Against 1.d4: 1...Nf6 (100% of games).
What openings does Mason So play as White?
As White, Mason So's most-played openings in our database are: London System (9 games, 55.6% win rate); Modern Defense (2 games, 100.0% win rate); Ruy Lopez: Morphy Defense (1 games, 100.0% win rate). The full breakdown of 16 games with White is in the table above.
What openings does Mason So play as Black?
As Black, Mason So most often plays: Sicilian (8 games, 50.0% win rate); Indian Defense (3 games, 33.3% win rate); Catalan (2 games, 0.0% win rate). See the table above for the top ten Black openings across 16 games.
What is Mason So's FIDE rating?
Mason So is currently rated 1,630 in classical chess, 1,487 in rapid and 1,603 in blitz. Peak classical rating: 1,652 (Apr 2026).
How many games has Mason So played?
Our database contains 32 games by Mason So, covering Sep 2025 to Oct 2026. Overall record: 17 wins, 4 draws, 11 losses (53.1% win rate).
How do I prepare against Mason So?
32 games by Mason So reveal their opening repertoire, most-played lines, and the variations where they score worst — the raw material for targeted preparation. The interactive opening tree lets you walk every line to any depth.