Prepare against Mark Thomas
United Kingdom · World #60,396 classical · FIDE ID 1801791
When preparing against Mark Thomas, expect 1.e4 in 98% of White games. Against 1.e4 the reply is 1...g6 (81% of games); against 1.d4, 1...g6 (60%). Lowest win rate among frequent openings: Modern Defense as Black, 40.0% over 25 games.
Our database contains 92 games by Mark Thomas, covering May 2010 to Aug 2026. Below you'll find Mark Thomas's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Mark Thomas 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 | 1,854 | 1,970 | May 2011 |
| Rapid | 1,929 | 1,929 | Aug 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 92 | 35 | 16 | 41 | 38.0% |
| As White | 48 | 18 | 6 | 24 | 37.5% |
| As Black | 44 | 17 | 10 | 17 | 38.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Mark Thomas's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Mark Thomas's side.
First moves as White (48 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 47 | 97.9% | 44.7% |
| b3 | 1 | 2.1% | 0.0% |
Main lines as White
- 1.e4 — 98% of White games, 44.7% score
- …c5 (34% of these games) — Thomas usually continues Nc3 (62.5% score)
- …e5 (23% of these games) — Thomas usually continues Nf3 (50.0% score)
- …c6 (21% of these games) — Thomas usually continues d3 (40.0% score)
- 1.b3 — 2% of White games, 0.0% score
- …e5 (100% of these games) — Thomas usually continues Bb2 (0.0% score)
As Black against 1.e4 (16 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| g6 | 13 | 81.3% | 46.2% |
| Nc6 | 2 | 12.5% | 50.0% |
| d6 | 1 | 6.3% | 0.0% |
As Black against 1.d4 (20 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| g6 | 12 | 60.0% | 50.0% |
| d6 | 7 | 35.0% | 57.1% |
| Nf6 | 1 | 5.0% | 0.0% |
Mark Thomas's chess games
All 92 games by Mark Thomas in the Chess.ceo database (May 2010 - Aug 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: 35 wins, 16 draws, 41 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B23 | Sicilian: Closed | 12 | 6/3/3 | 50.0% |
| B10 | Caro-Kann | 5 | 1/2/2 | 20.0% |
| C20 | Portuguese Opening | 4 | 1/0/3 | 25.0% |
| C00 | French Defense | 3 | 2/0/1 | 66.7% |
| B11 | Caro-Kann: Two Knights Variation | 3 | 3/0/0 | 100.0% |
| B13 | Caro-Kann: Exchange Variation | 2 | 1/0/1 | 50.0% |
| B20 | Sicilian | 2 | 0/0/2 | 0.0% |
| C00 | King's Indian Attack | 2 | 0/0/2 | 0.0% |
| B22 | Sicilian: Alapin | 2 | 0/0/2 | 0.0% |
| C44 | Danish Gambit | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B06 | Modern Defense | 25 | 10/6/9 | 40.0% |
| A21 | Queen's Pawn Game | 3 | 1/2/0 | 33.3% |
| A41 | Rat Defense | 3 | 2/0/1 | 66.7% |
| E90 | King's Indian Defense: Orthodox Variation | 3 | 0/1/2 | 0.0% |
| A48 | Indian Defense | 2 | 1/0/1 | 50.0% |
| B07 | Pirc Defense | 2 | 0/0/2 | 0.0% |
| C44 | Scotch Game | 1 | 0/0/1 | 0.0% |
| B08 | Dunst Opening | 1 | 1/0/0 | 100.0% |
| E73 | King's Indian Defense: Averbakh System | 1 | 0/0/1 | 0.0% |
| B00 | Nimzowitsch Defense | 1 | 1/0/0 | 100.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Apr 2009 | Alan Spice | 2,159 | ch-WLS | B08 |
| Mar 2010 | Martin Mitchell | 2,147 | Blackpool Open 34th | B00 |
| Apr 2009 | David L Roberts | 2,107 | ch-WLS | B06 |
| Apr 2009 | Thomas Brown | 2,053 | ch-WLS | B23 |
| Feb 2009 | Gareth Yeo | 2,044 | chT3-BCF 0809 (4NCL) | A40 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Cardiff Welsh Open | 2023 | 14 | 7.5 | 1,575 |
| ch-WLS | 2010 | 13 | 4 | 1,917 |
| 20th South Wales Int | 2025 | 9 | 4.5 | 1,925 |
| ch-WLS B 68th | 2024 | 7 | 5 | 1,932 |
| Welsh Championships 2026 | Open | 2026 | 6 | 2 | 1,594 |
| chT3-BCF 0910 (4NCL) | 2010 | 6 | 3.5 | 2,061 |
| South Wales Late Summer Open | 2022 | 5 | 2 | 1,713 |
| South Wales Autumn Open | 2022 | 5 | 3 | 1,807 |
Interactive opening tree from all 92 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Mark Thomas's chess games?
92 games by Mark Thomas, from May 2010 to Aug 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 Mark Thomas has played.
What does Mark Thomas play on the first move as White?
Across 48 games with White in our database, Mark Thomas opens with 1.e4 (98% of games), 1.b3 (2% of games). Against 1.e4 as Black, Mark Thomas answers 1...g6 (81% of games), 1...Nc6 (13% of games), 1...d6 (6% of games). Against 1.d4: 1...g6 (60% of games), 1...d6 (35% of games), 1...Nf6 (5% of games).
What openings does Mark Thomas play as White?
As White, Mark Thomas's most-played openings in our database are: Sicilian: Closed (12 games, 50.0% win rate); Caro-Kann (5 games, 20.0% win rate); Portuguese Opening (4 games, 25.0% win rate). The full breakdown of 48 games with White is in the table above.
What openings does Mark Thomas play as Black?
As Black, Mark Thomas most often plays: Modern Defense (25 games, 40.0% win rate); Queen's Pawn Game (3 games, 33.3% win rate); Rat Defense (3 games, 66.7% win rate). See the table above for the top ten Black openings across 44 games.
What is Mark Thomas's FIDE rating?
Mark Thomas is currently rated 1,854 in classical chess, 1,929 in rapid. Peak classical rating: 1,970 (May 2011).
How many games has Mark Thomas played?
Our database contains 92 games by Mark Thomas, covering May 2010 to Aug 2026. Overall record: 35 wins, 16 draws, 41 losses (38.0% win rate).
How do I prepare against Mark Thomas?
92 games by Mark Thomas 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.