Prepare against Derek Clasby
FM · United States · World #3,218 classical · FIDE ID 30932300
When preparing against Derek Clasby, expect 1.e4 in 100% of White games. Against 1.e4 the reply is 1...e5 (94% of games); against 1.d4, 1...Nf6 (92%).
Our database contains 78 games by Derek Clasby, covering Nov 2016 to Aug 2026. Below you'll find Derek Clasby's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Derek Clasby 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 | 2,330 | 2,343 | Jan 2025 |
| Blitz | 2,152 | 2,152 | Aug 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 78 | 28 | 16 | 34 | 35.9% |
| As White | 41 | 17 | 7 | 17 | 41.5% |
| As Black | 37 | 11 | 9 | 17 | 29.7% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Derek Clasby's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Derek Clasby's side.
First moves as White (41 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 41 | 100.0% | 50.0% |
Main lines as White
- 1.e4 — 100% of White games, 50.0% score
- …c5 (49% of these games) — Clasby usually continues Nf3 (45.0% score)
- …e5 (24% of these games) — Clasby usually continues Nf3 (35.7% score)
- …c6 (7% of these games) — Clasby usually continues d4 (50.0% score)
As Black against 1.e4 (18 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 17 | 94.4% | 50.0% |
| c6 | 1 | 5.6% | 100.0% |
As Black against 1.d4 (12 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 11 | 91.7% | 31.8% |
| d5 | 1 | 8.3% | 50.0% |
Derek Clasby's chess games
All 78 games by Derek Clasby in the Chess.ceo database (Nov 2016 - 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: 28 wins, 16 draws, 34 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A08 | Sicilian | 7 | 4/0/3 | 57.1% |
| B90 | Sicilian: Najdorf | 5 | 4/1/0 | 80.0% |
| B34 | Sicilian: Accelerated Dragon | 4 | 0/0/4 | 0.0% |
| C88 | Ruy Lopez: Closed | 3 | 0/1/2 | 0.0% |
| C06 | French: Tarrasch Variation | 3 | 2/0/1 | 66.7% |
| C78 | Ruy Lopez: Morphy Defense | 3 | 0/2/1 | 0.0% |
| B12 | Caro-Kann: Advance Variation | 2 | 1/0/1 | 50.0% |
| C50 | Italian Game | 2 | 2/0/0 | 100.0% |
| B07 | Philidor | 2 | 1/1/0 | 50.0% |
| B04 | Alekhine Defense | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C95 | Ruy Lopez: Closed | 8 | 4/0/4 | 50.0% |
| E97 | King's Indian Defense: Orthodox Variation | 4 | 1/0/3 | 25.0% |
| A48 | London System | 3 | 0/2/1 | 0.0% |
| A13 | English Opening | 3 | 0/1/2 | 0.0% |
| C68 | Ruy Lopez: Exchange | 2 | 0/1/1 | 0.0% |
| C84 | Ruy Lopez: Morphy Defense | 2 | 0/0/2 | 0.0% |
| D00 | Indian Defense | 2 | 1/0/1 | 50.0% |
| E22 | Queen's Gambit Declined: Ragozin Defense | 1 | 0/1/0 | 0.0% |
| A50 | Queen's Indian Defense | 1 | 0/1/0 | 0.0% |
| A50 | Réti Opening | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jul 2020 | Vasil Trichkov | 2,302 | Titled Tue | B90 |
| Jul 2026 | Kaplan,Avi Harrison | 2,297 | 54th Annual World Open | B53 |
| Jul 2020 | Mahel Boyer | 2,294 | Titled Tue | B00 |
| Jun 2022 | Marek Karas | 2,294 | Titled Tue Early | C08 |
| Aug 2023 | Pedro Espinosa | 2,288 | 10th Washington Open | B68 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Titled Tuesday | 2022 | 17 | 8.5 | 2,318 |
| Wch U10 | 2016 | 11 | 6.5 | 1,860 |
| 10th PNWCC Online Blitz JP | 2020 | 10 | 4.5 | 2,178 |
| 51st USA National Open | 2020 | 9 | 5 | 2,320 |
| 54th Annual World Open | 2026 | 5 | 2 | 2,209 |
| 10th Washington Open | 2023 | 5 | 2 | 2,241 |
| Wch U12 | 2018 | 4 | 1.5 | 1,777 |
| 52nd World Open | 2024 | 3 | 1.5 | 2,404 |
Interactive opening tree from all 78 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Derek Clasby's chess games?
78 games by Derek Clasby, from Nov 2016 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 Derek Clasby has played.
What does Derek Clasby play on the first move as White?
Across 41 games with White in our database, Derek Clasby opens with 1.e4 (100% of games). Against 1.e4 as Black, Derek Clasby answers 1...e5 (94% of games), 1...c6 (6% of games). Against 1.d4: 1...Nf6 (92% of games), 1...d5 (8% of games).
What openings does Derek Clasby play as White?
As White, Derek Clasby's most-played openings in our database are: Sicilian (7 games, 57.1% win rate); Sicilian: Najdorf (5 games, 80.0% win rate); Sicilian: Accelerated Dragon (4 games, 0.0% win rate). The full breakdown of 41 games with White is in the table above.
What openings does Derek Clasby play as Black?
As Black, Derek Clasby most often plays: Ruy Lopez: Closed (8 games, 50.0% win rate); King's Indian Defense: Orthodox Variation (4 games, 25.0% win rate); London System (3 games, 0.0% win rate). See the table above for the top ten Black openings across 37 games.
What is Derek Clasby's FIDE rating?
Derek Clasby is currently rated 2,330 in classical chess and 2,152 in blitz. Peak classical rating: 2,343 (Jan 2025).
How many games has Derek Clasby played?
Our database contains 78 games by Derek Clasby, covering Nov 2016 to Aug 2026. Overall record: 28 wins, 16 draws, 34 losses (35.9% win rate).
How do I prepare against Derek Clasby?
78 games by Derek Clasby 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.