Prepare against Rombaua,Mariel Joseph
PHL · World #82,434 classical · FIDE ID 5206731
When preparing against Rombaua,Mariel Joseph, expect 1.d4 in 100% of White games. Against 1.e4 the reply is 1...c6 (57% of games); against 1.d4, 1...f5 (60%).
Our database contains 34 games by Rombaua,Mariel Joseph, covering Jan 2018 to Oct 2026. Below you'll find Rombaua,Mariel Joseph's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Rombaua,Mariel Joseph 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 | 1,782 | 1,803 | Aug 2019 |
| Rapid | 1,906 | 1,929 | May 2024 |
| Blitz | 1,875 | 1,914 | Aug 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 34 | 17 | 1 | 16 | 50.0% |
| As White | 18 | 11 | 1 | 6 | 61.1% |
| As Black | 16 | 6 | 0 | 10 | 37.5% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Rombaua,Mariel Joseph's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Rombaua,Mariel Joseph's side.
First moves as White (18 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 18 | 100.0% | 63.9% |
Main lines as White
- 1.d4 — 100% of White games, 63.9% score
- …Nf6 (44% of these games) — Joseph usually continues e3 (64.3% score)
- …d5 (28% of these games) — Joseph usually continues e3 (100.0% score)
- …f5 (17% of these games) — Joseph usually continues e4 (100.0% score)
As Black against 1.e4 (7 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c6 | 4 | 57.1% | 25.0% |
| e6 | 1 | 14.3% | 0.0% |
| e5 | 1 | 14.3% | 100.0% |
| d6 | 1 | 14.3% | 100.0% |
As Black against 1.d4 (5 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| f5 | 3 | 60.0% | 66.7% |
| e6 | 1 | 20.0% | 0.0% |
| e5 | 1 | 20.0% | 100.0% |
Rombaua,Mariel Joseph's chess games
All 34 games by Rombaua,Mariel Joseph in the Chess.ceo database (Jan 2018 - 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, 1 draws, 16 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D00 | Queen's Pawn Game | 13 | 9/1/3 | 69.2% |
| A80 | Dutch Defense | 3 | 1/0/2 | 33.3% |
| A43 | Benoni Defense | 1 | 0/0/1 | 0.0% |
| C11 | French: Classical Variation | 1 | 1/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A80 | Dutch Defense | 4 | 2/0/2 | 50.0% |
| A10 | English Opening | 2 | 0/0/2 | 0.0% |
| B15 | Caro-Kann: Main Line | 2 | 0/0/2 | 0.0% |
| A40 | Englund Gambit | 1 | 1/0/0 | 100.0% |
| C06 | French: Tarrasch Variation | 1 | 0/0/1 | 0.0% |
| C30 | King's Gambit | 1 | 1/0/0 | 100.0% |
| A00 | King's Indian Attack | 1 | 0/0/1 | 0.0% |
| B13 | Caro-Kann | 1 | 1/0/0 | 100.0% |
| B12 | Pirc Defense | 1 | 1/0/0 | 100.0% |
| E48 | Caro-Kann: Exchange Variation | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Apr 2021 | Ibrahim Sultan | 2,076 | Sharjah Rapid Open | A83 |
| May 2021 | Hesham Adhami | 2,013 | Sharjah Blitz Open | D00 |
| Aug 2025 | Ahmad Alrefae | 1,841 | 31st Abu Dhabi Blitz Open | A83 |
| Apr 2021 | Ahmed Saif | 1,839 | Sharjah Rapid Open | D00 |
| Apr 2021 | Alshaeby Razan | 1,711 | Sharjah Rapid Open | B13 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Sharjah Rapid Open | 2021 | 9 | 5 | 2,075 |
| Sharjah Blitz Open | 2021 | 9 | 5 | 1,941 |
| Dubai The Arbor Blitz Open | 2019 | 8 | 5.5 | 1,936 |
| 31st Abu Dhabi Blitz Open | 2025 | 7 | 2 | 1,858 |
| California Open | 1992 | 1 | 0 | 1,850 |
Interactive opening tree from all 34 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Rombaua,Mariel Joseph's chess games?
34 games by Rombaua,Mariel Joseph, from Jan 2018 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 Rombaua,Mariel Joseph has played.
What does Rombaua,Mariel Joseph play on the first move as White?
Across 18 games with White in our database, Rombaua,Mariel Joseph opens with 1.d4 (100% of games). Against 1.e4 as Black, Rombaua,Mariel Joseph answers 1...c6 (57% of games), 1...e6 (14% of games), 1...e5 (14% of games). Against 1.d4: 1...f5 (60% of games), 1...e6 (20% of games), 1...e5 (20% of games).
What openings does Rombaua,Mariel Joseph play as White?
As White, Rombaua,Mariel Joseph's most-played openings in our database are: Queen's Pawn Game (13 games, 69.2% win rate); Dutch Defense (3 games, 33.3% win rate); Benoni Defense (1 games, 0.0% win rate). The full breakdown of 18 games with White is in the table above.
What openings does Rombaua,Mariel Joseph play as Black?
As Black, Rombaua,Mariel Joseph most often plays: Dutch Defense (4 games, 50.0% win rate); English Opening (2 games, 0.0% win rate); Caro-Kann: Main Line (2 games, 0.0% win rate). See the table above for the top ten Black openings across 16 games.
What is Rombaua,Mariel Joseph's FIDE rating?
Rombaua,Mariel Joseph is currently rated 1,782 in classical chess, 1,906 in rapid and 1,875 in blitz. Peak classical rating: 1,803 (Aug 2019).
How many games has Rombaua,Mariel Joseph played?
Our database contains 34 games by Rombaua,Mariel Joseph, covering Jan 2018 to Oct 2026. Overall record: 17 wins, 1 draws, 16 losses (50.0% win rate).
How do I prepare against Rombaua,Mariel Joseph?
34 games by Rombaua,Mariel Joseph 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.