Prepare against Mihnea Costachi
IM · Romania · World #921 classical · FIDE ID 1217518
Our database contains 2,559 games by Mihnea Costachi, covering Jul 2008 to Aug 2026. Below you'll find Mihnea Costachi's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Mihnea Costachi 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 | 2,459 | 2,484 | Nov 2018 |
| Rapid | 2,381 | 2,478 | Mar 2022 |
| Blitz | 2,482 | 2,528 | Mar 2019 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 2,559 | 1,351 | 510 | 698 | 52.8% |
| As White | 1,295 | 708 | 259 | 328 | 54.7% |
| As Black | 1,264 | 643 | 251 | 370 | 50.9% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Mihnea Costachi's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Mihnea Costachi's side.
First moves as White (1,295 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 839 | 64.8% | 62.6% |
| e4 | 191 | 14.7% | 72.5% |
| Nc3 | 165 | 12.7% | 62.1% |
| Nf3 | 30 | 2.3% | 66.7% |
| c4 | 18 | 1.4% | 86.1% |
| b3 | 14 | 1.1% | 71.4% |
Main lines as White
- 1.d4 — 65% of White games, 62.6% score
- …Nf6 (62% of these games) — Costachi usually continues c4 (62.5% score)
- …d5 (25% of these games) — Costachi usually continues c4 (68.4% score)
- …e6 (4% of these games) — Costachi usually continues c4 (55.4% score)
- 1.e4 — 15% of White games, 72.5% score
- …c5 (43% of these games) — Costachi usually continues Nf3 (65.7% score)
- …e5 (22% of these games) — Costachi usually continues Nf3 (73.4% score)
- …c6 (12% of these games) — Costachi usually continues Nf3 (55.6% score)
As Black against 1.e4 (584 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 474 | 81.2% | 59.4% |
| c5 | 63 | 10.8% | 69.8% |
| g6 | 19 | 3.3% | 78.9% |
| c6 | 6 | 1.0% | 50.0% |
| a6 | 6 | 1.0% | 83.3% |
| e6 | 4 | 0.7% | 50.0% |
As Black against 1.d4 (466 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 345 | 74.0% | 61.0% |
| d5 | 61 | 13.1% | 59.0% |
| e6 | 16 | 3.4% | 56.3% |
| g6 | 14 | 3.0% | 85.7% |
| c5 | 10 | 2.1% | 65.0% |
| a6 | 10 | 2.1% | 70.0% |
Mihnea Costachi's chess games
All 2,559 games by Mihnea Costachi in the Chess.ceo database (Jul 2008 - 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: 1,351 wins, 510 draws, 698 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D36 | Indian Defense | 146 | 70/43/33 | 47.9% |
| E73 | King's Indian Defense: Averbakh System | 79 | 48/6/25 | 60.8% |
| D00 | Queen's Pawn Game: Chigorin Variation | 76 | 38/10/28 | 50.0% |
| D15 | Slav Defense | 71 | 36/21/14 | 50.7% |
| A57 | Benoni Defense | 68 | 44/8/16 | 64.7% |
| E11 | Bogo-Indian Defense | 51 | 28/12/11 | 54.9% |
| A00 | Dunst Opening | 49 | 23/9/17 | 46.9% |
| D90 | Grünfeld Defense | 47 | 19/17/11 | 40.4% |
| E15 | Queen's Indian Defense | 42 | 16/14/12 | 38.1% |
| D36 | Semi-Slav Defense | 39 | 19/8/12 | 48.7% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C76 | Ruy Lopez: Steinitz Defense Deferred | 77 | 38/11/28 | 49.4% |
| D15 | Slav Defense | 69 | 27/20/22 | 39.1% |
| E70 | King's Indian Defense | 67 | 37/8/22 | 55.2% |
| E62 | Indian Defense | 62 | 33/14/15 | 53.2% |
| E94 | King's Indian Defense: Orthodox Variation | 62 | 31/11/20 | 50.0% |
| E62 | English Opening | 58 | 28/15/15 | 48.3% |
| C54 | Italian Game: Classical Variation | 46 | 28/13/5 | 60.9% |
| C54 | Italian Game: Giuoco Pianissimo | 46 | 31/9/6 | 67.4% |
| C96 | Ruy Lopez: Closed | 44 | 19/13/12 | 43.2% |
| C45 | Scotch Game | 43 | 26/2/15 | 60.5% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| May 2020 | Quang Liem Le | 2,709 | Titled Tue | D11 |
| Nov 2021 | Parham Maghsoodloo | 2,706 | Titled Tue | D26 |
| Mar 2022 | Vladislav Artemiev | 2,700 | Titled Tue Late | D35 |
| Sep 2021 | Jeffery Xiong | 2,700 | Titled Tue | A57 |
| Mar 2023 | David Anton Guijarro | 2,685 | Titled Tue Late | E75 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Titled Tuesday | 2025 | 1,512 | 937 | 2,440 |
| chT-ROM | 2024 | 67 | 43 | 2,403 |
| ch-ROM | 2017 | 50 | 27 | 2,220 |
| ch-EU Blitz | 2023 | 33 | 23 | 2,494 |
| Wch U16 | 2016 | 22 | 15 | 2,434 |
| Wch Blitz | 2021 | 21 | 9.5 | 2,504 |
| World ol U16 | 2016 | 19 | 10 | 2,318 |
| ch-ROM U14 | 2014 | 18 | 15 | 2,099 |
Frequent opponents
Head-to-head records: Bogdan-Daniel Deac (19 games) · Olexandr Bortnyk (11 games) · Constantin Lupulescu (10 games) · Mohamed Ezat (10 games)
Interactive opening tree from all 2,559 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Mihnea Costachi's chess games?
2,559 games by Mihnea Costachi, from Jul 2008 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 Mihnea Costachi has played.
What does Mihnea Costachi play on the first move as White?
Across 1,295 games with White in our database, Mihnea Costachi opens with 1.d4 (65% of games), 1.e4 (15% of games), 1.Nc3 (13% of games). Against 1.e4 as Black, Mihnea Costachi answers 1...e5 (81% of games), 1...c5 (11% of games), 1...g6 (3% of games). Against 1.d4: 1...Nf6 (74% of games), 1...d5 (13% of games), 1...e6 (3% of games).
What openings does Mihnea Costachi play as White?
As White, Mihnea Costachi's most-played openings in our database are: Indian Defense (146 games, 47.9% win rate); King's Indian Defense: Averbakh System (79 games, 60.8% win rate); Queen's Pawn Game: Chigorin Variation (76 games, 50.0% win rate). The full breakdown of 1,295 games with White is in the table above.
What openings does Mihnea Costachi play as Black?
As Black, Mihnea Costachi most often plays: Ruy Lopez: Steinitz Defense Deferred (77 games, 49.4% win rate); Slav Defense (69 games, 39.1% win rate); King's Indian Defense (67 games, 55.2% win rate). See the table above for the top ten Black openings across 1,264 games.
What is Mihnea Costachi's FIDE rating?
Mihnea Costachi is currently rated 2,459 in classical chess, 2,381 in rapid and 2,482 in blitz. Peak classical rating: 2,484 (Nov 2018).
How many games has Mihnea Costachi played?
Our database contains 2,559 games by Mihnea Costachi, covering Jul 2008 to Aug 2026. Overall record: 1,351 wins, 510 draws, 698 losses (52.8% win rate).
How do I prepare against Mihnea Costachi?
2,559 games by Mihnea Costachi 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.