Prepare against Tero Piiroinen
Finland · World #42,581 classical · FIDE ID 507539
When preparing against Tero Piiroinen, expect 1.d4 in 79% of White games. Against 1.e4 the reply is 1...c6 (66% of games); against 1.d4, 1...f5 (50%).
Our database contains 115 games by Tero Piiroinen, covering Sep 2010 to Aug 2026. Below you'll find Tero Piiroinen's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Tero Piiroinen 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 | 1,923 | 1,923 | Aug 2026 |
| Rapid | 1,886 | 1,886 | Aug 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 115 | 32 | 40 | 43 | 27.8% |
| As White | 57 | 17 | 17 | 23 | 29.8% |
| As Black | 58 | 15 | 23 | 20 | 25.9% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Tero Piiroinen's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Tero Piiroinen's side.
First moves as White (57 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 45 | 78.9% | 42.2% |
| b3 | 7 | 12.3% | 57.1% |
| Nf3 | 3 | 5.3% | 66.7% |
| c4 | 1 | 1.8% | 50.0% |
| f4 | 1 | 1.8% | 0.0% |
Main lines as White
- 1.d4 — 79% of White games, 42.2% score
- …Nf6 (58% of these games) — Piiroinen usually continues Nf3 (50.0% score)
- …d5 (27% of these games) — Piiroinen usually continues c4 (66.7% score)
- …d6 (4% of these games) — Piiroinen usually continues Nc3 (50.0% score)
- 1.b3 — 12% of White games, 57.1% score
- …e5 (43% of these games) — Piiroinen usually continues Bb2 (50.0% score)
- …d5 (29% of these games) — Piiroinen usually continues Bb2 (75.0% score)
- …e6 (14% of these games) — Piiroinen usually continues Bb2 (100.0% score)
As Black against 1.e4 (32 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c6 | 21 | 65.6% | 50.0% |
| c5 | 5 | 15.6% | 60.0% |
| g6 | 5 | 15.6% | 30.0% |
| d6 | 1 | 3.1% | 0.0% |
As Black against 1.d4 (16 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| f5 | 8 | 50.0% | 43.8% |
| Nf6 | 4 | 25.0% | 50.0% |
| e6 | 2 | 12.5% | 50.0% |
| d6 | 1 | 6.3% | 0.0% |
| g6 | 1 | 6.3% | 0.0% |
Tero Piiroinen's chess games
All 115 games by Tero Piiroinen in the Chess.ceo database (Sep 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: 32 wins, 40 draws, 43 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D11 | Queen's Pawn Game | 9 | 3/3/3 | 33.3% |
| E94 | King's Indian Defense: Orthodox Variation | 9 | 2/2/5 | 22.2% |
| A01 | Nimzovich-Larsen attack | 7 | 3/2/2 | 42.9% |
| D35 | Indian Defense | 5 | 2/1/2 | 40.0% |
| D85 | Grünfeld Defense | 4 | 0/3/1 | 0.0% |
| A58 | Benoni Defense | 4 | 2/1/1 | 50.0% |
| D36 | Semi-Slav Defense | 2 | 0/0/2 | 0.0% |
| D03 | Torre Attack | 2 | 1/0/1 | 50.0% |
| A45 | Canard Opening | 2 | 1/1/0 | 50.0% |
| A46 | Horwitz Defense | 1 | 0/0/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A83 | Dutch Defense | 8 | 2/3/3 | 25.0% |
| B14 | Caro-Kann: Exchange Variation | 8 | 2/4/2 | 25.0% |
| A05 | Caro-Kann | 5 | 2/2/1 | 40.0% |
| A34 | Sicilian | 4 | 0/4/0 | 0.0% |
| B06 | Modern Defense | 4 | 1/0/3 | 25.0% |
| B15 | Caro-Kann: Main Line | 3 | 1/1/1 | 33.3% |
| B18 | Caro-Kann: Classical | 2 | 1/1/0 | 50.0% |
| E94 | King's Indian Defense: Orthodox Variation | 2 | 1/0/1 | 50.0% |
| B12 | Caro-Kann: Fantasy Variation | 2 | 0/0/2 | 0.0% |
| A10 | English Opening: Dutch Defense | 2 | 1/0/1 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Nov 2011 | Tapio Lauronen | 2,122 | Turku We TuTS Open | B13 |
| Jul 2012 | Jarmo Hautaniemi | 2,067 | Naantali Open | E94 |
| Nov 2011 | Antti Heikkila | 2,034 | Turku We TuTS Open | D05 |
| Jul 2023 | Eero Marjusaari | 2,007 | 31st Heart of Finland Open | B23 |
| Jan 2016 | Akseli Hosia | 1,916 | chT-FIN Gp1 1516 | E12 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Naantali Open | 2015 | 24 | 11.5 | 1,858 |
| ch-FIN Open | 2013 | 18 | 9 | 1,919 |
| Turku We TuTS Open | 2017 | 14 | 7 | 1,944 |
| Naantali Avoin Open | 2018 | 14 | 6.5 | 1,868 |
| ch-FIN U18 | 1991 | 9 | 1 | 1,818 |
| chT1-FIN West 1314 | 2014 | 7 | 3 | 1,908 |
| chT-FIN Gp3 1718 | 2018 | 5 | 2.5 | 1,880 |
| chT-FIN Gp2 | 2023 | 5 | 3 | 1,896 |
Interactive opening tree from all 115 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Tero Piiroinen's chess games?
115 games by Tero Piiroinen, from Sep 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 Tero Piiroinen has played.
What does Tero Piiroinen play on the first move as White?
Across 57 games with White in our database, Tero Piiroinen opens with 1.d4 (79% of games), 1.b3 (12% of games), 1.Nf3 (5% of games). Against 1.e4 as Black, Tero Piiroinen answers 1...c6 (66% of games), 1...c5 (16% of games), 1...g6 (16% of games). Against 1.d4: 1...f5 (50% of games), 1...Nf6 (25% of games), 1...e6 (13% of games).
What openings does Tero Piiroinen play as White?
As White, Tero Piiroinen's most-played openings in our database are: Queen's Pawn Game (9 games, 33.3% win rate); King's Indian Defense: Orthodox Variation (9 games, 22.2% win rate); Nimzovich-Larsen attack (7 games, 42.9% win rate). The full breakdown of 57 games with White is in the table above.
What openings does Tero Piiroinen play as Black?
As Black, Tero Piiroinen most often plays: Dutch Defense (8 games, 25.0% win rate); Caro-Kann: Exchange Variation (8 games, 25.0% win rate); Caro-Kann (5 games, 40.0% win rate). See the table above for the top ten Black openings across 58 games.
What is Tero Piiroinen's FIDE rating?
Tero Piiroinen is currently rated 1,923 in classical chess, 1,886 in rapid. Peak classical rating: 1,923 (Aug 2026).
How many games has Tero Piiroinen played?
Our database contains 115 games by Tero Piiroinen, covering Sep 2010 to Aug 2026. Overall record: 32 wins, 40 draws, 43 losses (27.8% win rate).
How do I prepare against Tero Piiroinen?
115 games by Tero Piiroinen 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.