Prepare against Pekka Koski
Finland · World #60,700 classical · FIDE ID 503487
When preparing against Pekka Koski, expect 1.d4 in 100% of White games. Against 1.e4 the reply is 1...e5 (97% of games); against 1.d4, 1...Nf6 (76%).
Our database contains 111 games by Pekka Koski, covering Feb 2017 to Jul 2026. Below you'll find Pekka Koski's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Pekka Koski 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 | 1,853 | 1,859 | Feb 2017 |
| Rapid | 1,822 | 1,856 | Sep 2024 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 111 | 46 | 24 | 41 | 41.4% |
| As White | 55 | 30 | 9 | 16 | 54.5% |
| As Black | 56 | 16 | 15 | 25 | 28.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Pekka Koski's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Pekka Koski's side.
First moves as White (55 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 55 | 100.0% | 62.7% |
Main lines as White
- 1.d4 — 100% of White games, 62.7% score
- …Nf6 (51% of these games) — Koski usually continues c4 (51.8% score)
- …d5 (33% of these games) — Koski usually continues c4 (77.8% score)
- …e6 (11% of these games) — Koski usually continues c4 (75.0% score)
As Black against 1.e4 (30 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e5 | 29 | 96.7% | 43.1% |
| d5 | 1 | 3.3% | 0.0% |
As Black against 1.d4 (17 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 13 | 76.5% | 50.0% |
| d5 | 4 | 23.5% | 25.0% |
Pekka Koski's chess games
All 111 games by Pekka Koski in the Chess.ceo database (Feb 2017 - Jul 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: 46 wins, 24 draws, 41 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| E83 | King's Indian: Sämisch | 8 | 5/1/2 | 62.5% |
| D55 | Queen's Gambit Declined | 7 | 6/1/0 | 85.7% |
| A57 | Benoni Defense | 6 | 1/1/4 | 16.7% |
| E34 | Nimzo-Indian: Classical Variation | 5 | 1/1/3 | 20.0% |
| D35 | Semi-Slav Defense | 3 | 2/1/0 | 66.7% |
| A83 | Dutch Defense | 3 | 2/0/1 | 66.7% |
| D80 | Grünfeld Defense | 3 | 1/0/2 | 33.3% |
| D08 | Albin Countergambit | 3 | 1/1/1 | 33.3% |
| D13 | Slav Defense | 2 | 1/1/0 | 50.0% |
| A80 | Horwitz Defense | 2 | 0/1/1 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C56 | Italian Game | 6 | 3/1/2 | 50.0% |
| E90 | Indian Defense | 6 | 2/2/2 | 33.3% |
| C45 | Scotch Game | 5 | 1/2/2 | 20.0% |
| A29 | English Opening: Reverse Sicilian | 3 | 1/0/2 | 33.3% |
| E04 | Catalan | 3 | 0/1/2 | 0.0% |
| D13 | Slav Defense | 3 | 0/1/2 | 0.0% |
| C47 | Four Knights Game: Scotch Variation | 2 | 0/0/2 | 0.0% |
| A45 | London System | 2 | 2/0/0 | 100.0% |
| C42 | Petrov's Defense | 2 | 0/2/0 | 0.0% |
| A16 | English Opening | 2 | 0/1/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 1998 | Teemu Kilpi | 2,170 | Oulu We Sh 77 Open | D31 |
| Feb 2004 | Sauli Pyylampi | 2,091 | chT-FIN 1C 0304 | E20 |
| Jan 2010 | Pekka Sassi | 2,080 | Oulu We Sh 77 Open | D37 |
| Feb 2005 | Kalevi Lehtosaari | 2,050 | Oulu We Sh 77 Open | A29 |
| Feb 2006 | Derik Lardot | 2,045 | Oulu We Sh 77 Open | C47 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Oulu We Sh 77 Open | 2010 | 27 | 15 | 2,078 |
| Kajaani We KaSY Open | 2009 | 10 | 6.5 | 2,190 |
| Kokkola Open | 2000 | 8 | 4.5 | 2,255 |
| Oulu We OSS | 1997 | 7 | 4 | 2,354 |
| chT1C-FIN 0203 | 2003 | 6 | 5 | – |
| chT-FIN Gp4 1718 | 2017 | 5 | 2 | 1,800 |
| ch-FIN North | 1998 | 5 | 1.5 | – |
| chT-FIN 1C 0405 | 2005 | 5 | 1.5 | 1,935 |
Interactive opening tree from all 111 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Pekka Koski's chess games?
111 games by Pekka Koski, from Feb 2017 to Jul 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 Pekka Koski has played.
What does Pekka Koski play on the first move as White?
Across 55 games with White in our database, Pekka Koski opens with 1.d4 (100% of games). Against 1.e4 as Black, Pekka Koski answers 1...e5 (97% of games), 1...d5 (3% of games). Against 1.d4: 1...Nf6 (76% of games), 1...d5 (24% of games).
What openings does Pekka Koski play as White?
As White, Pekka Koski's most-played openings in our database are: King's Indian: Sämisch (8 games, 62.5% win rate); Queen's Gambit Declined (7 games, 85.7% win rate); Benoni Defense (6 games, 16.7% win rate). The full breakdown of 55 games with White is in the table above.
What openings does Pekka Koski play as Black?
As Black, Pekka Koski most often plays: Italian Game (6 games, 50.0% win rate); Indian Defense (6 games, 33.3% win rate); Scotch Game (5 games, 20.0% win rate). See the table above for the top ten Black openings across 56 games.
What is Pekka Koski's FIDE rating?
Pekka Koski is currently rated 1,853 in classical chess, 1,822 in rapid. Peak classical rating: 1,859 (Feb 2017).
How many games has Pekka Koski played?
Our database contains 111 games by Pekka Koski, covering Feb 2017 to Jul 2026. Overall record: 46 wins, 24 draws, 41 losses (41.4% win rate).
How do I prepare against Pekka Koski?
111 games by Pekka Koski 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.