Prepare against Katrin Osk Tomasdottir
Iceland · World #131,475 classical · FIDE ID 2331560
When preparing against Katrin Osk Tomasdottir, expect 1.d4 in 100% of White games. Against 1.e4 the reply is 1...c5 (100% of games); against 1.d4, 1...d5 (100%).
Our database contains 42 games by Katrin Osk Tomasdottir, covering Jun 2024 to Nov 2026. Below you'll find Katrin Osk Tomasdottir's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Katrin Osk Tomasdottir 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 | 1,646 | 1,646 | Nov 2026 |
| Rapid | 1,597 | 1,687 | Mar 2026 |
| Blitz | 1,604 | 1,693 | Sep 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 42 | 16 | 3 | 23 | 38.1% |
| As White | 22 | 8 | 1 | 13 | 36.4% |
| As Black | 20 | 8 | 2 | 10 | 40.0% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Katrin Osk Tomasdottir's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Katrin Osk Tomasdottir's side.
First moves as White (22 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 22 | 100.0% | 38.6% |
Main lines as White
- 1.d4 — 100% of White games, 38.6% score
- …d5 (64% of these games) — Tomasdottir usually continues c4 (39.3% score)
- …Nf6 (36% of these games) — Tomasdottir usually continues c4 (37.5% score)
As Black against 1.e4 (12 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 12 | 100.0% | 58.3% |
As Black against 1.d4 (6 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 6 | 100.0% | 33.3% |
Katrin Osk Tomasdottir's chess games
All 42 games by Katrin Osk Tomasdottir in the Chess.ceo database (Jun 2024 - Nov 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: 16 wins, 3 draws, 23 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D31 | Semi-Slav Defense | 4 | 3/0/1 | 75.0% |
| D10 | Slav Defense | 3 | 2/0/1 | 66.7% |
| D37 | Indian Defense | 3 | 0/0/3 | 0.0% |
| E20 | Nimzo-Indian Defense | 3 | 1/0/2 | 33.3% |
| E61 | King's Indian Defense | 2 | 0/0/2 | 0.0% |
| D20 | Queen's Gambit Accepted | 2 | 0/0/2 | 0.0% |
| E12 | Queen's Indian Defense | 1 | 1/0/0 | 100.0% |
| A32 | English Opening | 1 | 1/0/0 | 100.0% |
| A59 | Benoni Defense | 1 | 0/0/1 | 0.0% |
| D51 | Queen's Gambit Declined | 1 | 0/1/0 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B40 | Sicilian | 5 | 2/0/3 | 40.0% |
| B23 | Sicilian: Closed | 4 | 3/0/1 | 75.0% |
| A11 | English Opening: Slav Setup | 1 | 0/0/1 | 0.0% |
| D02 | London System | 1 | 0/0/1 | 0.0% |
| D02 | Queen's Pawn Game | 1 | 0/0/1 | 0.0% |
| D01 | Queen's Pawn Game: Chigorin Variation | 1 | 1/0/0 | 100.0% |
| D43 | Semi-Slav Defense | 1 | 0/1/0 | 0.0% |
| B22 | Sicilian: Alapin | 1 | 1/0/0 | 100.0% |
| B21 | Sicilian: Grand Prix Attack | 1 | 1/0/0 | 100.0% |
| B20 | Sicilian: Snyder Variation | 1 | 0/0/1 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Apr 2025 | Tim Pearce | 1,762 | Reykjavik Open | D52 |
| Apr 2025 | Micah K Jameson | 1,726 | Reykjavik Open | E21 |
| May 2026 | Nokkvi Mar Valsson | 1,579 | Landsmótið í skólaskák 2026 | A32 |
| Apr 2026 | Sara Ostafiev | 1,561 | Nordic girls chess championship 2026 | C (born 2013 & later) | — |
| Apr 2026 | Miroslava Skibina | 1,443 | Nordic girls chess championship 2026 - Group C | D31 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| Reykjavik Open 2026 | 2026 | 9 | 3 | 1,564 |
| Reykjavik Open | 2025 | 9 | 3 | 1,663 |
| 12th ChessMates Int | 2025 | 5 | 0.5 | 1,311 |
| Landsmótið í skólaskák 2026 | 2026 | 5 | 2.5 | 1,707 |
| Íslandsmót kvenna 2026 | 2026 | 5 | 4 | 1,704 |
| Nordic girls chess championship 2026 - Group C | 2026 | 5 | 2.5 | 1,606 |
| Nordic girls chess championship 2026 | C (born 2013 & later) | 2026 | 2 | 2 | 1,902 |
| U2000 mót TR 2026 | 2026 | 1 | 0 | 1,454 |
Interactive opening tree from all 42 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Katrin Osk Tomasdottir's chess games?
42 games by Katrin Osk Tomasdottir, from Jun 2024 to Nov 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 Katrin Osk Tomasdottir has played.
What does Katrin Osk Tomasdottir play on the first move as White?
Across 22 games with White in our database, Katrin Osk Tomasdottir opens with 1.d4 (100% of games). Against 1.e4 as Black, Katrin Osk Tomasdottir answers 1...c5 (100% of games). Against 1.d4: 1...d5 (100% of games).
What openings does Katrin Osk Tomasdottir play as White?
As White, Katrin Osk Tomasdottir's most-played openings in our database are: Semi-Slav Defense (4 games, 75.0% win rate); Slav Defense (3 games, 66.7% win rate); Indian Defense (3 games, 0.0% win rate). The full breakdown of 22 games with White is in the table above.
What openings does Katrin Osk Tomasdottir play as Black?
As Black, Katrin Osk Tomasdottir most often plays: Sicilian (5 games, 40.0% win rate); Sicilian: Closed (4 games, 75.0% win rate); English Opening: Slav Setup (1 games, 0.0% win rate). See the table above for the top ten Black openings across 20 games.
What is Katrin Osk Tomasdottir's FIDE rating?
Katrin Osk Tomasdottir is currently rated 1,646 in classical chess, 1,597 in rapid and 1,604 in blitz. Peak classical rating: 1,646 (Nov 2026).
How many games has Katrin Osk Tomasdottir played?
Our database contains 42 games by Katrin Osk Tomasdottir, covering Jun 2024 to Nov 2026. Overall record: 16 wins, 3 draws, 23 losses (38.1% win rate).
How do I prepare against Katrin Osk Tomasdottir?
42 games by Katrin Osk Tomasdottir 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.