Prepare against Oscar Diez Viera
Spain · World #35,433 classical · FIDE ID 22201882
When preparing against Oscar Diez Viera, expect 1.e4 in 87% of White games. Against 1.e4 the reply is 1...c5 (90% of games); against 1.d4, 1...d5 (67%).
Our database contains 81 games by Oscar Diez Viera, covering Oct 2006 to Jul 2026. Below you'll find Oscar Diez Viera's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Oscar Diez Viera 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 | 1,957 | 1,981 | Jul 2024 |
| Rapid | 1,876 | 1,876 | Jul 2026 |
| Blitz | 1,909 | 1,909 | Jul 2026 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 81 | 26 | 16 | 39 | 32.1% |
| As White | 46 | 15 | 6 | 25 | 32.6% |
| As Black | 35 | 11 | 10 | 14 | 31.4% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Oscar Diez Viera's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Oscar Diez Viera's side.
First moves as White (46 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| e4 | 40 | 87.0% | 38.8% |
| d4 | 4 | 8.7% | 50.0% |
| Nf3 | 1 | 2.2% | 0.0% |
| g3 | 1 | 2.2% | 50.0% |
Main lines as White
- 1.e4 — 87% of White games, 38.8% score
- …c5 (50% of these games) — Viera usually continues Nf3 (43.3% score)
- …e5 (20% of these games) — Viera usually continues Nf3 (62.5% score)
- …c6 (8% of these games) — Viera usually continues d4 (50.0% score)
- 1.d4 — 9% of White games, 50.0% score
- …Nf6 (50% of these games) — Viera usually continues Nc3 (0.0% score)
- …d5 (50% of these games) — Viera usually continues c4 (100.0% score)
As Black against 1.e4 (20 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 18 | 90.0% | 41.7% |
| e6 | 2 | 10.0% | 50.0% |
As Black against 1.d4 (9 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 6 | 66.7% | 33.3% |
| Nf6 | 3 | 33.3% | 66.7% |
Oscar Diez Viera's chess games
All 81 games by Oscar Diez Viera in the Chess.ceo database (Oct 2006 - 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: 26 wins, 16 draws, 39 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C44 | Ponziani Opening | 7 | 5/0/2 | 71.4% |
| B41 | Sicilian | 7 | 2/1/4 | 28.6% |
| B23 | Sicilian: Closed | 3 | 0/2/1 | 0.0% |
| B71 | Sicilian: Dragon | 3 | 2/0/1 | 66.7% |
| B33 | Sicilian: Sveshnikov | 3 | 1/0/2 | 33.3% |
| D15 | Slav Defense | 2 | 2/0/0 | 100.0% |
| B06 | Modern Defense | 2 | 0/0/2 | 0.0% |
| C01 | French: Exchange Variation | 1 | 0/0/1 | 0.0% |
| C02 | French: Advance Variation | 1 | 0/0/1 | 0.0% |
| B13 | Caro-Kann: Exchange Variation | 1 | 0/1/0 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B78 | Sicilian | 10 | 2/3/5 | 20.0% |
| A23 | English Opening: Reverse Sicilian | 4 | 1/1/2 | 25.0% |
| D46 | Slav Defense | 3 | 2/0/1 | 66.7% |
| B23 | Sicilian: Closed | 3 | 2/1/0 | 66.7% |
| D35 | Semi-Slav Defense | 2 | 0/0/2 | 0.0% |
| E04 | Catalan | 2 | 1/1/0 | 50.0% |
| B30 | Sicilian: Rossolimo | 2 | 0/0/2 | 0.0% |
| D20 | Queen's Gambit Accepted | 1 | 0/0/1 | 0.0% |
| A50 | English Opening | 1 | 1/0/0 | 100.0% |
| C07 | French: Tarrasch Variation | 1 | 0/1/0 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Oct 2014 | Antonio Segovia Sanchez | 2,030 | ch-Gipuzkoa | D46 |
| Apr 2007 | Gaspar Fosser | 2,028 | 30th San Sebastian Open | E04 |
| May 2007 | Egoitz Irure Crespo | 1,953 | San Sebastian Udaberriko Open | D18 |
| May 2007 | Haritz Garro Beraza | 1,918 | San Sebastian Udaberriko Open | B80 |
| Mar 2008 | Asier Etxagibel Larranaga | 1,868 | ch-Euskadi U16 | D47 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-Euskadi U16 | 2008 | 12 | 9 | 1,986 |
| 30th San Sebastian Open | 2007 | 9 | 4 | 1,930 |
| 2nd Zujar Villa Termal Blitz | 2020 | 7 | 4 | 1,952 |
| ch-ESP U16 | 2008 | 6 | 2 | 1,889 |
| San Sebastian Udaberriko Open | 2007 | 5 | 2.5 | 1,967 |
| 17th San Sebastian Open | 2007 | 4 | 0.5 | 1,823 |
| ch-Gipuzkoa | 2015 | 4 | 2.5 | 2,095 |
| 11th San Sebastian Primavera de Gros Open | 2015 | 4 | 1 | 1,639 |
Interactive opening tree from all 81 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Oscar Diez Viera's chess games?
81 games by Oscar Diez Viera, from Oct 2006 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 Oscar Diez Viera has played.
What does Oscar Diez Viera play on the first move as White?
Across 46 games with White in our database, Oscar Diez Viera opens with 1.e4 (87% of games), 1.d4 (9% of games), 1.Nf3 (2% of games). Against 1.e4 as Black, Oscar Diez Viera answers 1...c5 (90% of games), 1...e6 (10% of games). Against 1.d4: 1...d5 (67% of games), 1...Nf6 (33% of games).
What openings does Oscar Diez Viera play as White?
As White, Oscar Diez Viera's most-played openings in our database are: Ponziani Opening (7 games, 71.4% win rate); Sicilian (7 games, 28.6% win rate); Sicilian: Closed (3 games, 0.0% win rate). The full breakdown of 46 games with White is in the table above.
What openings does Oscar Diez Viera play as Black?
As Black, Oscar Diez Viera most often plays: Sicilian (10 games, 20.0% win rate); English Opening: Reverse Sicilian (4 games, 25.0% win rate); Slav Defense (3 games, 66.7% win rate). See the table above for the top ten Black openings across 35 games.
What is Oscar Diez Viera's FIDE rating?
Oscar Diez Viera is currently rated 1,957 in classical chess, 1,876 in rapid and 1,909 in blitz. Peak classical rating: 1,981 (Jul 2024).
How many games has Oscar Diez Viera played?
Our database contains 81 games by Oscar Diez Viera, covering Oct 2006 to Jul 2026. Overall record: 26 wins, 16 draws, 39 losses (32.1% win rate).
How do I prepare against Oscar Diez Viera?
81 games by Oscar Diez Viera 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.