Prepare against Oscar Ferreira Isasi
FM · PRY · World #10,805 classical · FIDE ID 3700135
When preparing against Oscar Ferreira Isasi, expect 1.Nf3 in 40% of White games. Against 1.e4 the reply is 1...c5 (68% of games); against 1.d4, 1...Nf6 (94%).
Our database contains 118 games by Oscar Ferreira Isasi, covering Jan 1977 to Oct 2026. Below you'll find Oscar Ferreira Isasi's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Oscar Ferreira Isasi 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 | 2,158 | 2,300 | Jan 1993 |
| Rapid | 2,158 | 2,247 | Jan 2017 |
| Blitz | 2,101 | 2,247 | Nov 2012 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 118 | 43 | 39 | 36 | 36.4% |
| As White | 63 | 26 | 22 | 15 | 41.3% |
| As Black | 55 | 17 | 17 | 21 | 30.9% |
FIDE rated record
From FIDE's official rated-game ledger (2006-2026): 184 rated games against 110 different opponents, across 26 events in 1 countries. These counts cover FIDE-rated play only, so they differ from the database totals above.
By time control
| Format | Games | W | D | L | Win rate | Avg opp | Perf | Unbeaten |
|---|---|---|---|---|---|---|---|---|
| Classical | 78 | 29 | 37 | 12 | 37.2% | 2,086 | 2,175 | 13 |
| Rapid | 41 | 23 | 13 | 5 | 56.1% | 1,862 | 2,026 | 13 |
| Blitz | 65 | 34 | 14 | 17 | 52.3% | 1,901 | 1,996 | 9 |
Against the field
| Opposition | Games | W | D | L | Win rate |
|---|---|---|---|---|---|
| Against higher-rated | 23 | 4 | 11 | 8 | 17.4% |
| Against lower-rated | 155 | 78 | 51 | 26 | 50.3% |
Wins over titled players: 1 vs IM · 8 vs FM · 5 vs CM · 2 vs WFM.
Tournament wins
2 tournament wins from 26 events.
Year by year
| Year | Games | W | D | L | Avg opp | Perf |
|---|---|---|---|---|---|---|
| 2026 | 16 | 8 | 4 | 4 | 1,819 | 1,899 |
| 2025 | 34 | 15 | 14 | 5 | 1,853 | 1,962 |
| 2024 | 24 | 14 | 6 | 4 | 1,925 | 2,082 |
| 2021 | 8 | 2 | 4 | 2 | 1,693 | 1,693 |
| 2018 | 9 | 5 | 3 | 1 | 1,819 | 1,997 |
| 2016 | 16 | 10 | 2 | 4 | 2,035 | 2,168 |
| 2012 | 22 | 11 | 5 | 6 | 1,970 | 2,061 |
| 2011 | 9 | 1 | 7 | 1 | 2,066 | 2,066 |
| 2010 | 9 | 3 | 3 | 3 | 2,303 | 2,303 |
| 2008 | 11 | 5 | 4 | 2 | 2,119 | 2,239 |
| 2007 | 15 | 7 | 7 | 1 | 2,175 | 2,335 |
| 2006 | 11 | 5 | 5 | 1 | 2,126 | 2,272 |
Move-by-move preparation stats
Straight from the preparation tree built over all of Oscar Ferreira Isasi's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Oscar Ferreira Isasi's side.
First moves as White (63 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf3 | 25 | 39.7% | 62.0% |
| d4 | 21 | 33.3% | 61.9% |
| c4 | 10 | 15.9% | 60.0% |
| e4 | 7 | 11.1% | 35.7% |
Main lines as White
- 1.Nf3 — 40% of White games, 62.0% score
- …Nf6 (52% of these games) — Isasi usually continues c4 (81.3% score)
- …d5 (24% of these games) — Isasi usually continues d4 (50.0% score)
- …c5 (8% of these games) — Isasi usually continues c4 (0.0% score)
- 1.d4 — 33% of White games, 61.9% score
- …Nf6 (57% of these games) — Isasi usually continues c4 (71.4% score)
- …d5 (33% of these games) — Isasi usually continues Nf3 (50.0% score)
- …f5 (5% of these games) — Isasi usually continues Nf3 (100.0% score)
As Black against 1.e4 (28 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 19 | 67.9% | 50.0% |
| d6 | 4 | 14.3% | 75.0% |
| d5 | 2 | 7.1% | 75.0% |
| e5 | 2 | 7.1% | 25.0% |
| c6 | 1 | 3.6% | 0.0% |
As Black against 1.d4 (18 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 17 | 94.4% | 38.2% |
| g6 | 1 | 5.6% | 50.0% |
Oscar Ferreira Isasi's chess games
All 118 games by Oscar Ferreira Isasi in the Chess.ceo database (Jan 1977 - Oct 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: 43 wins, 39 draws, 36 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D12 | Queen's Pawn Game | 7 | 2/3/2 | 28.6% |
| D13 | Slav Defense | 6 | 2/4/0 | 33.3% |
| A46 | Indian Defense | 5 | 3/1/1 | 60.0% |
| A14 | English Opening | 4 | 3/1/0 | 75.0% |
| E90 | King's Indian Defense: Orthodox Variation | 4 | 2/1/1 | 50.0% |
| D34 | Queen's Gambit Declined | 3 | 0/2/1 | 0.0% |
| D80 | Grünfeld Defense | 3 | 3/0/0 | 100.0% |
| A32 | Benoni Defense | 3 | 2/1/0 | 66.7% |
| A30 | English Opening: Symmetrical | 2 | 1/0/1 | 50.0% |
| A25 | English Opening: Reverse Sicilian | 2 | 0/0/2 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B40 | Sicilian | 11 | 3/6/2 | 27.3% |
| A56 | Benoni Defense | 6 | 3/0/3 | 50.0% |
| A55 | Indian Defense | 5 | 1/2/2 | 20.0% |
| D40 | English Opening | 3 | 0/1/2 | 0.0% |
| B50 | Pirc Defense | 3 | 2/0/1 | 66.7% |
| E76 | King's Indian Defense: Four Pawns Attack | 2 | 1/0/1 | 50.0% |
| B90 | Sicilian: Najdorf | 2 | 1/0/1 | 50.0% |
| A29 | English Opening: Reverse Sicilian | 1 | 1/0/0 | 100.0% |
| B16 | Caro-Kann: Main Line | 1 | 0/0/1 | 0.0% |
| E63 | King's Indian Defense | 1 | 1/0/0 | 100.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jan 1991 | Jaime Sunye Neto | 2,475 | Mexico City Open | B87 |
| Jul 2002 | Jorge H. Gomez Baillo | 2,450 | San Cristobal Open | B85 |
| May 2010 | Manuel Larrea | 2,347 | 3rd Asuncion Roggio Cup B | E76 |
| May 2010 | Luismar Brito | 2,343 | 3rd Asuncion Roggio Cup B | A43 |
| Jun 1998 | Carlos Gamarra Caceres | 2,335 | ch-PAR Mayor | A89 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| ch-PAR | 2011 | 20 | 11.5 | 2,153 |
| ch-PAR Mayor | 2012 | 13 | 7.5 | 2,226 |
| 22nd Olympiad | 1976 | 12 | 6 | 2,279 |
| Asuncion Mayor Open | 2001 | 10 | 6.5 | 2,363 |
| Olympiad-36 | 2004 | 10 | 4 | 2,175 |
| 3rd Asuncion Roggio Cup B | 2010 | 9 | 4.5 | 2,302 |
| Olympiad-34 | 2000 | 9 | 3.5 | 2,223 |
| San Cristobal Open | 2002 | 7 | 6.5 | 2,654 |
Interactive opening tree from all 118 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Oscar Ferreira Isasi's chess games?
118 games by Oscar Ferreira Isasi, from Jan 1977 to Oct 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 Ferreira Isasi has played.
What does Oscar Ferreira Isasi play on the first move as White?
Across 63 games with White in our database, Oscar Ferreira Isasi opens with 1.Nf3 (40% of games), 1.d4 (33% of games), 1.c4 (16% of games). Against 1.e4 as Black, Oscar Ferreira Isasi answers 1...c5 (68% of games), 1...d6 (14% of games), 1...d5 (7% of games). Against 1.d4: 1...Nf6 (94% of games), 1...g6 (6% of games).
What openings does Oscar Ferreira Isasi play as White?
As White, Oscar Ferreira Isasi's most-played openings in our database are: Queen's Pawn Game (7 games, 28.6% win rate); Slav Defense (6 games, 33.3% win rate); Indian Defense (5 games, 60.0% win rate). The full breakdown of 63 games with White is in the table above.
What openings does Oscar Ferreira Isasi play as Black?
As Black, Oscar Ferreira Isasi most often plays: Sicilian (11 games, 27.3% win rate); Benoni Defense (6 games, 50.0% win rate); Indian Defense (5 games, 20.0% win rate). See the table above for the top ten Black openings across 55 games.
What is Oscar Ferreira Isasi's FIDE rating?
Oscar Ferreira Isasi is currently rated 2,158 in classical chess, 2,158 in rapid and 2,101 in blitz. Peak classical rating: 2,300 (Jan 1993).
How many games has Oscar Ferreira Isasi played?
Our database contains 118 games by Oscar Ferreira Isasi, covering Jan 1977 to Oct 2026. Overall record: 43 wins, 39 draws, 36 losses (36.4% win rate).
How do I prepare against Oscar Ferreira Isasi?
118 games by Oscar Ferreira Isasi 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.