Prepare against Sergio Harnandan
NLD · World #39,109 classical · FIDE ID 1029169
When preparing against Sergio Harnandan, expect 1.d4 in 86% of White games. Against 1.e4 the reply is 1...c5 (62% of games); against 1.d4, 1...Nf6 (86%).
Our database contains 86 games by Sergio Harnandan, covering Nov 2010 to Jul 2026. Below you'll find Sergio Harnandan's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Sergio Harnandan 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 | 1,939 | 2,007 | Sep 2011 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 86 | 29 | 20 | 37 | 33.7% |
| As White | 42 | 12 | 8 | 22 | 28.6% |
| As Black | 44 | 17 | 12 | 15 | 38.6% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Sergio Harnandan's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Sergio Harnandan's side.
First moves as White (42 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d4 | 36 | 85.7% | 36.1% |
| e4 | 5 | 11.9% | 60.0% |
| Nc3 | 1 | 2.4% | 0.0% |
Main lines as White
- 1.d4 — 86% of White games, 36.1% score
- …d5 (47% of these games) — Harnandan usually continues e4 (16.7% score)
- …Nf6 (39% of these games) — Harnandan usually continues c4 (44.4% score)
- …d6 (6% of these games) — Harnandan usually continues e4 (50.0% score)
- 1.e4 — 12% of White games, 60.0% score
- …e5 (40% of these games) — Harnandan usually continues Nf3 (50.0% score)
- …e6 (20% of these games) — Harnandan usually continues d4 (0.0% score)
- …Nf6 (20% of these games) — Harnandan usually continues e5 (100.0% score)
As Black against 1.e4 (26 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 16 | 61.5% | 53.1% |
| c6 | 7 | 26.9% | 57.1% |
| e5 | 2 | 7.7% | 25.0% |
| d5 | 1 | 3.8% | 0.0% |
As Black against 1.d4 (7 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| Nf6 | 6 | 85.7% | 66.7% |
| d5 | 1 | 14.3% | 100.0% |
Sergio Harnandan's chess games
All 86 games by Sergio Harnandan in the Chess.ceo database (Nov 2010 - 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: 29 wins, 20 draws, 37 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| D00 | Blackmar-Diemer Gambit | 10 | 2/0/8 | 20.0% |
| B09 | Queen's Pawn Game | 4 | 1/2/1 | 25.0% |
| A65 | Indian Defense | 3 | 2/0/1 | 66.7% |
| D00 | Queen's Pawn Game: Chigorin Variation | 2 | 0/1/1 | 0.0% |
| D20 | Queen's Gambit Accepted | 2 | 1/0/1 | 50.0% |
| C02 | French: Advance Variation | 2 | 0/1/1 | 0.0% |
| A44 | Benoni Defense | 2 | 0/0/2 | 0.0% |
| E24 | Nimzo-Indian: Sämisch Variation | 2 | 2/0/0 | 100.0% |
| B06 | Pirc Defense | 2 | 1/0/1 | 50.0% |
| D16 | Slav Defense | 2 | 0/0/2 | 0.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B30 | Sicilian | 6 | 4/1/1 | 66.7% |
| B19 | Caro-Kann: Classical | 5 | 3/1/1 | 60.0% |
| B33 | Sicilian: Sveshnikov | 3 | 2/0/1 | 66.7% |
| D12 | Slav Defense | 3 | 0/2/1 | 0.0% |
| D01 | Indian Defense | 3 | 0/2/1 | 0.0% |
| B31 | Sicilian: Rossolimo | 2 | 0/0/2 | 0.0% |
| A39 | English Opening | 2 | 0/0/2 | 0.0% |
| B22 | Sicilian: Alapin | 2 | 0/2/0 | 0.0% |
| A48 | London System | 2 | 2/0/0 | 100.0% |
| B23 | Sicilian: Closed | 2 | 1/0/1 | 50.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Aug 2010 | Milorad Vulin | 2,079 | 12th IBCA Wch Blind | B33 |
| Aug 2010 | Vladan Petrovic | 2,049 | 12th IBCA Wch Blind | B32 |
| Sep 2010 | Udupa Krishna | 2,015 | 12th IBCA Wch Blind | D00 |
| Jun 2012 | Jerzy Cebula | 1,993 | 39th Utrecht OKU Open | A58 |
| Oct 2008 | Gerasim Mynzat | 1,918 | 13th IBCA-ol blind | B19 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| 12th IBCA Wch Blind | 2010 | 9 | 4 | 2,012 |
| 13th IBCA Wch Blind | 2014 | 9 | 4.5 | 1,962 |
| 5th IBCA ch-EU blind | 2011 | 9 | 4.5 | 2,000 |
| 13th IBCA-ol blind | 2008 | 9 | 5.5 | 1,752 |
| 4th IBCA Wch U20 Blind | 2005 | 9 | 4.5 | 1,975 |
| 15th IBCA Olympiad | 2017 | 8 | 5 | 1,951 |
| 1st IBCA chT-EU blind | 2016 | 8 | 2 | 1,730 |
| 14th IBCA-ol blind | 2012 | 7 | 2 | 1,762 |
Interactive opening tree from all 86 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Sergio Harnandan's chess games?
86 games by Sergio Harnandan, from Nov 2010 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 Sergio Harnandan has played.
What does Sergio Harnandan play on the first move as White?
Across 42 games with White in our database, Sergio Harnandan opens with 1.d4 (86% of games), 1.e4 (12% of games), 1.Nc3 (2% of games). Against 1.e4 as Black, Sergio Harnandan answers 1...c5 (62% of games), 1...c6 (27% of games), 1...e5 (8% of games). Against 1.d4: 1...Nf6 (86% of games), 1...d5 (14% of games).
What openings does Sergio Harnandan play as White?
As White, Sergio Harnandan's most-played openings in our database are: Blackmar-Diemer Gambit (10 games, 20.0% win rate); Queen's Pawn Game (4 games, 25.0% win rate); Indian Defense (3 games, 66.7% win rate). The full breakdown of 42 games with White is in the table above.
What openings does Sergio Harnandan play as Black?
As Black, Sergio Harnandan most often plays: Sicilian (6 games, 66.7% win rate); Caro-Kann: Classical (5 games, 60.0% win rate); Sicilian: Sveshnikov (3 games, 66.7% win rate). See the table above for the top ten Black openings across 44 games.
What is Sergio Harnandan's FIDE rating?
Sergio Harnandan is currently rated 1,939 in classical chess. Peak classical rating: 2,007 (Sep 2011).
How many games has Sergio Harnandan played?
Our database contains 86 games by Sergio Harnandan, covering Nov 2010 to Jul 2026. Overall record: 29 wins, 20 draws, 37 losses (33.7% win rate).
How do I prepare against Sergio Harnandan?
86 games by Sergio Harnandan 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.