Prepare against Zorko Kostanjsek
CM · HRV · World #18,564 classical · FIDE ID 14503123
When preparing against Zorko Kostanjsek, expect 1.c4 in 43% of White games. Against 1.e4 the reply is 1...d6 (46% of games); against 1.d4, 1...d6 (48%). Lowest win rate among frequent openings: Philidor as Black, 16.7% over 18 games.
Our database contains 171 games by Zorko Kostanjsek, covering Apr 2003 to Jul 2026. Below you'll find Zorko Kostanjsek's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Zorko Kostanjsek 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 | 2,070 | 2,223 | Apr 2003 |
| Rapid | 2,026 | 2,188 | Dec 2013 |
| Blitz | 1,947 | 2,177 | Nov 2013 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 171 | 54 | 51 | 66 | 31.6% |
| As White | 80 | 30 | 24 | 26 | 37.5% |
| As Black | 91 | 24 | 27 | 40 | 26.4% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Zorko Kostanjsek's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Zorko Kostanjsek's side.
First moves as White (80 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c4 | 34 | 42.5% | 57.4% |
| Nf3 | 27 | 33.8% | 51.9% |
| e4 | 6 | 7.5% | 58.3% |
| d4 | 4 | 5.0% | 37.5% |
| e3 | 4 | 5.0% | 37.5% |
| g3 | 3 | 3.8% | 50.0% |
Main lines as White
- 1.c4 — 43% of White games, 57.4% score
- …e5 (32% of these games) — Kostanjsek usually continues Nc3 (54.5% score)
- …Nf6 (32% of these games) — Kostanjsek usually continues Nc3 (68.8% score)
- …e6 (15% of these games) — Kostanjsek usually continues g3 (83.3% score)
- 1.Nf3 — 34% of White games, 51.9% score
- …Nf6 (48% of these games) — Kostanjsek usually continues c4 (58.3% score)
- …d5 (33% of these games) — Kostanjsek usually continues c4 (62.5% score)
- …c5 (7% of these games) — Kostanjsek usually continues b3 (0.0% score)
As Black against 1.e4 (41 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d6 | 19 | 46.3% | 36.8% |
| e6 | 10 | 24.4% | 30.0% |
| e5 | 8 | 19.5% | 37.5% |
| c5 | 2 | 4.9% | 100.0% |
| c6 | 1 | 2.4% | 0.0% |
| Nc6 | 1 | 2.4% | 100.0% |
As Black against 1.d4 (33 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d6 | 16 | 48.5% | 53.1% |
| Nf6 | 7 | 21.2% | 35.7% |
| e6 | 6 | 18.2% | 16.7% |
| g6 | 3 | 9.1% | 16.7% |
| d5 | 1 | 3.0% | 50.0% |
Zorko Kostanjsek's chess games
All 171 games by Zorko Kostanjsek in the Chess.ceo database (Apr 2003 - 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: 54 wins, 51 draws, 66 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A28 | English Opening: Reverse Sicilian | 12 | 4/4/4 | 33.3% |
| A16 | English Opening | 11 | 4/5/2 | 36.4% |
| E91 | King's Indian Defense: Orthodox Variation | 7 | 3/4/0 | 42.9% |
| A13 | English Opening: Neo-Catalan | 5 | 3/1/1 | 60.0% |
| A04 | Réti Opening | 5 | 2/0/3 | 40.0% |
| B30 | Sicilian: Alapin | 3 | 2/1/0 | 66.7% |
| A31 | Modern Defense | 3 | 2/0/1 | 66.7% |
| A30 | English Opening: Symmetrical | 3 | 0/0/3 | 0.0% |
| A00 | Hungarian Opening | 3 | 1/1/1 | 33.3% |
| A03 | Van 't Kruijs Opening | 3 | 1/1/1 | 33.3% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| C41 | Philidor | 18 | 3/9/6 | 16.7% |
| A46 | Rat Defense | 12 | 6/3/3 | 50.0% |
| A36 | English Opening: Symmetrical | 6 | 2/2/2 | 33.3% |
| C05 | French: Tarrasch Variation | 4 | 1/0/3 | 25.0% |
| B07 | Pirc Defense | 4 | 0/0/4 | 0.0% |
| A42 | Modern Defense | 4 | 0/2/2 | 0.0% |
| C15 | French: Winawer Variation | 4 | 1/2/1 | 25.0% |
| A48 | Indian Defense | 4 | 1/1/2 | 25.0% |
| A21 | English Opening | 3 | 1/1/1 | 33.3% |
| A43 | Benoni Defense | 3 | 0/1/2 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Jun 2016 | Hrvoje Stevic | 2,610 | 1st Zagreb Hulak Memorial Open | B30 |
| Nov 2013 | Janez Barle | 2,356 | 23rd Wch Seniors | B30 |
| Jan 1992 | Denis Rosandic | 2,340 | chT-CRO | A00 |
| Nov 2008 | Kemal Osmanovic | 2,337 | Sisak | A48 |
| Jan 1993 | Damir Medak | 2,330 | chT-CRO | D38 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| chT-CRO | 1995 | 26 | 8.5 | 2,195 |
| chT2-CRO Center | 2015 | 25 | 12.5 | 2,154 |
| 11th ch-EU | 2010 | 11 | 4.5 | 2,192 |
| 23rd Wch Seniors | 2013 | 11 | 5.5 | 2,223 |
| 22nd chT2-CRO Center | 2013 | 10 | 6 | 2,218 |
| Sisak | 2008 | 9 | 3.5 | 2,222 |
| 15th Jacques Lemans Open | 1995 | 9 | 6 | 2,203 |
| 19th Bled Open | 1998 | 8 | 3 | 2,185 |
Interactive opening tree from all 171 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Zorko Kostanjsek's chess games?
171 games by Zorko Kostanjsek, from Apr 2003 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 Zorko Kostanjsek has played.
What does Zorko Kostanjsek play on the first move as White?
Across 80 games with White in our database, Zorko Kostanjsek opens with 1.c4 (43% of games), 1.Nf3 (34% of games), 1.e4 (8% of games). Against 1.e4 as Black, Zorko Kostanjsek answers 1...d6 (46% of games), 1...e6 (24% of games), 1...e5 (20% of games). Against 1.d4: 1...d6 (48% of games), 1...Nf6 (21% of games), 1...e6 (18% of games).
What openings does Zorko Kostanjsek play as White?
As White, Zorko Kostanjsek's most-played openings in our database are: English Opening: Reverse Sicilian (12 games, 33.3% win rate); English Opening (11 games, 36.4% win rate); King's Indian Defense: Orthodox Variation (7 games, 42.9% win rate). The full breakdown of 80 games with White is in the table above.
What openings does Zorko Kostanjsek play as Black?
As Black, Zorko Kostanjsek most often plays: Philidor (18 games, 16.7% win rate); Rat Defense (12 games, 50.0% win rate); English Opening: Symmetrical (6 games, 33.3% win rate). See the table above for the top ten Black openings across 91 games.
What is Zorko Kostanjsek's FIDE rating?
Zorko Kostanjsek is currently rated 2,070 in classical chess, 2,026 in rapid and 1,947 in blitz. Peak classical rating: 2,223 (Apr 2003).
How many games has Zorko Kostanjsek played?
Our database contains 171 games by Zorko Kostanjsek, covering Apr 2003 to Jul 2026. Overall record: 54 wins, 51 draws, 66 losses (31.6% win rate).
How do I prepare against Zorko Kostanjsek?
171 games by Zorko Kostanjsek 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.