Prepare against Mario Jr. Bertok
HRV · World #12,506 classical · FIDE ID 14581280
Our database contains 240 games by Mario Jr. Bertok, covering Jan 2019 to Jul 2026. Below you'll find Mario Jr. Bertok's most-played openings with White and Black, career performance record, notable wins and top events — everything you need to scout Mario Jr. Bertok 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 | 2,135 | 2,178 | Aug 2021 |
| Rapid | 2,128 | 2,172 | Aug 2020 |
| Blitz | 2,072 | 2,204 | Apr 2022 |
Performance record
| Split | Games | Wins | Draws | Losses | Win rate |
|---|---|---|---|---|---|
| Overall | 240 | 62 | 128 | 50 | 25.8% |
| As White | 123 | 39 | 65 | 19 | 31.7% |
| As Black | 117 | 23 | 63 | 31 | 19.7% |
Move-by-move preparation stats
Straight from the preparation tree built over all of Mario Jr. Bertok's games — the same tree the interactive prep board lets you walk to any depth. Scores are from Mario Jr. Bertok's side.
First moves as White (123 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c4 | 71 | 57.7% | 59.9% |
| d4 | 36 | 29.3% | 58.3% |
| e4 | 12 | 9.8% | 50.0% |
| Nf3 | 3 | 2.4% | 50.0% |
| b3 | 1 | 0.8% | 50.0% |
Main lines as White
- 1.c4 — 58% of White games, 59.9% score
- …Nf6 (32% of these games) — Bertok usually continues Nc3 (65.0% score)
- …e5 (24% of these games) — Bertok usually continues Nc3 (44.1% score)
- …c5 (18% of these games) — Bertok usually continues Nc3 (63.6% score)
- 1.d4 — 29% of White games, 58.3% score
- …Nf6 (42% of these games) — Bertok usually continues c4 (40.9% score)
- …d5 (36% of these games) — Bertok usually continues Nf3 (68.8% score)
- …g6 (8% of these games) — Bertok usually continues c4 (75.0% score)
As Black against 1.e4 (61 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| c5 | 51 | 83.6% | 45.1% |
| c6 | 5 | 8.2% | 60.0% |
| e5 | 3 | 4.9% | 50.0% |
| g6 | 1 | 1.6% | 0.0% |
| e6 | 1 | 1.6% | 50.0% |
As Black against 1.d4 (31 games)
| Move | Games | Share | Player score |
|---|---|---|---|
| d5 | 20 | 64.5% | 52.5% |
| Nf6 | 11 | 35.5% | 36.4% |
Mario Jr. Bertok's chess games
All 240 games by Mario Jr. Bertok in the Chess.ceo database (Jan 2019 - 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: 62 wins, 128 draws, 50 losses.
Openings as White
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| A13 | English Opening | 23 | 10/10/3 | 43.5% |
| A25 | English Opening: Reverse Sicilian | 19 | 6/5/8 | 31.6% |
| D13 | Slav Defense | 9 | 2/6/1 | 22.2% |
| E78 | King's Indian Defense: Four Pawns Attack | 8 | 2/5/1 | 25.0% |
| A36 | English Opening: Symmetrical | 7 | 1/5/1 | 14.3% |
| E01 | Catalan | 6 | 2/3/1 | 33.3% |
| A55 | Indian Defense | 6 | 1/5/0 | 16.7% |
| A42 | Modern Defense | 4 | 2/2/0 | 50.0% |
| A80 | Dutch Defense | 3 | 1/2/0 | 33.3% |
| D90 | Grünfeld Defense | 3 | 3/0/0 | 100.0% |
Openings as Black
| ECO | Opening | Games | W/D/L | Win rate |
|---|---|---|---|---|
| B67 | Sicilian | 29 | 8/12/9 | 27.6% |
| A36 | English Opening | 9 | 2/5/2 | 22.2% |
| D27 | Queen's Gambit Accepted | 8 | 2/6/0 | 25.0% |
| D24 | Queen's Pawn Game | 6 | 1/5/0 | 16.7% |
| B22 | Sicilian: Alapin | 5 | 1/3/1 | 20.0% |
| A05 | Réti Opening | 5 | 2/1/2 | 40.0% |
| A36 | English Opening: Symmetrical | 5 | 0/4/1 | 0.0% |
| B84 | Sicilian: Najdorf | 4 | 1/2/1 | 25.0% |
| B31 | Sicilian: Rossolimo | 4 | 0/2/2 | 0.0% |
| E92 | King's Indian Defense: Orthodox Variation | 3 | 0/3/0 | 0.0% |
Notable wins
| Date | Opponent | Elo | Event | ECO |
|---|---|---|---|---|
| Apr 1973 | Andras Adorjan | 2,475 | Birmingham | A36 |
| Jan 2001 | Blazimir Kovacevic | 2,457 | Zagreb Koncar | D37 |
| Jan 1977 | Mihai Suba | 2,455 | Georgievic Memorial 01 | A38 |
| Feb 1977 | Radovan Govedarica | 2,440 | 32nd ch-YUG | A26 |
| Jan 1998 | Branko Kutuzovic | 2,425 | CRO-Cup | B15 |
Top events
| Event | Year | Games | Score | TPR |
|---|---|---|---|---|
| chT-CRO | 2004 | 37 | 17.5 | 2,334 |
| 32nd ch-YUG | 1977 | 13 | 7 | 2,482 |
| Reggio Emilia 23 1980/81 | 1981 | 13 | 7.5 | 2,415 |
| Ribnica | 1979 | 13 | 6.5 | 2,420 |
| Virovitica | 1977 | 13 | 6 | 2,409 |
| chT2-CRO | 1997 | 11 | 7 | 2,344 |
| Reggio Emilia-19 1976/77 | 1977 | 11 | 5.5 | 2,380 |
| Reggio Emilia-26 B 8384 | 1984 | 11 | 6 | 2,344 |
Interactive opening tree from all 240 games, weak-spot detection and engine analysis.
Start preparationFrequently asked questions
Where can I find Mario Jr. Bertok's chess games?
240 games by Mario Jr. Bertok, from Jan 2019 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 Mario Jr. Bertok has played.
What does Mario Jr. Bertok play on the first move as White?
Across 123 games with White in our database, Mario Jr. Bertok opens with 1.c4 (58% of games), 1.d4 (29% of games), 1.e4 (10% of games). Against 1.e4 as Black, Mario Jr. Bertok answers 1...c5 (84% of games), 1...c6 (8% of games), 1...e5 (5% of games). Against 1.d4: 1...d5 (65% of games), 1...Nf6 (35% of games).
What openings does Mario Jr. Bertok play as White?
As White, Mario Jr. Bertok's most-played openings in our database are: English Opening (23 games, 43.5% win rate); English Opening: Reverse Sicilian (19 games, 31.6% win rate); Slav Defense (9 games, 22.2% win rate). The full breakdown of 123 games with White is in the table above.
What openings does Mario Jr. Bertok play as Black?
As Black, Mario Jr. Bertok most often plays: Sicilian (29 games, 27.6% win rate); English Opening (9 games, 22.2% win rate); Queen's Gambit Accepted (8 games, 25.0% win rate). See the table above for the top ten Black openings across 117 games.
What is Mario Jr. Bertok's FIDE rating?
Mario Jr. Bertok is currently rated 2,135 in classical chess, 2,128 in rapid and 2,072 in blitz. Peak classical rating: 2,178 (Aug 2021).
How many games has Mario Jr. Bertok played?
Our database contains 240 games by Mario Jr. Bertok, covering Jan 2019 to Jul 2026. Overall record: 62 wins, 128 draws, 50 losses (25.8% win rate).
How do I prepare against Mario Jr. Bertok?
240 games by Mario Jr. Bertok 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.