Mario Bertok was a Croatian International Master and sports journalist who wrote for the daily newspaper Sportske novosti. Born in Zagreb, he was a specialist in the King's Indian Defence, particularly the Four Pawns Attack variation.

Associated Openings

As White

E78King's Indian Defence, Four Pawns Attack: 1.d4 Nf6 2.c4...... 7.Nf313 games

E79King's Indian Defence, Four Pawns Attack: 1.d4 Nf6 2.c4...... 9.Be38 games

Study Mario Bertok's repertoire on Chessiverse

Challenge 600+ AI opponents with unique personalities and opening repertoires.

Play on Chessiverse

Discover Your Chess Personality

Are you an aggressive attacker like Tal, a positional genius like Carlsen, or a solid defender like Petrosian? Take our free personality test to find out which archetype matches your playing style.

Take the Chess Personality Test

IM Mario Bertok

Associated Openings

As White

Study Mario Bertok's repertoire on Chessiverse

Discover Your Chess Personality