|Country||Yugoslavia → Bosnia and Herzegovina|
|Born||21 May 1966|
|FIDE rating||2601 (October 2021)|
|Peak rating||2640 (October 2004)|
Born in the north-western Bosnian town of Bihać (then Socialist Federal Republic of Yugoslavia), Kožul was awarded the title of Grandmaster by FIDE in 1989. In 1989 and 1990, Kozul won consecutive Yugoslavian championships. Also in 1990, Kozul won the bronze medal playing for the Yugoslav team at the Chess Olympiad in Novi Sad.
After the break-up of Yugoslavia, Kozul played for Bosnia and Herzegovina, and he was a part of the Bosnian team in the Olympiad 1992. In 1993, Kozul, an ethnic Croat, settled in Croatia, thereafter representing that country. In 1995, he won an open tournament in Zadar.[better source needed] In 1999, he came first at the 4th Nova Gorica Open. In 2003, he won the 11th Vasja Pirc Memorial at Maribor.
In 2004, Kožul reached the final sixteen at the FIDE World Chess Championship, 2004 in Tripoli, before being eliminated by the Bulgarian grandmaster and future world champion Veselin Topalov. In 2006 he won the European Individual Chess Championship in Kusadasi. This achievement qualified him to the FIDE World Cup 2007. Kožul won the Croatian Chess Championships of 2006 and 2015.
In March 2012, Kožul came first in the Zagreb Open.
- Alexey Shirov vs Zdenko Kozul, Cup European Club (final) 1996, Sicilian Defense: Richter-Rauzer, Neo-Modern Variation (B67), 0-1
- Joel Benjamin vs Zdenko Kozul, WchT 4th 1997, Sicilian Defense: Richter-Rauzer, Neo-Modern Variation (B67), 0-1
- Zdenko Kozul vs Sergei Rublevsky, FIDE World Championship Knockout Tournament 2004, Slav Defense: Quiet Variation (D11), 1-0
- Bartelski, Wojciech. "29th Chess Olympiad: Novi Sad 1990". OlimpBase. Retrieved 2009-07-08.
- "Zadar op 1995". 365Chess.com. Retrieved 2009-07-08.
- Crowther, Mark (1999-02-08). "TWIC 222: Nova Gorica". London Chess Center. Retrieved 1 January 2010.
- Crowther, Mark (2003-02-24). "The Week in Chess 433: 11th Vasja Pirc Memorial". London Chess Center. Retrieved 2009-07-08.
- Crowther, Mark (2006-04-17). "The Week in Chess 597: 7th European Individual Chess Championships". London Chess Center. Retrieved 2009-07-08.
- "Ekaterina Atalik and Zdenko Kozul European Champions". Chess News. ChessBase. 2006-04-16. Retrieved 2019-09-22.
- "Zagreb Open 2012 A-tournament International Chess Tournament". Chess-Results.com. 2012-03-12. Retrieved 13 March 2012.
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