Branko Damljanovic vs Johann Hjartarson
Belgrade Investbank Belgrade YUG round 1 1989.11.14
English Opening: Symmetrical Variation, Four Knights Variation 1/2-1/2

Johann Hjartarson vs Jesus Nogueiras
Belfort World Cup Belfort FRA round 11 1988.06.27
French Defense: Winawer Variation, Advance Variation 0-1

Johann Hjartarson vs Christian Bauer
Pro Chess League chess.com INT round 8 2018.02.28
Australian Defense 0-1

Viktor Korchnoi vs Johann Hjartarson
Reykjavik World Cup Reykjavik ISL round 8 1988.10.12
English Opening: Anglo-Indian Defense 0-1

Federico Perez Ponsa vs Johann Hjartarson
Pro Chess League chess.com INT round 7 2018.02.24
English Opening: Anglo-Indian Defense, Grünfeld Formation 0-1

Johann Hjartarson vs Miguel Illescas Cordoba
Linares Linares ESP round 2 1988.02.24
Queen’s Gambit Declined: Tarrasch Defense, Stoltz Variation 1/2-1/2

Johann Hjartarson vs Nigel Short
3rd Euwe Memorial Amsterdam NED round 6 1989.03.23
English Opening: King’s English Variation 0-1

Garry Kasparov vs Johann Hjartarson
Reykjavik Blitz Reykjavik round 12 2004.03.17
Nimzo-Indian Defense: Three Knights Variation, Duchamp Variation 1-0

Ivan Cheparinov vs Johann Hjartarson
Gibraltar Masters La Caleta GIB round 9.22 2019.01.30
King’s Indian Defense: Makogonov Variation 1-0

Anatoly Karpov vs Johann Hjartarson
Belfort World Cup Belfort FRA round 2 1988.06.15
Queen’s Gambit Declined: Barmen Variation 1-0