| Karl Thorsteins | |
| Country: | Iceland |
| Birth Date: | 13 October 1964 |
| International Master (1985) | |
| Peakrating: | 2510 (January 1994) |
| Fideid: | 2300060 |
Karl Thorsteins (born October 13, 1964) is an Icelandic chess player who has been an International Master since 1985. He won the Icelandic Chess Championship twice: in 1985 and 1989.[1] In 1988, he played in the Reykjavík Invitational Tournament, finishing in tenth with a total of 5 points. A game he lost to Jóhann Hjartarson in this tournament was highlighted by Robert Byrne in the New York Times.[2]