Chess career
In January 2020, Jacobson won the 2020 Charlotte Open in Charlotte, North Carolina, with a score of 7.0/9, half a point ahead of GM Cemil Can Ali Marandi, GM Akshat Chandra, GM Andrew Tang, GM Ulvi Bajarani, and IM Aaron Grabinsky. He earned his final GM norm and a $3000 prize. [5]
Later in 2020, Jacobson participated in the 2020 US Junior Chess Championship. He ended the tournament with a 5.5 score and 4th in rankings. [6]
In May 2024, Jacobson gained notoriety by playing a dubious opening (1.a4 and 2.Ra3 as White and 1...a5 and 2...Ra6 as Black) during a match against Daniel Naroditsky, defeating him (+37, -26, =6). Jacobson's chess.com account (named "Viih_Sou") was later banned for cheating, though former World Champion Magnus Carlsen would later use the opening in all blitz games of the subsequent Early Titled Tuesday. [7]
| a | b | c | d | e | f | g | h | ||
| 8 |          | 8 | |||||||
| 7 | 7 | ||||||||
| 6 | 6 | ||||||||
| 5 | 5 | ||||||||
| 4 | 4 | ||||||||
| 3 | 3 | ||||||||
| 2 | 2 | ||||||||
| 1 | 1 | ||||||||
| a | b | c | d | e | f | g | h | ||
In December 2024, Jacobson again used the dubious opening 1.a4 (though without playing 2.Ra3), this time against Hikaru Nakamura in the World Rapid Chess Championship 2024, winning the game in 47 moves. [8]
