[1][2][3] He was also the tutor of William Samuel Viner, who later became the Australian Chess Champion himself.
[4] Jacobsen's chess prowess first came to public attention when he was fourteen, when he defeated some very strong English players, leading Wilhelm Steinitz to dub him the "boy prodigy".
[4][5] At the age of sixteen, he defeated Henry Bird (+4 -2 =1) in an April 1879 match.
[6] An article published in the Sydney Mail in 1897, shortly after Jacobsen's victory in that year's Australian Chess Championship, stated that "His style of play is very attractive to onlookers, and his chess combinations are rapidly conceived and brilliantly executed.
"[5] His obituary in the Sydney Morning Herald said that his "...style was extremely brilliant, and he played rapidly even in complicated positions.