Isidor Gunsberg - Chess Strength

Chess Strength

Arpad Elo calculates that Gunsberg's best 5-year average Elo rating was 2560. According to Chessmetrics, Gunsberg's best single performance was his 1887 match against Blackburne, where he scored 8 of 13 possible points (62%). Also, Gunsberg's performance in the world championship match against Steinitz indicated he was a part of the world elite in the late 1880s and early 1890s. However, in the year he qualified for the match against Steinitz, 1889, Gunsberg played in three different international tournaments: Amsterdam, the German Chess Congress, and the US Chess Congress. At Amsterdam, he finished in 5th place out of 9 competitors with a −1 score, 4/9, behind Burn, a young Emanuel Lasker, Mason, and Van Vliet. At the German Chess Congress, he finished tied for 4th–7th places out of 18 competitors, with a +3 score, 10/17, behind Tarrasch, Burn, and Mieses. Finally, at the US Chess Congress, his best result, and the reason he was allowed to challenge Steinitz, he finished in lone 3rd place out of 20 competitors, with a +19 score, 28½/38, behind Weiss and Chigorin.

Later on, Gunsberg's position among the foremost chess masters would slip. In the famous Hastings 1895 chess tournament, Gunsberg finished with a −3 score of 9/21, good for a share of 15th–16th place out of 22 competitors.