J White vs Albert William Ensor
Toronto Toronto 1873.??.??
Queen’s Gambit Declined: Alapin Variation 0-1

Jaan Yukhanovich Ehlvest vs Ilya Dudukin
Pro Chess League chess.com INT round 2 2018.01.25
English Opening: Symmetrical Variation, Botvinnik System 1/2-1/2

Jackson Whipps Showalter vs Constant Ferdinand Burille
6th American Chess Congress New York, NY USA round 3 1889.03.27
Italian Game: Evans Gambit 1-0

Jacob Bernstein vs Frank James Marshall
New York Masters New York, NY USA round 8 1915.04.29
Four Knights Game: Alatortsev Variation 0-1

Jacob Foged Christensen vs Alexander Moiseenko
Xtracon Open Helsingor DEN round 1.6 2019.07.20
Döry Defense 0-1

Jacob Gerard Baay vs Johan Teunis Barendregt
NED-ch sf Nijmegen NED round 3 1948.11.17
Alekhine Defense: Modern Variation, Alekhine Variation 1-0

Jacob Levin vs George Shainswit
Ventnor City Ventnor City, NJ USA round 5 1942.06.23
Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variation 1/2-1/2

Jacob Yuchtman vs Tigran Vartanovich Petrosian
Ch URS ( 1/2 ) Tbilisi URS round 3 1956.11.21
Sicilian Defense: Canal Attack, Haag Gambit 1/2-1/2

Jacques Davidson vs Max Euwe
Match Rotterdam NED round 2 1924.11.24
Slav Defense: Exchange Variation 1-0

Jacques Mieses vs Erich Cohn
Ostend-B Ostend BEL round 2 1907.05.17
Amar Gambit 0-1