Albert Hodges vs Jackson Whipps Showalter
Showalter - Hodges US Championship Rematch Brooklyn, New York USA round 4 1894.06.02
Ruy Lopez: Berlin Defense 1-0

Jackson Whipps Showalter vs Albert Hodges
Showalter - Hodges US Championship New York, NY USA round 7 1894.02.27
Ruy Lopez: Open 0-1

Jackson Whipps Showalter vs Emanuel Lasker
New York New York, NY USA round 11 1893.10.14
Ruy Lopez: Morphy Defense, Steinitz Deferred 0-1

Jackson Whipps Showalter vs Max Judd
US Championship match St Louis, MO USA round 5 1890.??.??
Ruy Lopez: Morphy Defense, Steinitz Deferred 1-0

Amos Burn vs Jackson Whipps Showalter
3rd Anglo-American Cable Match London ENG / New York USA round 1.2 1898.03.18
Queen’s Gambit Declined: Orthodox Defense 0-1

Frank James Marshall vs Jackson Whipps Showalter
hex New York round 7 1900.11.06
Queen’s Gambit Declined: Orthodox Defense, Alekhine Variation 0-1

Harry Nelson Pillsbury vs Jackson Whipps Showalter
Pillsbury - Showalter US Championship Brooklyn, New York USA round 3 1897.02.17
Blackburne Shilling Gambit 1-0

Jackson Whipps Showalter vs David Janowski
Janowski - Showalter Third Match Brooklyn, New York USA round 7 1899.04.07
Amazon Attack 1-0

Jackson Whipps Showalter vs Harry Nelson Pillsbury
Pillsbury - Showalter US Championship Brooklyn, New York USA round 10 1897.03.12
Dresden Opening: The Goblin 1-0

David Janowski vs Jackson Whipps Showalter
Janowski - Showalter Third Match Brooklyn, New York USA round 4 1899.04.02
Queen’s Gambit Declined: Exchange Variation 1-0