Harry Nelson Pillsbury vs Clarence Seaman Howell
Blindfold simul, 12b New York, NY USA 1900.04.30
Vienna Game 1-0

Eugene Delmar vs Clarence Seaman Howell
NYSCA Mid-Summer Meeting. Trophy Section Trenton Falls, NY USA round 1 1908.07.21
London System: Poisoned Pawn Variation 0-1

Nelson Hald vs Clarence Seaman Howell
N.Y. Clipper Counter-Gambit corr t USA 1902.??.??
King’s Gambit Accepted 0-1

Frank James Marshall vs Clarence Seaman Howell
Brooklyn CC ch New York, NY USA 1901.01.05
Dutch Defense: Queen’s Knight Variation 0-1