Graham Morrison vs William Alfaro
Chess Olympiad Istanbul TUR round 7.51 2012.09.04
Benko Gambit 1/2-1/2

William Alfaro vs Bilam Lal Shrestha
Chess Olympiad Baku AZE round 2.50 2016.09.03
Catalan Opening: Closed 0-1

William Alfaro vs Roberto Carlos Sanchez Alvarez
FIDE Online Olympiad Chess.com round 1 2020.08.07
Sicilian Defense: Alapin Variation 0-1

Clarence Psaila vs William Alfaro
Chess Olympiad Istanbul TUR round 9.67 2012.09.06
Pirc Defense: Classical Variation 0-1

Hector Leyva vs William Alfaro
Internacional Alajuela Alajuela, Costa Rica round 7.5 2005.07.26
English Opening: Anglo-Indian Defense 1-0

Tomu Sano vs William Alfaro
Olympiad Dresden GER round 8 2008.11.21
Sicilian Defense: Dragon Variation, Yugoslav Attack 1/2-1/2

Ben Hague vs William Alfaro
Chess Olympiad Baku AZE round 5.46 2016.09.06
Sicilian Defense: Dragon Variation, Yugoslav Attack 1-0

Stelios Theocharous vs William Alfaro
Chess Olympiad Baku AZE round 10.45 2016.09.12
Sicilian Defense: Accelerated Dragon 1/2-1/2

Leonardo Valdes vs William Alfaro
2nd Alajuela Open Alajuela CRC round 3 2006.07.13
Colle System: Rhamphorhynchus Variation 1-0

Leonardo Valdes Romero vs William Alfaro
FIDE Online Olympiad Chess.com round 6 2020.08.08
English Opening: Anglo-Indian Defense, Grünfeld Formation 1-0