Player profile
Alfaro, William
Dossier
117 of 144 games analyzed.
Accuracy: 89.6%
Opened d4: 29/37Opened Nf3: 8/37
Castled kingside: 68Same-side castling: 64Castled queenside: 3Opposite-side castling: 2Did not castle: 2
Fianchettoed kingside: 53Played in the center: 21Played on the queenside: 19Played on the kingside: 15Fianchettoed queenside: 9
Active pieces: 65Initiated exchanges: 54Kept the bishop pair: 50Sacrificed material: 44Backward pawn: 42Space advantage: 42Isolated pawn: 36Missed tactics: 16Played gambits: 12Avoided exchanges: 11
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 51 games 27W 11D 13L
Queen's Gambit Declined 12 games 6W 1D 5L
(unspecified) 2 games 1W 0D 1L
(unspecified)
2 games
1W
0D
1L
Three Knights Variation 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Orthodox Defense 2 games 1W 0D 1L
Main Line
1 game
0W
0D
1L
Bd3 Line
1 game
1W
0D
0L
Westphalian Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Janowski Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Modern Variation 1 game 0W 0D 1L
Normal Line
1 game
0W
0D
1L
Vienna Variation 1 game 0W 0D 1L
Quiet Variation
1 game
0W
0D
1L
Cambridge Springs Defense 1 game 1W 0D 0L
Yugoslav Variation
1 game
1W
0D
0L
Tartakower Defense 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
King's Indian Defense 7 games 4W 2D 1L
Fianchetto Variation 7 games 4W 2D 1L
Yugoslav System
2 games
2W
0D
0L
Debrecen Defense
1 game
1W
0D
0L
Panno Variation
1 game
1W
0D
0L
Yugoslav Variation, Rare Line
1 game
0W
0D
1L
Carlsbad Variation
1 game
0W
1D
0L
Classical Variation
1 game
0W
1D
0L
Slav Defense 5 games 4W 0D 1L
Three Knights Variation 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Exchange Variation 1 game 1W 0D 0L
Symmetrical Line
1 game
1W
0D
0L
Modern Line 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Czech Variation 1 game 0W 0D 1L
Krause Attack
1 game
0W
0D
1L
Catalan Opening 4 games 3W 1D 0L
Closed 3 games 2W 1D 0L
(unspecified)
2 games
1W
1D
0L
Main Line
1 game
1W
0D
0L
Open Defense 1 game 1W 0D 0L
Classical Line
1 game
1W
0D
0L
English Opening 4 games 1W 3D 0L
Agincourt Defense 2 games 0W 2D 0L
Catalan Defense Accepted
1 game
0W
1D
0L
(unspecified)
1 game
0W
1D
0L
Symmetrical Variation 1 game 0W 1D 0L
Mecking Variation
1 game
0W
1D
0L
Neo-Catalan 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Neo-Grünfeld Defense 3 games 3W 0D 0L
Delayed Exchange Variation 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Exchange Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Benko Gambit Accepted 2 games 1W 1D 0L
Modern Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Fianchetto Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Indian Defense 2 games 2W 0D 0L
Przepiorka Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Anti-Nimzo-Indian 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Semi-Slav Defense 2 games 0W 1D 1L
Botvinnik Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Indian Defense 2 games 0W 0D 2L
Fianchetto Variation 1 game 0W 0D 1L
Check Variation, Intermezzo Line
1 game
0W
0D
1L
Classical Variation 1 game 0W 0D 1L
Traditional Variation, Nimzowitsch Line
1 game
0W
0D
1L
Queen's Gambit Accepted 2 games 0W 1D 1L
Janowski-Larsen Variation 2 games 0W 1D 1L
(unspecified)
2 games
0W
1D
1L
Queen's Pawn Game 2 games 1W 0D 1L
Symmetrical Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Rossolimo Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Dutch Defense 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Grünfeld Defense 1 game 1W 0D 0L
Exchange Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Benoni Defense 1 game 0W 0D 1L
Classical Variation 1 game 0W 0D 1L
New York Variation
1 game
0W
0D
1L
Tarrasch Defense 1 game 1W 0D 0L
Prague Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
As Black 49 games 19W 14D 15L
Sicilian Defense 21 games 7W 7D 6L
Nyezhmetdinov-Rossolimo Attack 5 games 2W 1D 2L
Fianchetto Variation
4 games
1W
1D
2L
(unspecified)
1 game
1W
0D
0L
Accelerated Dragon 3 games 1W 1D 1L
Maróczy Bind
2 games
1W
1D
0L
Modern Bc4 Variation
1 game
0W
0D
1L
Hyperaccelerated Dragon 2 games 0W 1D 1L
(unspecified)
2 games
0W
1D
1L
Old Sicilian 2 games 0W 1D 1L
(unspecified)
2 games
0W
1D
1L
Alapin Variation 2 games 1W 1D 0L
(unspecified)
1 game
0W
1D
0L
Smith-Morra Declined
1 game
1W
0D
0L
Closed 2 games 1W 1D 0L
(unspecified)
1 game
1W
0D
0L
Traditional
1 game
0W
1D
0L
Czerniak Attack 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Nimzowitsch Variation 1 game 1W 0D 0L
Advance Variation
1 game
1W
0D
0L
Prins Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Staunton-Cochrane Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Dragon Variation 1 game 0W 0D 0L
Yugoslav Attack, Panov Variation
1 game
0W
0D
0L
English Opening 6 games 3W 2D 1L
Symmetrical Variation 5 games 3W 1D 1L
Three Knights, Fianchetto Variation
2 games
1W
0D
1L
Botvinnik System
2 games
2W
0D
0L
Anti-Benoni Variation
1 game
0W
1D
0L
King's English Variation 1 game 0W 1D 0L
Closed System
1 game
0W
1D
0L
Benko Gambit Accepted 6 games 3W 1D 2L
Fully Accepted Variation 3 games 2W 1D 0L
(unspecified)
3 games
2W
1D
0L
Pawn Return Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
King Walk Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Modern Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Benoni Defense 5 games 1W 2D 2L
Hromádka System 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Old Benoni 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Modern Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Classical Variation 1 game 0W 1D 0L
New York Variation
1 game
0W
1D
0L
King's Indian Defense 3 games 0W 1D 2L
Fianchetto Variation 3 games 0W 1D 2L
(unspecified)
1 game
0W
0D
1L
Yugoslav System
1 game
0W
0D
1L
Yugoslav Variation
1 game
0W
1D
0L
Indian Defense 2 games 1W 0D 1L
Accelerated London System 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Przepiorka Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
East Indian Defense 2 games 2W 0D 0L
(unspecified) 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Polish Opening 1 game 1W 0D 0L
Bugayev Attack 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Nimzo-Larsen Attack 1 game 0W 0D 1L
Indian Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Rapport-Jobava System 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Modern Defense 1 game 1W 0D 0L
Beefeater Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Blunders Top 4 of 485
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 144 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.08.07 | Round 3: Bustamante Cruz, Alejandro - Alfaro, William | 3.7 | 2026.08.07 Bustamante Cruz, Alejandro (5107296) (1982) | 1 | 90.10% | 1. b4 e5 2. a3 d5 3. Bb2 Nd7 | |
| 2026.08.06 | Round 2: Alfaro, William - Ramirez Padilla, Miguel Angel | 2.13 | 2026.08.06 Ramirez Padilla, Miguel Angel (5120551) (1919) | 1 | 96.40% | 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 | |
| 2026.08.06 | Round 1: Zuniga Samano, Pablo Javier - Alfaro, William | 1.15 | 2026.08.06 Zuniga Samano, Pablo Javier (5173582) (1870) | ½ | 89.50% | 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 | |
| 2026.06.10 | Round 11: Alfaro, William - Morales Perez, Ghisell | 11.37 | 2026.06.10 Morales Perez, Ghisell (4497198) (1939) | 1 | 91.30% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.06.09 | Round 10: Duarte Cramer, Lily Jeanette - Alfaro, William | 10.42 | 2026.06.09 Duarte Cramer, Lily Jeanette (29620180) (1949) | ½ | 91.70% | 1. d4 Nf6 2. c4 c5 3. d5 d6 | |
| 2026.06.08 | Round 9: Alfaro, William - Bedi, Vaibhav | 9.46 | 2026.06.08 Bedi, Vaibhav (7501900) (1920) | 1 | 93.00% | 1. Nf3 Nf6 2. g3 g6 3. d4 e6 | |
| 2026.06.08 | Round 9: Diaz Perez, Michel Alejandro - Alfaro, William | 9.15 | 2026.06.08 Diaz Perez, Michel Alejandro (3517179) (2362) | 0 | - | 1. Nf3 c5 2. e4 g6 3. c3 d5 | |
| 2026.06.08 | Round 8: Alfaro, William - Bedi, Vaibhav | 8.20 | 2026.06.08 Bedi, Vaibhav (7501900) (1858) | 1 | - | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.06.08 | Round 7: Duarte Cramer, Lily Jeanette - Alfaro, William | 7.14 | 2026.06.08 Duarte Cramer, Lily Jeanette (29620180) (1909) | 0 | - | 1. d4 Nf6 2. Bf4 g6 3. c4 c5 | |
| 2026.06.08 | Round 6: Alfaro, William - Montiel Sanchez, Victor Manuel | 6.19 | 2026.06.08 Montiel Sanchez, Victor Manuel (5119286) (1877) | 1 | - | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2026.06.08 | Round 5: Garcia Almaguer, Juan Manuel - Alfaro, William | 5.12 | 2026.06.08 Garcia Almaguer, Juan Manuel (5110491) (2112) | 0 | - | 1. e4 c5 2. Nf3 Nc6 3. d3 g6 | |
| 2026.06.08 | Round 4: Alfaro, William - Orocio Mendoza, Egbert David | 4.18 | 2026.06.08 Orocio Mendoza, Egbert David (5185602) (1670) | 1 | - | 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 | |
| 2026.06.08 | Round 3: Padilla Liceaga, Jorge - Alfaro, William | 3.30 | 2026.06.08 Padilla Liceaga, Jorge (5102642) (1957) | 1 | - | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.06.08 | Round 2: Alfaro, William - Diaz Guerrero, Jesus Daniel | 2.19 | 2026.06.08 Diaz Guerrero, Jesus Daniel (3979288) (2294) | 0 | - | 1. d4 d5 2. c4 e6 3. Nc3 a6 | |
| 2026.06.08 | Round 1: Galvan Rodriguez, Irving Gamaliel - Alfaro, William | 1.31 | 2026.06.08 Galvan Rodriguez, Irvin Gamaliel (29630061) (1679) | ½ | - | 1. e4 c5 2. Nf3 g6 3. d4 cxd4 | |
| 2026.06.07 | Round 8: Alfaro, William - Hernandez Vazquez, Gerardo | 8.38 | 2026.06.07 Hernandez Vazquez, Gerardo (5127327) (1984) | 0 | 83.40% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2026.06.06 | Round 7: Montes Orozco, Miguel Angel - Alfaro, William | 7.29 | 2026.06.06 Montes Orozco, Miguel Angel (5159989) (2295) | 0 | 91.20% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.06.06 | Round 9: Alfaro, William - Ozuna Ramos, Kevin | 9.18 | 2026.06.06 Ozuna Ramos, Kevin (5140560) (1933) | ½ | - | 1. d4 Nf6 2. Nf3 d5 3. c4 c6 | |
| 2026.06.06 | Round 8: Cu Hor, Winston Darwin - Alfaro, William | 8.14 | 2026.06.06 Cu Hor, Winston Darwin (7300662) (2308) | 0 | - | 1. Nf3 c5 2. c4 g6 3. g3 Bg7 | |
| 2026.06.06 | Round 7: Alfaro, William - Mendoza Osorio, Ernesto | 7.19 | 2026.06.06 Mendoza Osorio, Ernesto (29644950) (1873) | 1 | - | 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 | |
| 2026.06.06 | Round 6: Valadez Sepulveda, Joel Isaac - Alfaro, William | 6.17 | 2026.06.06 Valadez Sepulveda, Joel Isaac (5180520) (1933) | ½ | - | 1. c4 g6 2. Nc3 Bg7 3. g3 e5 | |
| 2026.06.06 | Round 4: Luna Monsalve, Sofia - Alfaro, William | 4.18 | 2026.06.06 Luna Monsalve, Sofia (4486846) (1779) | 1 | - | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.06.06 | Round 3: Alfaro, William - Diaz Perez, Michel Alejandro | 3.8 | 2026.06.06 Diaz Perez, Michel Alejandro (3517179) (2457) | 0 | - | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.06.06 | Round 2: Garzon Camelo, Andres Santiago - Alfaro, William | 2.11 | 2026.06.06 Garzon Camelo, Andres Santiago (4496370) (2358) | ½ | - | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | |
| 2026.06.06 | Round 1: Alfaro, William - Duarte Cramer, Evelynn Renata | 1.29 | 2026.06.06 Duarte Cramer, Evelynn Renata (29620198) (1579) | 1 | - | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2026.06.05 | Round 6: Plotkin, Mark - Alfaro, William | 6.22 | 2026.06.05 Plotkin, Mark (2611651) (2360) | 0 | 76.10% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.06.05 | Round 5: Alfaro, William - Garzon Camelo, Andres Santiago | 5.21 | 2026.06.05 Garzon Camelo, Andres Santiago (4496370) (2367) | ½ | 90.20% | 1. Nf3 Nf6 2. c4 e6 3. g3 d5 | |
| 2026.06.05 | Round 5: Alfaro, William - Garcia de Dios, Jose Antonio | 5.10 | 2026.06.05 Garcia de Dios, Jose Antonio (5128919) (2186) | 0 | - | 1. d4 Nf6 2. Nf3 e6 3. c4 b6 | |
| 2026.06.04 | Round 4: Mateus, Martha - Alfaro, William | 4.36 | 2026.06.04 Mateus, Martha (4401549) (1951) | 1 | 97.70% | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | |
| 2026.06.04 | Round 3: Alfaro, William - Jackson, Leo Daniel Olivera | 3.40 | 2026.06.04 Jackson, Leo Daniel Olivera (39926818) (1886) | ½ | - | 1. d4 e6 2. c4 f5 3. g3 Nf6 | |
| 2026.06.04 | Round 1: Alfaro, William - Cisneros Arevalo, Francisco | 1.59 | 2026.06.04 Cisneros Arevalo, Francisco (5193680) (1570) | 1 | - | 1. d4 d5 2. c4 e6 3. Nf3 h6 | |
| 2026.06.03 | Round 2: Delgado Romero, Marco - Alfaro, William | 2.24 | 2026.06.03 Delgado Romero, Marco (3832457) (2373) | 0 | 92.00% | 1. e4 c5 2. Nf3 g6 3. d4 cxd4 | |
| 2025.12.20 | Round 9: Gonzalez Arellano, Julio Leonel - Alfaro, William | 18.13 | 2025.12.20 Gonzalez Arellano, Julio Leonel (5107261) (1912) | 1 | - | 1. e4 c5 2. Nc3 Nc6 3. g3 g6 | |
| 2025.12.20 | Round 8: Alfaro, William - Navarrete Mendez, Gonzalo Alberto | 17.8 | 2025.12.20 Navarrete Mendez, Gonzalo Alberto (5106850) (2252) | 0 | - | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2025.12.20 | Round 7: Gonzalez Brito, Abraham Eloy - Alfaro, William | 16.15 | 2025.12.20 Gonzalez Brito, Abraham Eloy (5156700) (1895) | 1 | - | 1. c4 c5 2. g3 g6 3. Bg2 Bg7 | |
| 2025.12.20 | Round 6: Alfaro, William - Perez Gormaz, Matias | 15.6 | 2025.12.20 Perez Gormaz, Matias (3406342) (2308) | 0 | 74.70% | 1. d4 d5 2. c4 e6 3. Nf3 h6 | |
| 2025.12.20 | Round 5: Pacheco Sierra, Diego Sebastian - Alfaro, William | 14.15 | 2025.12.20 Pacheco Sierra, Diego Sebastian (29688540) (1821) | 1 | - | 1. d4 Nf6 2. Nf3 g6 3. g3 c5 | |
| 2025.12.20 | Round 4: Alfaro, William - Rodriguez Osorio, Yair Steven | 13.16 | 2025.12.20 Rodriguez Osorio, Yair Steven (5126207) (1874) | 1 | - | 1. d4 d5 2. Nf3 Nf6 3. c4 e6 | |
| 2025.12.19 | Round 3: Encalada Basulto, Pablo David - Alfaro, William | 12.21 | 2025.12.19 Encalada Basulto, Pablo David (5176140) (1784) | 1 | 91.40% | 1. e4 c5 2. c4 Nc6 3. Nc3 g6 | |
| 2025.12.19 | Round 2: Alfaro, William - Diaz Servin, Luis Misael | 11.20 | 2025.12.19 Diaz Servin, Luis Misael (5183740) (1815) | 0 | 68.00% | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 | |
| 2025.12.19 | Round 1: Oxte Puc, Hector Jafet - Alfaro, William | 10.20 | 2025.12.19 Oxte Puc, Hector Jafet (29640911) (1599) | 1 | 96.80% | 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 | |
| 2025.12.19 | Round 7: May Sanchez, Andres Elias - Alfaro, William | 9.29 | 2025.12.19 May Sanchez, Andres Elias (5150973) (2166) | ½ | 95.40% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2025.12.18 | Round 5: Turincio Garcia, Sergio - Alfaro, William | 7.28 | 2025.12.18 Turincio Garcia, Sergio (5110041) (2057) | ½ | 87.60% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2025.12.18 | Round 4: Alfaro, William - Rolandi Rodriguez, Dario | 6.30 | 2025.12.18 Rolandi Rodriguez, Dario (5166675) (1952) | 1 | 89.80% | 1. d4 d5 2. Nf3 Nf6 3. c4 e6 | |
| 2025.12.17 | Round 6: Alfaro, William - Navarrete Mendez, Gonzalo Alberto | 8.27 | 2025.12.17 Navarrete Mendez, Gonzalo Alberto (5106850) (2101) | ½ | 97.20% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2025.07.28 | Ronda 9: Huerta Mendez, Gabino - Alfaro, William | 9.3 | 2025.07.28 Huerta Mendez, Gabino (5146950) (1969) | 1 | 77.20% | 1. d4 c5 2. c3 d5 3. Nf3 Nc6 | |
| 2025.07.28 | Ronda 8: Alfaro, William - Sanchez Ortiz, Diego Alonso | 8.4 | 2025.07.28 Sanchez Ortiz, Diego Alonso (29627907) (1588) | 1 | 91.40% | 1. d4 Nf6 2. Nf3 d5 3. c4 e6 | |
| 2025.07.28 | Ronda 7: Moreno Toxqui, Leonardo - Alfaro, William | 7.7 | 2025.07.28 Moreno Toxqui, Leonardo (5169860) (1647) | 1 | 87.10% | 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 | |
| 2025.07.28 | Ronda 6: Alfaro, William - Castillo Rodriguez, Gabriela | 6.10 | 2025.07.28 Castillo Rodriguez, Gabriela (29639662) (1585) | 1 | 85.60% | 1. d4 Nf6 2. Nf3 d6 3. c4 g6 | |
| 2025.07.28 | Ronda 5: Amaro Jimenez, Eduardo - Alfaro, William | 5.4 | 2025.07.28 Amaro Jimenez, Eduardo (5164893) (1880) | 0 | 80.00% | 1. e4 c5 2. b3 Nc6 3. Bb2 e5 | |
| 2025.07.28 | Ronda 4: Alfaro, William - Gonzalez, Gonzalez Isaac | 4.8 | 2025.07.28 Gonzalez Gonzalez, Isaac (5192110) | 1 | 86.80% | 1. d4 Nf6 2. Nf3 d5 3. c4 c6 | |
| 2025.07.27 | Ronda 3: Taylor Rodriguez, Cristrop - Alfaro, William | 3.2 | 2025.07.27 Taylor Rodriguez, Cristrop (5122767) | 0 | 92.40% | 1. b3 Nf6 2. Bb2 g6 3. Nf3 Bg7 | |
| 2025.07.27 | Ronda 2: Alfaro, William - Cesar Vidal, Fernando | 2.4 | 2025.07.27 Cesar Vidal, Fernando (29655757) (1744) | 1 | 97.10% | 1. d4 d5 2. Nf3 Nf6 3. c4 e6 | |
| 2025.07.27 | Ronda 1: Robles Sanchez, Naomi - Alfaro, William | 1.4 | 2025.07.27 Robles Sanchez, Naomi (5192471) (1526) | 1 | 38.50% | 1. c4 c5 2. Nc3 g6 3. g3 Bg7 | |
| 2025.07.27 | Ronda 6: Nipita Medina, Jesus Hassan - Alfaro, William | 6.3 | 2025.07.27 Nipita Medina, Jesus Hassan (5138817) (1830) | 1 | 91.40% | 1. e4 c5 2. Nf3 Nf6 3. e5 Nd5 | |
| 2025.07.27 | Ronda 5: Alfaro, William - Baez Ramos, Ulises | 5.4 | 2025.07.27 Baez Ramos, Ulises (550000756) | 1 | 86.60% | 1. d4 g6 2. Nf3 Bg7 3. c4 d6 | |
| 2025.07.27 | Ronda 3: Alfaro, William - Pizon, Edwin | 3.3 | 2025.07.27 Pizon, Edwin (551043130) (1817) | 0 | - | 1. d4 d5 2. Nf3 Nf6 3. c4 e6 | |
| 2025.07.27 | Ronda 2: Diaz, Munguia Salvador - Alfaro, William | 2.3 | 2025.07.27 Diaz Munguia, Salvador (29672040) | 1 | - | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 | |
| 2024.11.10 | Round 5: Yuan, Serena - Alfaro, William | 5.2 | 2024.11.10 Yuan, Serena (30985307) (1911) | 0 | 84.20% | 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 | |
| 2024.11.10 | Round 4: Pulijala, Akshaj - Alfaro, William | 4.2 | 2024.11.10 Pulijala, Akshaj (30990130) (1838) | ½ | 93.40% | 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 | |
| 2024.11.09 | Round 3: Alfaro, William - Yang, Maxwell | 3.2 | 2024.11.09 Yang, Maxwell (30965268) (1889) | 1 | 95.70% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2024.11.09 | Round 2: Yao, Hanchi - Alfaro, William | 2.2 | 2024.11.09 Yao, Hanchi (30957397) (2018) | 1 | 89.20% | 1. d4 g6 2. c4 Bg7 3. Nc3 c5 | |
| 2024.11.08 | Round 1: Alfaro, William - Jin, Austin | 1.2 | 2024.11.08 Jin, Austin (30989795) (1890) | 1 | 95.90% | 1. Nf3 d5 2. d4 Nf6 3. c4 e6 | |
| 2024.09.22 | 45th FIDE Chess Olympiad | 11.182 | 2024.09.22 Karsten, Jan (14350653) (2311) | 0 | 73.90% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 | |
| 2024.09.21 | 45th FIDE Chess Olympiad | 10.242 | 2024.09.21 Kanegeni, Matthew Kamau (10800255) (1976) | 1 | 89.80% | 1. d4 d5 2. Nf3 Nf6 3. c4 c6 | |
| 2024.09.20 | 45th FIDE Chess Olympiad | 9.182 | 2024.09.20 Middelburg, Tom (1004930) (2355) | 0 | 88.10% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 | |
| 2024.09.16 | 45th FIDE Chess Olympiad | 6.250 | 2024.09.16 Salim Mohammed, Salim Al Amri (22000089) (1926) | 1 | 96.50% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2024.09.15 | 45th FIDE Chess Olympiad | 5.166 | 2024.09.15 Olson, Hamish (2404257) (2384) | 0 | 84.60% | 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 | |
| 2024.09.14 | 45th FIDE Chess Olympiad | 4.237 | 2024.09.14 Hasford, John Kojo (12600083) (1956) | 1 | 94.20% | 1. d4 d6 2. Nf3 Nf6 3. c4 g6 | |
| 2024.09.13 | 45th FIDE Chess Olympiad | 3.150 | 2024.09.13 Rodriguez Vila, Andres (3000010) (2417) | 0 | 89.00% | 1. d4 d6 2. Nf3 g6 3. c4 f5 | |
| 2024.09.11 | 45th FIDE Chess Olympiad | 1.54 | 2024.09.11 Maurizzi, MarcAndria (36083534) (2595) | 0 | 88.20% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2024.09.03 | Round 9: Garduno Huerta, Joshua Emiliano - Alfaro, William | 9.11 | 2024.09.03 Garduno Huerta, Joshua Emiliano (5145848) (2116) | 1 | 96.90% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2024.09.03 | Round 8: Harish, Neeraj - Alfaro, William | 8.14 | 2024.09.03 Harish, Neeraj (30958130) (2101) | 1 | 94.70% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2024.09.02 | Round 7: Alfaro, William - Ubaldo Suarez, Maria Gisela | 7.21 | 2024.09.02 Ubaldo Suarez, Maria Gisela (3900630) (1958) | 1 | 95.50% | 1. d4 d5 2. c4 c6 3. Nf3 h6 | |
| 2024.09.02 | Round 6: Biyiasas, Theodore - Alfaro, William | 6.20 | 2024.09.02 Biyiasas, Theodore (2043173) (1970) | 0 | 91.70% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | |
| 2024.09.01 | Round 5: Alfaro, William - Bhatta, Rohit | 5.20 | 2024.09.01 Bhatta, Rohit (30965934) (2021) | ½ | 97.40% | 1. Nf3 d5 2. c4 e6 3. g3 Nf6 | |
| 2024.09.01 | Round 4: Gonzalez Zharikov, Andrey - Alfaro, William | 4.22 | 2024.09.01 Gonzalez Zharikov, Andrey (5145287) (2148) | ½ | 94.80% | 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 | |
| 2024.08.31 | Round 3: Alfaro, William - Sivakumar, Shaashwath | 3.17 | 2024.08.31 Sivakumar, Shaashwath (30912156) (2321) | 0 | 86.50% | 1. d4 d5 2. Nf3 Nf6 3. c4 c6 | |
| 2024.08.31 | Round 2: Bansal, Advay - Alfaro, William | 2.17 | 2024.08.31 Bansal, Advay (30951151) (2234) | ½ | 84.90% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 | |
| 2024.08.30 | Round 1: Alfaro, William - Macovei, Andrei | 1.11 | 2024.08.30 Macovei, Andrei (13904680) (2466) | 0 | 89.10% | 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 | |
| 2024.08.10 | Ronda 6: Alfaro, William - Avila Bautista, Roberto Al | 6.3 | 2024.08.10 Avila Bautista, Roberto Alejandro (5119987) (2170) | ½ | 87.90% | 1. Nf3 Nf6 2. c4 c5 3. g3 g6 | |
| 2024.08.08 | Ronda 3: Paz Valera, Luis Carlos - Alfaro, William | 3.3 | 2024.08.08 Paz Valera, Luis Carlos (5106869) (2069) | 0 | 85.20% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | |
| 2024.07.01 | Round 5: Alfaro, William - Fan, Shengjie | 5.5 | 2024.07.01 Fan, Shengjie (30980860) (1799) | 1 | 96.60% | 1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 | |
| 2024.06.30 | Round 4: Zhuge, Katherine - Alfaro, William | 4.5 | 2024.06.30 Zhuge, Katherine (30976715) (1750) | 1 | 96.40% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.06.30 | Round 3: Alfaro, William - Saravanan, Sujan | 3.5 | 2024.06.30 Saravanan, Sujan (30990637) (1734) | 1 | 97.20% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2024.06.29 | Round 2: Alfaro, William - Pulijala, Akshaj | 2.5 | 2024.06.29 Pulijala, Akshaj (30990130) (1904) | ½ | 94.30% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2024.06.29 | Round 1: Wu, Jayden - Alfaro, William | 1.5 | 2024.06.29 Wu, Jayden (30972558) (1928) | 1 | 91.80% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 | |
| 2024.03.24 | Round 9: Alfaro, William - Vanegas Lopez, Natanael Emanuel | 2024.03.24 Vanegas Lopez, Natanael Emanuel (6108326) (1943) | 1 | 96.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | ||
| 2024.03.24 | Round 8: Espinoza, Felix - Alfaro, William | 2024.03.24 Espinoza, Felix (6100503) (2071) | ½ | 88.40% | 1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 | ||
| 2024.03.23 | Round 7: Alfaro, William - Espinoza, Jose | 2024.03.23 Espinoza, Jose (6100511) (2050) | ½ | 93.20% | 1. d4 d6 2. Nf3 g6 3. c4 Bg7 | ||
| 2024.03.17 | Round 6: Fonseca Cabrera, Ernesto - Alfaro, William | 2024.03.17 Fonseca Cabrera, Ernesto (6101046) (2117) | ½ | 97.50% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | ||
| 2024.03.17 | Round 5: Alfaro, William - Pineda, Juan Jose | 2024.03.17 Pineda, Juan Jose (6100465) (1923) | 1 | 86.00% | 1. d4 Nf6 2. Nf3 e6 3. c4 d5 | ||
| 2024.03.16 | Round 4: Rocha, Maximiliano - Alfaro, William | 2024.03.16 Rocha, Maximiliano (6100775) (2126) | ½ | 89.90% | 1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4 | ||
| 2024.03.10 | Round 3: Alfaro, William - Espinoza Solano, Jose Nahum | 2024.03.10 Espinoza Solano, Jose Nahum (6104428) (2102) | ½ | 99.10% | 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 | ||
| 2024.03.10 | Round 2: Picado, Jorge - Alfaro, William | 2024.03.10 Picado, Jorge (6100376) (2100) | ½ | 98.70% | 1. e4 c5 2. c4 Nc6 3. g3 g6 | ||
| 2024.03.09 | Round 1: Alfaro, William - Valle Alonso, Moises Abraham | 2024.03.09 Valle Alonso, Moises Abraham (6109560) (1971) | 1 | 91.50% | 1. Nf3 Nf6 2. c4 e6 3. g3 d5 | ||
| Ronda 6: Galaviz Valdez, Manuel Antonino - Alfaro, William | 6.5 | Galaviz Valdez, Manuel Antonino (5104564) (2091) | 1 | 95.60% | 1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 | ||
| Ronda 4: Nipita Medina, Jesus Hassan - Alfaro, William | 4.5 | Nipita Medina, Jesus Hassan (5138817) (2053) | 0 | 83.20% | 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 | ||
| Ronda 3: Alfaro, William - Amezcua Luria, Jesus | 3.7 | Amezcua Luria, Jesus (5117682) (1958) | 1 | 97.80% | 1. d4 Nf6 2. c4 e6 3. Nf3 b6 | ||
| Ronda 2: Benitez Lozano, Javier - Alfaro, William | 2.2 | Benitez Lozano, Javier (5102472) (2250) | 0 | 85.70% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 e5 | ||
| Ronda 8: Alfaro, William - Garcia Nevarez, Moises Omar | 8.3 | Garcia Nevarez, Moises Omar (5127270) (2095) | ½ | 95.90% | 1. d4 Nf6 2. Nf3 e6 3. c4 a6 | ||
| Ronda 3: Zacarias Rodriguez, Santiago - Alfaro, William | 3.1 | Zacarias Rodriguez, Santiago (5148367) (2199) | 0 | 83.20% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.11.19 | Round 5: William Alfaro - Sergio Miguel Garcia Funes | 2023.11.19 Sergio Miguel Garcia Funes | ½ | 88.50% | 1. Nf3 d5 2. c4 e6 3. d4 Nf6 | ||
| 2023.11.18 | Round 3: William Alfaro - Ricardo Urbina | 2023.11.18 Ricardo Urbina | 0 | 89.30% | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 | ||
| 2023.11.18 | Round 2: William Alfaro - David Alejandro Cabezas Solano | 2023.11.18 David Alejandro Cabezas Solano | ½ | 96.50% | 1. d4 Nf6 2. Nf3 d5 3. c4 e6 | ||
| 2023.11.18 | Round 1: Daniel Arias - William Alfaro | 2023.11.18 Daniel Arias | * | 80.80% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.09.17 | Round 9: William Alfaro - Carlos Avalos | 2023.09.17 Carlos Avalos | 1 | 92.50% | 1. d4 d6 2. Nf3 Bg4 3. e4 c6 | ||
| 2023.09.17 | Round 8: Carlos Davila - William Alfaro | 2023.09.17 Carlos Davila | ½ | 80.60% | 1. d4 Nf6 2. g3 d5 3. Bg2 c6 | ||
| 2023.09.16 | Round 7: William Alfaro - Enrique Pomares | 2023.09.16 Enrique Pomares | 1 | 87.70% | 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 | ||
| 2023.09.16 | Round 6: Heriberto Ortiz - William Alfaro | 2023.09.16 Heriberto Ortiz | ½ | 88.80% | 1. b3 Nf6 2. Bb2 g6 3. Nf3 Bg7 | ||
| 2023.09.15 | Round 5: William Alfaro - Moises Valle Alonso | 2023.09.15 Moises Valle Alonso | ½ | 96.40% | 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 | ||
| 2023.09.15 | Round 4: Axell Sevilla - William Alfaro | 2023.09.15 Axell Sevilla | ½ | 88.00% | 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 | ||
| 2023.09.14 | Round 2: Antonio Garcia - William Alfaro | 2023.09.14 Antonio Garcia | ½ | 88.80% | 1. c4 Nf6 2. g3 e6 3. Bg2 d5 | ||
| 2023.09.14 | Round 1: William Alfaro - Francisco Ruiz | 2023.09.14 Francisco Ruiz | 1 | 94.30% | 1. d4 c5 2. d5 e6 3. e4 exd5 | ||
| 2023.07.06 | Round 15: William Alfaro - Jorge Ernesto Giron | 2023.07.06 Jorge Ernesto Giron | ½ | 74.20% | 1. e4 c5 2. c3 d5 3. exd5 Qxd5 | ||
| 2023.07.06 | Round 14: Gian Carlo Arvelo Leo - William Alfaro | 2023.07.06 Gian Carlo Arvelo Leo | 1 | 52.20% | 1. Nf3 c5 2. c4 Nc6 3. Nc3 Nf6 | ||
| 2023.07.06 | Round 13: William Alfaro - Luis Ernesto Quesada Perez | 2023.07.06 Luis Ernesto Quesada Perez | 0 | 88.60% | 1. e4 c5 2. d4 cxd4 3. c3 Nf6 | ||
| 2023.07.06 | Round 12: Sergio Duran Vega - William Alfaro | 2023.07.06 Sergio Duran Vega | ½ | 88.10% | 1. d4 Nf6 2. Nf3 g6 3. c4 c5 | ||
| 2023.07.06 | Round 11: William Alfaro - Luis Fernando Ibarra Chami | 2023.07.06 Luis Fernando Ibarra Chami | 0 | 71.30% | 1. e4 c5 2. c3 d5 3. exd5 Nf6 | ||
| 2023.07.06 | Round 10: Miguel A. Boggiano Pereira - William Alfaro | 2023.07.06 Miguel A. Boggiano Pereira | 1 | 95.00% | 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 | ||
| 2023.07.06 | Round 9: William Alfaro - Orlando Andres Leon Archibaldo | 2023.07.06 Orlando Andres Leon Archibaldo | 1 | 80.30% | 1. e4 c5 2. d4 cxd4 3. c3 dxc3 | ||
| 2023.07.06 | Round 8: Angelo Etienne - William Alfaro | 2023.07.06 Angelo Etienne | 0 | 82.90% | 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 | ||
| 2023.07.06 | Round 7: William Alfaro - Martyn Del Castilho | 2023.07.06 Martyn Del Castilho | ½ | 98.70% | 1. d4 d5 2. Nf3 e6 3. c4 a6 | ||
| 2023.07.06 | Round 6: Cyrus Daniel - William Alfaro | 2023.07.06 Cyrus Daniel | 1 | 82.10% | 1. e4 c5 2. Nc3 Nc6 3. f4 g6 | ||
| 2023.07.06 | Round 5: William Alfaro - Alejandro Jose Chinchilla | 2023.07.06 Alejandro Jose Chinchilla | ½ | 77.50% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | ||
| 2023.07.06 | Round 4: Felix Jose Ynojosa Aponte - William Alfaro | 2023.07.06 Felix Jose Ynojosa Aponte | ½ | 90.70% | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | ||
| 2023.07.06 | Round 3: William Alfaro - Jose Gabriel Cardoso Cardoso | 2023.07.06 Jose Gabriel Cardoso Cardoso | 0 | 88.00% | 1. d4 Nf6 2. Nf3 d5 3. c4 e6 | ||
| 2023.07.06 | Round 2: Hayden Lee - William Alfaro | 2023.07.06 Hayden Lee | 1 | 96.80% | 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 | ||
| 2023.07.06 | Round 1: Shreyas Smith - William Alfaro | 2023.07.06 Shreyas Smith | 1 | 86.90% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 | ||
| 2023.07.06 | Round 15: William Alfaro - Shreyas Smith | 2023.07.06 Shreyas Smith | 1 | 87.10% | 1. d4 d5 2. Nf3 e6 3. c4 a6 | ||
| 2023.07.05 | Round 14: Angelo Etienne - William Alfaro | 2023.07.05 Angelo Etienne | 0 | 80.50% | 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 | ||
| 2023.07.05 | Round 13: William Alfaro - Luis Ernesto Quesada Perez | 2023.07.05 Luis Ernesto Quesada Perez | 0 | 89.40% | 1. d4 Nf6 2. Nf3 e6 3. c4 c5 | ||
| 2023.07.05 | Round 12: Hayden Lee - William Alfaro | 2023.07.05 Hayden Lee | 1 | 93.60% | 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 | ||
| 2023.07.05 | Round 11: William Alfaro - Miguel A. Boggiano Pereira | 2023.07.05 Miguel A. Boggiano Pereira | 1 | 92.50% | 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 | ||
| 2023.07.05 | Round 10: Esteban Alb Valderrama Quiceno - William Alfaro | 2023.07.05 Esteban Alb Valderrama Quiceno | 1 | 91.10% | 1. d4 d5 2. c4 e6 3. Nc3 f5 | ||
| 2023.07.04 | Round 9: Sergio Duran Vega - William Alfaro | 2023.07.04 Sergio Duran Vega | ½ | 92.70% | 1. Nf3 c5 2. c4 g6 3. d4 cxd4 | ||
| 2023.07.04 | Round 8: William Alfaro - Alejandro Jose Chinchilla | 2023.07.04 Alejandro Jose Chinchilla | * | 88.80% | 1. e4 c5 2. d4 cxd4 3. c3 dxc3 | ||
| 2023.07.04 | Round 7: Jorge Ernesto Giron - William Alfaro | 2023.07.04 Jorge Ernesto Giron | 0 | 89.50% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | ||
| 2023.07.04 | Round 6: William Alfaro - Orlando Andres Leon Archibaldo | 2023.07.04 Orlando Andres Leon Archibaldo | ½ | 23.20% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | ||
| 2023.07.04 | Round 5: Martyn Del Castilho - William Alfaro | 2023.07.04 Martyn Del Castilho | ½ | 70.60% | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | ||
| 2023.07.03 | Round 4: William Alfaro - Luis Fernando Ibarra Chami | 2023.07.03 Luis Fernando Ibarra Chami | 0 | 88.90% | 1. e4 c5 2. c3 d5 3. exd5 Nf6 | ||
| 2023.07.03 | Round 3: Gian Carlo Arvelo Leo - William Alfaro | 2023.07.03 Gian Carlo Arvelo Leo | ½ | 92.20% | 1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 | ||
| 2023.07.03 | Round 2: William Alfaro - Felix Jose Ynojosa Aponte | 2023.07.03 Felix Jose Ynojosa Aponte | 0 | 89.60% | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | ||
| 2023.07.03 | Round 1: Cyrus Daniel - William Alfaro | 2023.07.03 Cyrus Daniel | 1 | 92.60% | 1. e4 c5 2. Nc3 Nc6 3. f4 g6 |