USA-05.Kongress playoff-1pl
New York 1880
| Date | Players | Type | Elo Average | Games | Rounds |
| Jan 06, 1880 | 2 | Match | 2 | 2 |
| Name | ELO | Points | ||
| Mackenzie, George Henry | 2.0 | |||
| Grundy, James Glover | 0.0 | |||
USA-05.Kongress playoff-1pl Games
| White | Black | Result | Round | Date | Opening | View |
| Mackenzie, G | Grundy, J | 1-0  |
1 | Jan 31, 1880 | C46 Three knights game |   |
| Grundy, J | Mackenzie, G | 0-1 |
2 | Jan 31, 1880 | C65 Ruy Lopez, Berlin defence |   |