Here is what
The Blue Alliance Match Archive System says. If there is enough demand, I will make all of these also link to their respective matches.
The highest scoring decided-by-one match was
Archimedes QF4-1, 82-81.
Code:
name matchname red blue
NASA - VCU Regional Qualification 82 20 21
NASA - VCU Regional Quarters 1 Match 1 15 16
Pacific Northwest Semis 2 Match 1 62 61
Florida Regional Qualification 36 23 22
Wisconsin Regional Finals 1 Match 2 60 61
Bayou Regional Qualification 10 17 16
Bayou Regional Qualification 21 15 16
Bayou Regional Qualification 44 15 16
Bayou Regional Quarter 3 Match 2 16 15
Pittsburgh Regional Qualification 48 16 15
UTC New England Qualification 13 31 32
Boilermaker Regional Qualification 40 36 35
Chesapeake Regional Qualification 24 49 48
Chesapeake Regional Qualification 45 15 16
Chesapeake Regional Qualification 63 4 5
Midwest Regional Qualification 14 22 21
Boston Regional Qualification 18 49 50
Boston Regional Qualification 25 31 30
Boston Regional Qualification 52 17 16
Waterloo Regional Quarter 2 Match 2 27 28
San Diego Regional Qualification 24 22 23
San Diego Regional Qualification 74 65 66
Silicon Valley Regional Qualification 4 17 16
Galileo Field Qualification 81 36 37
Curie Field Qualification 10 46 45
Curie Field Qualification 29 60 59
Newton Field Qualification 28 29 30
Israel Regional Qualification 42 20 19
Colorado Regional Semis 2 Match 2 76 77
Las Vegas Regional Qualification 26 9 10
Palmetto Regional Qualification 38 20 19
Philadelphia Regional Qualification 20 31 30
Philadelphia Regional Qualification 44 24 23
Sacramento Regional Qualification 29 4 5
Sacramento Regional Qualification 43 50 51
Lone Star Regional Qualification 13 6 7
Lone Star Regional Qualification 80 16 17
Lone Star Regional Semis 2 Match 1 20 19
Midwest Regional Qualification 5 45 44
Wisconsin Regional Qualification 41 27 28
Archimedes Quarters 4 Match 1 82 81
Sorry, I can't get the forums to make these columns nicely. They are all clean in my notepad document.