Tournament difficulty
British Parliamentary tournaments ranked by the empirical strength of the field that showed up. View our methodology here.
Updated 10 hours ago
May 2021 to May 2026
TournamentStrength
#1
LSE Open 2023
2023-02 · 70 teams
2.06
#2
Imperial IV 2025
2025-07 · 33 teams
1.48
#3
Doxbridge 4: Modern Warfare
2022-11 · 189 teams
1.41
#4
KCL Open 2021
2021-06 · 91 teams
1.29
#5
Madrid WUDC 2023
2022-12 · 262 teams
1.18
#6
Imperial IV 2022
2022-07 · 118 teams
1.13
#7
LSE OPEN 2024
2024-02 · 83 teams
1.09
#8
Bulgaria WUDC 2026
2025-12 · 337 teams
1.06
#9
Glasgow Summer Cup 2024
2024-07 · 69 teams
1.04
#10
Cambridge IV 2024
2024-11 · 86 teams
1.04
#11
pre-WUDC Vienna Online Open
2024-12 · 133 teams
1.03
#12
Princeton IV 2023
2023-08 · 167 teams
1.03
#13
Princeton IV 2024
2024-09 · 142 teams
1.03
#14
Vietnam WUDC 2024
2023-12 · 300 teams
1.00
#15
Princeton IV 2021
2021-06 · 143 teams
0.99
#16
UCLA IV 2025
2025-09 · 97 teams
0.96
#17
Princeton IV 2025
2025-09 · 138 teams
0.92
#18
Hart House Winter Open 2026
2026-01 · 52 teams
0.90
#19
Panama WUDC 2025
2024-12 · 228 teams
0.83
#20
GME Pra-KDMI 2025
2025-04 · 28 teams
0.77
#21
Oxford IV 2024
2024-11 · 115 teams
0.76
#22
Vienna Pre-EUDC 2024
2024-06 · 115 teams
0.75
#23
Doxbridge 3: Return of the King
2021-11 · 162 teams
0.72
#24
Diliman IV 2024
2024-12 · 66 teams
0.70
#25
Johns Hopkins Open 2022
2022-07 · 95 teams
0.68
#26
Sofia Online Open Part 2
2024-05 · 134 teams
0.64
#27
IV SULBR
2025-02 · 36 teams
0.60
#28
Untitled Preparation Competition for the 2023 European University Debating Championships
2023-06 · 64 teams
0.60
#29
Cambridge IV 2025
2025-11 · 93 teams
0.58
#30
Black Sea European Universites Debating Championships 2023
2023-08 · 160 teams
0.56
#31
Oxford IV 2022
2022-11 · 117 teams
0.56
#32
SMVIT Parliamentary Debate 3.0 pre-WUDC
2025-12 · 63 teams
0.55
#33
NAUDC 2026
2026-03 · 81 teams
0.54
#34
MKDS Open 2026
2026-03 · 26 teams
0.53
#35
North American University Debating Championships 2025
2025-03 · 114 teams
0.52
#36
Glasgow EUDC 2024
2024-07 · 185 teams
0.51
#37
NAUDC 2024
2024-03 · 79 teams
0.49
#38
Doxbridge Pre-WUDC 2022: So Long, and Thanks for All The Fish
2022-06 · 180 teams
0.46
#39
Delhi Debate 2025
2025-08 · 48 teams
0.43
#40
Yale IV Fall 2021
2021-12 · 134 teams
0.39
#41
St Andrews Pre-EUDC Pt.1
2026-04 · 47 teams
0.37
#42
Oxford IV 2025
2025-11 · 134 teams
0.34
#43
Pre-WUDC Vienna Online Open 2025
2025-12 · 164 teams
0.31
#44
DTU Pre-Worlds 2025
2025-11 · 58 teams
0.27
#45
Sofia Pre-EUDC 2023
2023-08 · 61 teams
0.26
#46
LSE Open 2022
2022-04 · 90 teams
0.25
#47
Pre-WUDC Vienna Online Open
2022-12 · 122 teams
0.23
#48
Belgrade WUDC 2022
2022-07 · 379 teams
0.20
#49
Drexel Pre-WUDC 2025
2025-08 · 51 teams
0.15
#50
Durham IV 2024
2024-11 · 45 teams
0.15
#51
RCL PD 2025
2025-12 · 64 teams
0.08
#52
Yale IV 2022
2022-10 · 121 teams
0.08
#53
Penn Pre-WUDC 2024
2024-11 · 88 teams
0.06
#54
McGill NAUDC 2021
2022-02 · 80 teams
0.03
#55
Copenhagen EUDC 2025
2025-08 · 183 teams
0.03
#56
NAUDC 2023
2023-04 · 83 teams
0.02
#57
2nd Charcha British Parliamentary Debate 2026
2026-03 · 46 teams
0.00
#58
Budapest Pre-EUDC Fundraiser 2025
2025-06 · 33 teams
0.00
#59
IIT Madras Parliamentary Debate 2026
2026-02 · 51 teams
-0.00
#60
Norwich 26
2026-03 · 25 teams
-0.00
#61
Queens Holiday Open 2025
2025-12 · 92 teams
-0.03
#62
Uhuru Worlds 2025
2025-06 · 496 teams
-0.05
#63
Durham IV 2025
2025-11 · 48 teams
-0.05
#64
People Speak 2026
2026-01 · 84 teams
-0.08
#65
Uhuru Worlds 2024
2024-06 · 484 teams
-0.09
#66
GO 2026
2026-03 · 24 teams
-0.12
#67
SEF ITB Pro Ams 2026
2026-03 · 77 teams
-0.12
#68
Western IV 2022
2022-06 · 104 teams
-0.14
#69
Drexel Debate Open 2024
2024-06 · 48 teams
-0.14
#70
RCL PD 2024
2024-08 · 61 teams
-0.15
#71
Roberto Farina Solidário
2025-01 · 35 teams
-0.17
#72
Xth NUALS Parliamentary Debate 2026
2026-03 · 41 teams
-0.22
#73
Delhi Debate 2024
2024-07 · 88 teams
-0.23
#74
Berkeley IV 2024
2024-06 · 68 teams
-0.24
#75
University of Southern California IV 2025
2025-02 · 56 teams
-0.28
#76
Hart House IV 2024
2024-10 · 102 teams
-0.28
#77
Yale IV 2023
2023-10 · 103 teams
-0.28
#78
NUDC 2025
2025-10 · 97 teams
-0.30
#79
Technion Open 2023
2023-11 · 58 teams
-0.30
#80
Hart House Autumn Split 2025
2025-11 · 64 teams
-0.30
#81
IITKGP PD 2026
2026-02 · 65 teams
-0.31
#82
Winter Debate Symposium 2025
2025-01 · 69 teams
-0.32
#83
Amsterdam Open 2025
2025-12 · 75 teams
-0.35
#84
Yale IV 2024
2024-11 · 140 teams
-0.35
#85
Gurgaon Online Open 2026
2026-02 · 33 teams
-0.37
#86
Bali Asian British Parliamentary 2022
2023-01 · 86 teams
-0.37
#87
14th NALSAR Debating Championship 2024
2024-09 · 92 teams
-0.38
#88
16th IIT Bombay Debate
2023-10 · 120 teams
-0.38
#89
Motilal Nehru British Parliamentary Debate 2025
2025-06 · 92 teams
-0.39
#90
NUDC 2024
2024-05 · 114 teams
-0.39
#91
Curtin Debate Open 2025
2025-11 · 45 teams
-0.39
#92
Indo-Pacific Pro-AM 2024
2024-07 · 44 teams
-0.41
#93
East Malaysia Open 2024
2024-08 · 98 teams
-0.44
#94
Colgate Open 2023
2023-03 · 28 teams
-0.44
#95
NEO Universitas Riau 2025
2025-04 · 17 teams
-0.46
#96
15th NALSAR Debating Championship 2025
2025-09 · 133 teams
-0.50
#97
Ridge '25
2025-05 · 39 teams
-0.50
#98
Filibuster Parliamentary Debate 2026
2026-04 · 58 teams
-0.50
#99
Seattle IV Online Pre-WUDC 2025
2025-12 · 46 teams
-0.51
#100
RV Debating 2021
2021-06 · 87 teams
-0.52
#101
Durham IV 2023
2023-11 · 34 teams
-0.53
#102
Padjajaran Debate Open 2025
2025-11 · 28 teams
-0.56
#103
passover open 2026
2026-03 · 20 teams
-0.56
#104
Krabi ABP 2024
2024-10 · 80 teams
-0.58
#105
YODL Champs April 2025
2025-03 · 64 teams
-0.67
#106
HUDC 2023
2023-06 · 42 teams
-0.67
#107
Indian Debate Open 2024
2024-07 · 39 teams
-0.68
#108
Colgate Open 2024
2024-03 · 21 teams
-0.69
#109
SLDC 2025
2025-11 · 37 teams
-0.70
#110
Seattle IV 2023
2023-06 · 65 teams
-0.74
#111
Hart House IV 2022
2022-10 · 77 teams
-0.76
#112
USC IV 2021
2021-06 · 69 teams
-0.77
#113
Hart House IV 2023
2023-10 · 86 teams
-0.79
#114
9th VUBP
2026-02 · 40 teams
-0.80
#115
Tournament
2026-02 · 48 teams
-0.82
#116
NMIMS IV 2026
2026-03 · 40 teams
-0.84
#117
SLS PD 2026
2026-02 · 55 teams
-0.85
#118
Challenger
2025-07 · 58 teams
-0.87
#119
17th IIT Bombay Debate
2024-10 · 121 teams
-0.89
#120
II TND 25 Brasil
2025-11 · 60 teams
-0.91
#121
North American Novices 2021
2021-06 · 58 teams
-1.09
#122
Shanghai (SIDO) Hanoi ABP 2021
2021-10 · 193 teams
-1.17
#123
Summer Debate Symposium 2025
2025-07 · 78 teams
-1.22
#124
USC IV 2026
2026-04 · 37 teams
-1.23
#125
IITK PD'26
2026-03 · 37 teams
-1.29
#126
FAST IV 2025
2025-04 · 36 teams
-1.43
#127
Random Pro-Am IV: The Kneppers Invitational
2022-04 · 67 teams
-1.50
#128
IDS Northeast Asian Debating Championships 2022
2022-11 · 127 teams
-1.54
#129
VNDC 2025
2025-10 · 69 teams
-1.55
#130
Seattle Classic 2025
2025-03 · 21 teams
-1.56
#131
Colgate Open 2021
2021-06 · 88 teams
-1.56
#132
NUDC Untan 2026
2026-04 · 20 teams
-1.68
#133
Seattle IV 2024 YODL
2024-06 · 59 teams
-1.79
#134
Northeast Asia Championship British Parliamentary 2023
2023-10 · 40 teams
-2.05
#135
Sheffield 26
2026-05 · 16 teams
-2.23
#136
QMUL Open 2026
2026-02 · 51 teams
-2.38
Round robins
Round robins are curated invitationals — typically 16 of the world's best teams playing every other team across the prelims with no power-pairing. The bubble-path metric used in the main ranking doesn't apply (opponent strength is uniform across the field), so they're shown here separately. By raw field strength these are the most competitive tabs on the calendar to break at.
#1
HWS Round Robin 2025
2025-04 · 16 teams
4.00
#2
HWS Round Robin 2022
2022-04 · 16 teams
3.68
#3
HWS Round Robin 2023
2023-04 · 16 teams
3.38
#4
HWS Round Robin 2024
2024-04 · 28 teams
2.42
#5
ILNU Round Robin 2026
2026-04 · 16 teams
1.72