Umpiring Science
Decision-making, technology & the laws
Behind every raised finger sits visual processing, probability and the modern technology stack.
Learning path
- 1Lesson 1
Umpire Signals
The visual vocabulary.
4 min - 2Lesson 2
The LBW Decision Tree
Pitching, impact, hitting — in that order.
6 min - 3Lesson 3
Judging Wides
Different rules by format.
4 min - 4Lesson 4
No-Balls, Front-Foot Cameras & Free Hits
The most-missed decision in cricket.
5 min - 5Lesson 5
Dead Ball Calls
When play stops.
3 min - 6Lesson 6
Boundary Catch Adjudication
Clean catch and the rope.
4 min - 7Lesson 7
Soft Signals & Boundary Catches
Why on-field umpires still matter.
5 min - 8Lesson 8
How DRS Technology Works
Hawk-Eye, UltraEdge, ball-tracking margins.
7 min - 9Lesson 9
Hawk-Eye Ball Tracking
6–10 cameras at 340 fps.
5 min - 10Lesson 10
UltraEdge & Snickometer
Audio + visual edge detection.
4 min - 11Lesson 11
Snicko, Hot Spot & Conflicting Tech
What happens when the technologies disagree.
6 min - 12Lesson 12
Hot Spot
Infrared friction detection.
4 min - 13Lesson 13
DRS Protocol & Strategy
Two/three reviews per innings.
5 min - 14Lesson 14
Captaincy & DRS Strategy
Two reviews, 80 overs — spend them wisely.
6 min - 15Lesson 15
Run-Out at Non-Striker's End (Mankad)
Legal but contested.
4 min - 16Lesson 16
Concussion Substitute Protocol
Player welfare first.
4 min - 17Lesson 17
Over Rates & Time-Wasting
Penalties for slow play.
4 min - 18Lesson 18
Mankading — The Full Rule & History
From Vinoo Mankad to Deepti Sharma.
5 min - 19Lesson 19
DRS Deep Dive — Every Stage Explained
Player review, third umpire, protocols.
7 min - 20Lesson 20
UltraEdge — How It Works
Sound spikes synced to slow-motion video.
5 min - 21Lesson 21
Snickometer — Classic Snicko
The original edge-detection tool.
4 min