Score progression
Sample report
BWF World Championships 2026
New Delhi, India
DEMO / prototype
not this 21–19 · not BWF Worlds
Ridge Shuttle Academy
Koramangala, Bengaluru · week of 18–24 Aug 2026
Highlighted Moments
Clip missing for this beat — not a substitute video.
Point share
Shot mix
What he did well
Keep this
What almost cost it
Why it was close
Physical Story
~28 cmjump · ESTIMATED
~11°shoulder · ESTIMATED
−333 / −133 mswhip · 2D
Ayush Shetty
— m/sShi Yu Qi
— m/sShuttle speed
Footwork
1st half NEAR → 2nd half FAR
1st half FAR → 2nd half NEAR
Darker = more time on that spot
Least time
Moderate
Most time
Movement speed
Shetty
Shi
deltaplay · 2D biomech study
Broadcast pose study
ESTIMATED
Hypothesis: on both named contacts the smash is a timed whip — hip, then shoulder, then elbow, then wrist — not one arm heave. Method: one broadcast camera, 2D joints from the YOLO+RF-DETR cache, 03:06–03:36 / 186–216s PRE-switch. Markerless here means we read the picture. It is not a lab.
jump lift · Shetty 3:09.7
~28 cm
ESTIMATED · court-plane / this camera
shoulder at plant
~11°
ESTIMATED · vs horizontal · this camera
kinetic chain
−333 / −133 ms
hip·shoulder / arm · 2D peak timing
3D-from-one-cam
Mid-hip image-y vs pre-plant baseline ÷ local court-width scale at feet. Shoulder-line vs image horizontal. Same whip ms. Not force-plate Vert, not 3D IR, not °/s.
-
1
Broadcast
One camera, this Game 3 clip. Everyday kit. No markers, no wand, no capture volume.
-
2
Detect 2D
shetty_shi_g3_detections.json.gz· 7426 frames · identity remap at 218s. COCO-style joints on the image. -
3
Time the chain
Peak 2D joint speed around plant / jump-smash. Hip → shoulder → elbow → wrist. Projection-biased. Not °/s.
compare · same 30s window
Shetty 3:09.7 · Shi 3:33.9
ESTIMATED
Shetty · plant-pause · near
- Whip order
- hip · shoulder → elbow · wrist
- Peaks vs contact
- hip/shoulder −333 ms · arm −133 ms
- Trunk wind-up
- 29.2° at −267 ms · 10.2° at plant
- Elbow / knee
- 114° / 128° · 2D on that frame
Shi · jump smash · far
- Whip order
- hip · shoulder → elbow · wrist
- Peaks vs contact
- hip −200 ms · arm +66 ms
- Trunk wind-up
- 7.0° at −467 ms · −4.3° at contact
- Elbow / knee
- 74° / 135° · 2D on that frame
Same cache, same window. Degrees are image-plane proxies — not 3D X-factor, not lab IR. Do not rank raw jump lift across the net: Shetty is near.
what we track
- 17 COCO-style 2D joints
- Hip → shoulder → elbow → wrist peak timing
- Trunk sep (shoulder-line vs hip-line yaw)
- Jump lift (image-y hip / COM)
- Feet court-plane km/h
what we do not
- Multi-cam Theia3D / 124 keypoints / IK
- Lab angular velocity in °/s
- Shoulder internal rotation
- OpenCap musculoskeletal force
.c3dexport · Snap Score · Hawk-Eye
Kinetic chain
hip → shoulder → elbow → wrist · 2D peak timing
Shetty · 3:09.7
Shi · 3:33.9
2D peak timing · hip/shoulder can share a frame · not °/s · not lab kinematics
YOLO+RF-DETR cache · 186–216s PRE-switchtiming story, not °/s
Trunk rotation
2D shoulder-line / hip-line yaw · not X-factor
Shetty sep
Shi sep
jump lift
2D proxy · not 3D X-factor
2D proxy · 8 Hz tracesnot 3D X-factor
The Snap
named freeze-frame · no Snap Score
Shi airborne · 3:33.9 · TrackNet 2D glowno Snap Score · IR not isolated
Jump vs feet
hip-lift proxy · court-plane km/h
The jump is a hip lifting on the image. The feet stay a court-plane km/h story — same live overlay recipe, not a force plate.
Shetty
Shi
solid = jump lift · dashed = feet km/h
Jump proxy is not metres of height. Feet km/h is court-plane from the existing cache, ESTIMATED at live overlay grain. Teal is always Shetty.
Same 30s windowproxy, not lab jump
Moment cards
03:06–03:36 · 2D pose · tap to seek
Body ↔ points
Feet MEASURED · joints ESTIMATED · point ties INFERRED
this Game 3 · from a real moment
What to work on next
Kill a five-straight faster
Start 17–6 · never gift five
Start 17–6. Never concede five in a row while leading by 11. Repeat ×5.
Protect the opening burst
Start 3–3 · take the next three
Start mini-games at 3–3. Win the next 3 of 4 before leaving. Repeat ×5.
Kill the five, then protect 3–3. Matching clips are on Film.
Score-tied Pulse drills on this Game 3 board. Visual court cards kept. BWF Coach Education (open kinetic chain) · King et al. 2020 (jump smash lab — not this camera).
BWF framework
· Coaching Framework PDF
· CE pathway Aug 2026
· King 2020
this Game 3 · landing layouts, not landing numbers
Coach scan
ESTIMATED art
MEASURED feet
Same card language as the cream landing — dark Amicro, this 21–19 only. Karthik / Kavya / 17.4 km/h stay on the demo site.
Attack chain · load transfer
03:06–03:36 · 2D peak timing · not Grade A
Hip → shoulder → elbow → wrist. Same whip as Kinetic chain above. We time plant-pauses on this camera. We do not invent 4.2 rad/s or “2 of 7 attacking shots.”
Plant-pauses—
Order holds—
Window30s
Landing illustration · 2D poseESTIMATED timing
Recovery · court load
L/R is court-x · not left-leg 54%
Shetty 49 / 51 left–right on court. Even. The landing’s BH lunge −6% is not this pack. This 30s: Shetty 62 m vs Shi 78 m.
L court49%
R court51%
After 118.4
L/R MEASURED · 30s metres MEASUREDavg km/h after 11
Biomechanics in 3D
Every shot rebuilt as a moving 3D body, measured through move, load, contact and recovery.
Ayush Shetty, one Game 3 rally (from 3:05), rebuilt in 3D from the broadcast camera.
Overhead, back court
Shetty's overhead from the back court: racket arm, knees, trunk and twist through the whole shot, contact marked.
Elbow at contact118°
Knee at contact117°
Trunk at contact5°
Deep lunge, back court
Shetty at full stretch to dig a low shuttle out of the back court: how low he gets and how the arm reaches.
Elbow at contact157°
Knee at contact51°
Trunk at contact75°
Joint angles, both players
See-through bodies with the skeleton inside. Elbow, knee and trunk angles, every frame.
PlayersBoth
Rate30 per second
AnglesElbow · knee · trunk
Footwork from above
Every foot plant stamped on the court, and how far each player is from base.
Per playerFoot plants
LiveDistance from base
RallyMetres run
One match. A clearer picture.
This sample shows how deltaplay turns match data into insights for coaches. Imagine the same perspective on your own athletes.
Sample report · Includes measured, estimated, and illustrative content, as labeled.
Shi Yu Qi · coaching plates, not this rally
Shi Yu Qi · tight net kill
Contact+12 cm
Wrist vel.3.4 m/s
Stance0.68 m
Shi Yu Qi · recovery to T
First step0.94 m
Split16 cm
Time to T0.38 s
This match board
Game 3 · two players · not a weekly academy roster
Coverage = occupancy bins with a foot sample (8×14 grid, GPU cache, remap 218s). Not landing 100% / 48%. Avg km/h is full-game court-plane — slot spikes ~43 unused. A weekly academy hub would list many athletes; this file does not.
7426 frames · 218s remapShetty + Shi only
Occupancy split
this Game 3 · far / near · not Mon–Sun
Identity remapped at 218s. Shetty more samples far (after switch). Shi more near. Same bar language as the academy week chart — different data.
n_far / n_near from occupancy matrixnot court hours
Shetty vs Shi
this Game 3 · not vs elite U-17
Shetty
Shi
no pro reference ring
Axes we have: metres, avg km/h, points, cell coverage, longest run. Dummy “U-17 elite BWF” spider from the landing is not drawn.
Pack + occupancythis 21–19
one-camera body read · 03:06–03:36
Practice glimpse
ESTIMATED
Same 30s rally as Physical Story. Three short annotated beats — not a 30-film library. Skeleton plus hip-line / shoulder-line on the picture, then a metric stack: hip sway · shoulder turn · trunk. Inspired by a student swing-review layout. Not a golf clone.
One-camera body read
Shetty 3:09.7 · Snap · Shi 3:33.9 · PRE-switch
live stack · this camera
Hip sway is 2D hip-mid minus ankle-mid on the same frame (else foot_px), scaled by local court-width ppm. Shoulder turn is the shoulder-line vs image horizontal. Trunk is shoulder-line yaw minus hip-line yaw. Teal is Shetty. Magenta is Shi. Switch at 218s is unused.
cache · 186–216s · ffmpeg overlaynot 3D lab
technique focus · illustrative
Where the movement happens
ILLUSTRATIVE
Example technique visuals showing the parts of the game we coach toward. Photo is this Game 3 clip. Arrows, X, pocket and T are coaching overlays — not measured on this rally, not 142°.
The lunge
Reaching low and wide, then recovering fast to centre.
The smash
Explosive jump and rotation.
The recovery
Resetting to T / centre between shots.
Photo: this Game 3 clip. Arrows / X / pocket / T are coaching — illustrative, not measured 142°. Not Ridge academy stills.
Example academy view — sample data. 3 coaches, 11 athletes. This is what your weekly academy dashboard looks like; these are not real students. The Overview tab is the real 21–19 match. Every figure here is DEMO.
Weekly group energy DEMO
7 candles this week
Open-high-low-close as group energy. Same candle grammar as Mono Charts — recreated here, no Mono tab required.
Sample data — not real students.
OHLCAcademy energy
Four-week series DEMO
4 weekly candles
W1–W4 close climbs 52 → 65. Last week is the 7-day chart to the left.
OHLCMonth
Neha group DEMO
8 sessions
U-19 / Open4 athletes
Vikram group DEMO
7 sessions
U-15 pathway4 athletes
Arjun group DEMO
4 sessions
U-13 foundations3 athletes
Coach → students DEMO
11 / 3 athletes · coaches
One coach, many kids. Ribbon thickness follows this-week coverage. Hover a band for name + last-week Δ. Not serve-hold.
Sample data — not real students.
Coach → athleteBezier flow
Leaderboard this week DEMO
Coverage peak km/h · rallies
| # | Athlete | Coach | Coverage | Peak km/h | Rallies | Δ cov |
|---|
Sorted by this-week cell coverage. Sample data — not real students.
Delta Report
Week-over-week coverage · peak · rallies
How much each student moved vs last week. Sparkline is a 4-week coverage series (W1→W4). Before/after is last week → this week.
Sample data — not real students.not this 21–19
Watch
Player dock
Pick a moment, chapter, or run
Chapters
score journeys
Big runs
Point by point
All / Early / Hole
| Pt | Journey | Board | Server | Won | Conf |
|---|
occupancy
occupancy
Skeleton hero
Feet QC
spread_ok t≈90s
Left / right load MEASURED
time on court x
Ankles used as feetL/R distinguishable as x
Knee flexion range ESTIMATED
p10–p90 2D pose
not millimetres
Jump / lunge proxy WIP
pixel peaks not jump height
This camera onlyWIP / ESTIMATED
Trunk lean ESTIMATED
median ° shoulder–hip vs vertical
— median · 2D
Not recovery stepsESTIMATED
Still court
High cam
Still omitted
No TrackNet this folder
No shuttle landing scatter. No invented court-thirds / shot-mix. Those stay DEMO on Mono Charts.
Smash and recovery cards live on Overview → What to work on next (Pulse drills from this board). This tab stays the three score-shape games — not a second drill list.
What to work on
this clip
Method
Grok vision never Gemini
Hero figures are stylized character portraits from stills — not broadcast video frames, not smash meshes.
This file does not overwrite coach_report.html.
Amicro chromeOutfit + SVG