The SIMDEX™ | Fair Golf Simulator Handicaps

The USGA Built Slope & Rating. We Built SIMDEX™ — the Handicap & Normalization Standard for Indoor Golf.

Outdoor raw scores don't lie, but indoor raw scores do. An 8-foot auto-gimmie on Trackman is not the same as manual putting on Uneekor. The SIMDEX™ mathematically normalizes putting radiuses, launch physics, and engine biases into one verified, dispute-free leaderboard.

0 Friction

Extracted automatically via camera OCR at Hole 18

100% Hardware Neutral

Works across Trackman, Uneekor, Foresight & GSPro

Anti-Sandbagging

Dynamic rolling 4-of-8 indoor round index

Try it: same round, different bays.

1. Select Hardware Engine

2. Select Putting Setting

3. Raw Gross Score Shot — 68

4. Course Par

Normalized Sim-Differential

69.8

Raw Gross Score68 (-4)

Putting Value Delta (EPV)+2.4 Strokes

8-ft circle make-rate bonus removed

Hardware / Lie Physics Bias−0.6 Strokes

Engine rough penalty offset applied

Why This Matters

On the PGA Tour, pros make only 52% of 8-footers. A gimmie circle gives amateurs a 100% make rate. SimLeague's EPV model adjusts this 68 on Trackman 4 to a fair 69.8 differential so it competes evenly against a 70 shot on manual putting.

1. Expected Putting Value (EPV) Curve

Tour and amateur make-rates fall off fast with distance. Simulators with auto-gimmie circles assume a 100% make inside the radius — the EPV curve adds those free strokes back.

4 ft

88%

6 ft

68%

8 ft

52%

10 ft

40%

■ Tour make-rate ■ Sim auto-make (100%)

2. Cross-Hardware Physics Calibration

Every launch engine handles turf rollout, wind resistance and rough penalties differently. SimLeague uses aggregate multi-bay round telemetry to assign a difficulty calibration factor to each engine.

Diff = Gross + EPV + M_engine

3. The Dynamic Indoor Soft Cap

Outdoor GHIN handicaps fail indoors: no lost balls, no tree trouble, a flat stance on every swing. The SIMDEX™ takes the best 4 of your last 8 indoor rounds × 0.96, and soft-caps instantly when an outdoor 12-handicap shoots back-to-back 66s.

Index = avg(best 4 of 8) × 0.96