Official NHA Assessment
Race 2: CELEBRATING CENTURION MEMBER GAYNOR RUPERT'S BIRTHDAY MAIDEN PLATE (For all Maidens)
Line Horse
Rafa Bay
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
0 / 13
Within 2 points
Significant Diffs
10 / 13
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Diablo 2 60.0 1 0.00 0.0 80 80 80 +0 2 Real Stunner 3 60.0 2 0.05 7.0 - 66 66 +66 3 Thomas Jenkins 3 60.0 3 2.30 7.0 - 68 68 +68 4 Rafa Bay 2 60.0 4 2.60 0.0 82 82 82 +0 5 Master Bomber 3 60.0 5 3.00 7.0 - 68 68 +68 6 Grand Allegro 3 60.0 6 5.25 7.0 82 66 72 -10 7 Count William 3 60.0 7 5.75 7.0 - 66 66 +66 8 Heemstede 3 60.0 8 6.15 7.0 - 66 66 +66 9 Amandla Ngawethu 3 60.0 9 6.45 7.0 - 66 66 +66 10 District Master 3 60.0 10 7.20 7.0 - 66 66 +66 11 Tripping Thunder 3 60.0 11 8.95 7.0 - 66 66 +66 12 Greenlight Jet 3 60.0 12 11.20 7.0 - 66 66 +66 13 World Soprano 2 60.0 13 13.20 0.0 64 80 80 +16 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Diablo | 80 | 76 | 80 | -4 | 0.0 | - | |
| 2 | Real Stunner | - | 74 | 66 | +8 | 7.0 | - | |
| 3 | Thomas Jenkins | - | 76 | 68 | +8 | 7.0 | - | |
| 4 | Rafa Bay Line | 82 | 96 | 82 | +14 | 0.0 | ||
| 5 | Master Bomber | - | 71 | 68 | +3 | 7.0 | - | |
| 6 | Grand Allegro | 82 | 62 | 72 | -10 | 7.0 | - | |
| 7 | Count William | - | 71 | 66 | +5 | 7.0 | - | |
| 8 | Heemstede | - | 89 | 66 | +23 | 7.0 | - | |
| 9 | Amandla Ngawethu | - | 72 | 66 | +6 | 7.0 | - | |
| 10 | District Master | - | 73 | 66 | +7 | 7.0 | - | |
| 11 | Tripping Thunder | - | 85 | 66 | +19 | 7.0 | - | |
| 12 | Greenlight Jet | - | 44 | 66 | -22 | 7.0 | - | |
| 13 | World Soprano | 64 | 65 | 80 | -15 | 0.0 | - |
Assessment Methodology
Calculation Steps:
- Identify Line Horse - consistent performer used as reference
- Calculate WFA Allowance based on age, distance, and month
- Apply Drag Adjustment for beaten margin
- Calculate Actual Weight Performance:
Weight - Drag - WFA - Compare to Line Horse to determine race rating
- Apply special rules (maiden caps, layoff allowance)
Key Formulas:
- Drag Effect: Varies by distance (see Benchmarks page)
- 1 length ≈ 1kg at 1 mile (1600m)
- WFA Scale: Based on Admiral Rous's 1855 table
- Rating Points: 1kg = 2 rating points