Official NHA Assessment
Race 4: MWOS VIRTUALS CLASSIFIED STAKES (For horses with nett rating of 71 and below)
Line Horse
Zazu
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
2 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Bruce's Spirit 6 60.0 1 0.00 0.0 68 73 73 +5 2 Zazu 6 56.5 2 3.00 0.0 69 69 69 +0 3 Deposition 6 58.0 3 4.25 0.0 67 71 71 +4 4 Coffeeberry 5 54.5 4 9.25 0.0 75 62 65 -10 5 Queen Of Dallas 3 50.0 5 23.25 5.0 45 43 43 -2 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Bruce's Spirit | 68 | 55 | 73 | -18 | 0.0 | - | |
| 2 | Zazu Line | 69 | 71 | 69 | +2 | 0.0 | ||
| 3 | Deposition | 67 | 68 | 71 | -3 | 0.0 | - | |
| 4 | Coffeeberry | 75 | 72 | 65 | +7 | 0.0 | - | |
| 5 | Queen Of Dallas | 45 | 40 | 43 | -3 | 5.0 | - |
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