Official NHA Assessment
Race 4: COMPUTAFORM MR 66 HANDICAP (Open)
Line Horse
Mercer Girl
Reference for assessment
Exact Matches
0 / 17
Calculated = Official
Close Matches
2 / 17
Within 2 points
Significant Diffs
13 / 17
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Feather The Nest 4 58.0 1 0.00 6.0 62 58 62 +0 2 Twice As Splendid 3 59.5 2 0.50 5.0 72 63 63 -9 3 Princess Queen 3 56.5 3 2.00 5.0 66 57 57 -9 4 Mercer Girl 6 53.5 4 2.25 0.0 61 61 61 +0 5 Allez Les Bleu (AUS 6 57.0 5 2.30 0.0 60 68 68 +8 6 Samoa 10 60.5 6 2.35 0.0 67 75 75 +8 7 Silly Fella 4 55.0 7 3.25 6.0 56 52 52 -4 8 Lulu's Boy 5 60.0 8 5.00 0.0 66 74 74 +8 9 True Brit 3 58.0 9 5.50 5.0 69 60 60 -9 10 Volluto 3 59.0 10 6.00 5.0 71 62 62 -9 11 Life Goes On 7 60.5 11 6.25 0.0 67 75 75 +8 12 Meteoric 3 59.0 12 8.75 5.0 71 62 62 -9 13 Soweto Rose 3 58.0 13 10.75 5.0 69 60 60 -9 14 Bangor Night 5 52.0 14 17.00 0.0 49 58 58 +9 99 Blue Eyes 4 60.5 99 0.00 6.0 - 63 63 +0 99 Space Race 4 60.5 99 0.00 6.0 - 63 63 +0 99 Rozara 3 61.0 99 0.00 5.0 - 66 66 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Feather The Nest | 62 | 54 | 62 | -8 | 6.0 | - | |
| 2 | Twice As Splendid | 72 | 81 | 63 | +18 | 5.0 | - | |
| 3 | Princess Queen | 66 | 45 | 57 | -12 | 5.0 | - | |
| 4 | Mercer Girl Line | 61 | 53 | 61 | -8 | 0.0 | ||
| 5 | Allez Les Bleu (AUS) | 60 | 58 | 68 | -10 | 0.0 | - | |
| 6 | Samoa | 67 | 64 | 75 | -11 | 0.0 | - | |
| 7 | Silly Fella | 56 | 51 | 52 | -1 | 6.0 | - | |
| 8 | Lulu's Boy | 66 | 71 | 74 | -3 | 0.0 | - | |
| 9 | True Brit | 69 | 55 | 60 | -5 | 5.0 | - | |
| 10 | Volluto | 71 | 71 | 62 | +9 | 5.0 | - | |
| 11 | Life Goes On | 67 | 54 | 75 | -21 | 0.0 | - | |
| 12 | Meteoric | 71 | 76 | 62 | +14 | 5.0 | - | |
| 13 | Soweto Rose | 69 | 59 | 60 | -1 | 5.0 | - | |
| 14 | Bangor Night | 49 | 45 | 58 | -13 | 0.0 | - | |
| 99 | Blue Eyes | - | 56 | 63 | -7 | 6.0 | - | |
| 99 | Space Race | - | 57 | 63 | -6 | 6.0 | - | |
| 99 | Rozara | - | 73 | 66 | +7 | 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