Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING THURSDAY 5 OCTOBER FM 68 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Countess Danza
Reference for assessment
Exact Matches
2 / 12
Calculated = Official
Close Matches
2 / 12
Within 2 points
Significant Diffs
9 / 12
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Inventrix            2    59.5    1    0.00     5.5   67    56           67    +0
2    Stormy Choice        4    60.5    2    0.50     10.0  80    49           70    -10
3    Countess Danza       5    59.0    3    3.50     0.0   66    66           66    +0
4    Twice As Wild        6    54.5    4    5.00     0.0   57    57           57    +0
5    Si Veloce            4    57.5    5    5.25     10.0  82    43           72    -10
6    Smelting             7    52.0    6    5.75     0.0   55    52           52    -3
7    Petunia              4    52.0    7    7.50     10.0  49    32           39    -10
8    Blue Waters          2    52.5    8    7.60     5.5   53    42           43    -10
9    Prayuponastar        3    52.0    9    9.75     8.5   52    35           42    -10
10   Meet The Captain     4    54.5    10   11.50    10.0  57    37           47    -10
11   Storm Jewel          3    52.0    11   11.55    8.5   51    35           41    -10
12   World Heritage       2    58.5    12   14.50    5.5   65    54           55    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Inventrix 67 73 67 +6 5.5 -
2 Stormy Choice 80 81 70 +11 10.0 -
3 Countess Danza Line 66 51 66 -15 0.0
4 Twice As Wild 57 51 57 -6 0.0 -
5 Si Veloce 82 50 72 -22 10.0 -
6 Smelting 55 52 52 ✓ Match 0.0 -
7 Petunia 49 47 39 +8 10.0 -
8 Blue Waters 53 61 43 +18 5.5 -
9 Prayuponastar 52 52 42 +10 8.5 -
10 Meet The Captain 57 52 47 +5 10.0 -
11 Storm Jewel 51 48 41 +7 8.5 -
12 World Heritage 65 55 55 ✓ Match 5.5 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. 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