Official NHA Assessment

Race 1: HOLLYWOODBETS DURBANVILLE WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

Back to Race
Line Horse
Heritage Ridge
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
6 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Priscilla Maisey     2    59.0    1    0.00     5.5   88    83           83    -5
2    Call Me Jane         3    59.0    2    2.00     8.5   -     77           77    +77
3    Heritage Ridge       3    59.0    3    2.75     8.5   77    77           77    +0
4    Frida Kahlo          3    59.0    4    3.15     8.5   -     77           77    +77
5    Angel's Oasis        3    59.0    5    3.65     8.5   -     77           77    +77
6    Beneath The Clouds   3    59.0    6    4.65     8.5   -     77           77    +77
7    Saloon Girl          2    59.0    7    5.40     5.5   70    83           83    +13
8    Spirit Guide         3    60.0    8    5.60     8.5   70    79           79    +9
9    Over The Atlantic    3    59.0    9    9.10     8.5   69    77           77    +8
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Priscilla Maisey 88 80 83 -3 5.5 -
2 Call Me Jane - 72 77 -5 8.5 -
3 Heritage Ridge Line 77 59 77 -18 8.5
4 Frida Kahlo - 81 77 +4 8.5 -
5 Angel's Oasis - 64 77 -13 8.5 -
6 Beneath The Clouds - 83 77 +6 8.5 -
7 Saloon Girl 70 53 83 -30 5.5 -
8 Spirit Guide 70 63 79 -16 8.5 -
9 Over The Atlantic 69 56 77 -21 8.5 -
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