Official NHA Assessment

Race 1: HOLLYWOODBETS DURBANVILLE WELCOMES YOU MAIDEN PLATE (For all Maidens)

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Line Horse
Gravity
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
10 / 10
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Major Apollo         2    59.0    1    0.00     5.5   -     89           6     +6
2    Gravity              4    59.0    2    0.75     10.0  80    80           80    +0
3    Casino Ace           5    60.0    3    3.25     0.0   -     102          102   +102
4    Winning Captain      3    60.0    4    6.00     8.5   68    85           85    +17
5    Captain Cool         3    59.0    5    6.50     8.5   -     83           83    +83
6    Gimme's Captain      3    59.0    6    8.00     8.5   -     83           83    +83
7    Newton Heath         3    59.0    7    8.50     8.5   -     83           83    +83
8    Green Knight         2    59.0    8    9.75     5.5   -     89           89    +89
9    Portcullis           3    59.0    9    13.75    8.5   -     83           83    +83
10   Mo Flow              3    59.0    10   14.05    8.5   -     83           83    +83
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Major Apollo - 72 6 +66 5.5 -
2 Gravity Line 80 63 80 -17 10.0
3 Casino Ace - 56 102 -46 0.0 -
4 Winning Captain 68 54 85 -31 8.5 -
5 Captain Cool - 72 83 -11 8.5 -
6 Gimme's Captain - 66 83 -17 8.5 -
7 Newton Heath - 60 83 -23 8.5 -
8 Green Knight - 60 89 -29 5.5 -
9 Portcullis - 63 83 -20 8.5 -
10 Mo Flow - 66 83 -17 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