Official NHA Assessment

Race 4: THE INDEPENDENT ON SATURDAY SPORTS MAIDEN PLATE (For all Maidens)

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Line Horse
Director
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
4 / 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    Director             2    60.0    1    0.00     0.0   76    76           76    +0
2    Princess Trippi      3    57.0    2    1.70     2.0   71    69           69    -2
3    Good Omen            2    58.5    3    3.40     0.0   76    74           74    -2
4    Black Platina        2    57.5    4    4.80     0.0   66    71           71    +5
5    Harpa                2    54.5    5    6.10     0.0   73    65           65    -8
6    Apache Ag            4    60.0    6    6.15     0.5   65    75           75    +10
7    Captive Prince       3    60.0    7    6.20     2.0   -     72           72    +72
8    Green Commander      2    60.0    8    6.25     0.0   68    76           76    +8
9    Bourbon's Beast      2    60.0    9    6.30     0.0   73    76           76    +3
10   Kaz From Alcatraz    2    56.0    10   10.20    0.0   -     68           68    +68
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Director Line 76 76 76 ✓ Match 0.0
2 Princess Trippi 71 71 69 +2 2.0 -
3 Good Omen 76 76 74 +2 0.0 -
4 Black Platina 66 66 71 -5 0.0 -
5 Harpa 73 73 65 +8 0.0 -
6 Apache Ag 65 65 75 -10 0.5 -
7 Captive Prince - - 72 -72 2.0 -
8 Green Commander 68 68 76 -8 0.0 -
9 Bourbon's Beast 73 73 76 -3 0.0 -
10 Kaz From Alcatraz - - 68 - 0.0 -
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