Official NHA Assessment

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Line Horse
Prosper's Gift
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
5 / 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    One Too Many         3    60.0    1    0.00     2.0   69    66           69    +0
2    Dontshootthebarman   5    60.5    2    0.05     0.0   69    71           71    +2
3    Prosper's Gift       2    59.0    3    2.35     1.0   66    66           66    +0
4    Majorca Palace       4    60.0    4    2.40     2.5   66    65           65    -1
5    Trafalgar Square     6    60.5    5    3.40     0.0   67    71           71    +4
6    Will O Me            2    57.0    6    3.45     1.0   62    62           62    +0
7    Princess Santo       4    52.5    7    3.75     2.5   51    50           50    -1
8    Servilius            3    60.0    8    4.05     2.0   71    66           66    -5
9    Magwinya             2    61.0    9    5.75     1.0   70    70           70    +0
99   Movie Magic          6    55.0    99   0.00     0.0   -     60           60    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 One Too Many 69 79 69 +10 2.0 -
2 Dontshootthebarman 69 93 71 +22 0.0 -
3 Prosper's Gift Line 66 64 66 -2 1.0
4 Majorca Palace 66 51 65 -14 2.5 -
5 Trafalgar Square 67 69 71 -2 0.0 -
6 Will O Me 62 50 62 -12 1.0 -
7 Princess Santo 51 50 50 ✓ Match 2.5 -
8 Servilius 71 65 66 -1 2.0 -
9 Magwinya 70 50 70 -20 1.0 -
99 Movie Magic - 56 60 -4 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