Official NHA Assessment

Race 4: CLASSIC DAY 5 MARCH MR 80 APPRENTICE HANDICAP (Open)

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Line Horse
Duke Of Rain
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
5 / 8
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    Juan Carlos          7    59.0    1    0.00     0.0   81    104          81    +0
2    Duke Of Rain         3    49.0    2    2.50     5.0   76    76           76    +0
3    Quiet Rebellion      3    50.5    3    2.70     5.0   76    79           79    +3
4    Qunetra              4    52.0    4    3.25     2.5   72    87           87    +15
5    Have A Go Jo         4    60.0    5    3.75     2.5   80    102          102   +22
6    Bey Suyay            4    53.5    6    5.50     2.5   75    88           88    +13
7    Twin Turbo           4    58.0    7    7.25     2.5   84    97           97    +13
8    Blue Moon City       4    56.5    8    9.25     2.5   78    94           94    +16
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Juan Carlos 81 93 81 +12 0.0 -
2 Duke Of Rain Line 76 70 76 -6 5.0
3 Quiet Rebellion 76 74 79 -5 5.0 -
4 Qunetra 72 83 87 -4 2.5 -
5 Have A Go Jo 80 70 102 -32 2.5 -
6 Bey Suyay 75 84 88 -4 2.5 -
7 Twin Turbo 84 88 97 -9 2.5 -
8 Blue Moon City 78 75 94 -19 2.5 -
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