Official NHA Assessment

Race 1: BETWAY WORK RIDERS MAIDEN PLATE (For Maidens)

Back to Race
Line Horse
Trumps Express
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
6 / 9
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    Africanroyaljewel    4    60.0    1    0.00     6.0   38    59           44    +6
2    Tara Iti             4    60.0    2    0.05     6.0   57    59           59    +2
3    Trumps Express       4    60.0    3    0.10     6.0   59    59           59    +0
4    Cashing In           3    60.0    4    5.35     5.0   65    61           61    -4
5    Taste Maker          3    57.5    5    6.85     5.0   63    56           56    -7
6    Chinny Rose          3    57.5    6    10.35    5.0   48    56           56    +8
7    Libertarian          4    57.5    7    11.60    6.0   -     54           54    +54
8    Freezing Fast        5    60.0    8    11.70    0.0   56    71           71    +15
9    Mary Kate            3    57.5    9    13.20    5.0   42    56           56    +14
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Africanroyaljewel 38 56 44 +12 6.0 -
2 Tara Iti 57 52 59 -7 6.0 -
3 Trumps Express Line 59 55 59 -4 6.0
4 Cashing In 65 56 61 -5 5.0 -
5 Taste Maker 63 54 56 -2 5.0 -
6 Chinny Rose 48 37 56 -19 5.0 -
7 Libertarian - 27 54 -27 6.0 -
8 Freezing Fast 56 44 71 -27 0.0 -
9 Mary Kate 42 39 56 -17 5.0 -
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