Official NHA Assessment

Race 1: Hollywoodbets WORK RIDERS' SERIES LEG 3 MAIDEN PLATE (For all Maidens)

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Line Horse
Rosa Osiria
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
7 / 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    Indebe Mayibuye      3    59.5    1    0.00     4.5   70    70           70    +0
2    Blue Ribbon Day      3    62.0    2    1.00     4.5   59    75           75    +16
3    Wild Applause        3    59.5    3    4.50     4.5   80    70           70    -10
4    Rosa Osiria          3    59.5    4    6.75     4.5   70    70           70    +0
5    Conscientious        3    59.5    5    9.25     4.5   -     70           70    +70
6    The Postman          2    62.0    6    12.25    3.0   51    78           78    +27
7    Lucky Thirteen       4    59.5    7    18.50    5.0   50    69           69    +19
99   Dive Bomber          3    62.0    99   0.00     4.5   -     75           75    +0
99   Peanut Pops          4    62.0    99   0.00     5.0   -     74           74    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Indebe Mayibuye 70 79 70 +9 4.5 -
2 Blue Ribbon Day 59 80 75 +5 4.5 -
3 Wild Applause 80 86 70 +16 4.5 -
4 Rosa Osiria Line 70 57 70 -13 4.5
5 Conscientious - 60 70 -10 4.5 -
6 The Postman 51 51 78 -27 3.0 -
7 Lucky Thirteen 50 49 69 -20 5.0 -
99 Dive Bomber - 71 75 -4 4.5 -
99 Peanut Pops - 64 74 -10 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