Official NHA Assessment

Race 5: TRACK AND BALL GAMING CONDITIONAL MAIDEN (Maidens with 3 runs or more & Nett Rating of 71 or less)

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Line Horse
Cotton Ron
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
4 / 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    Maserati Roar        3    59.0    1    0.00     2.5   68    59           59    -9
2    Victor Rail          5    58.5    2    3.20     0.0   69    63           63    -6
3    Cotton Ron           6    58.0    3    3.40     0.0   62    62           62    +0
4    Brosnan              2    60.0    4    4.40     1.5   70    63           63    -7
5    Rare Flag            3    57.0    5    4.70     2.5   58    55           55    -3
6    El Draque            5    58.0    6    5.10     0.0   63    62           62    -1
7    Moon Harvest         2    60.0    7    5.60     1.5   70    63           63    -7
8    Servilius            3    57.0    8    7.50     2.5   62    55           55    -7
9    Olympic Standard     3    56.0    9    9.70     2.5   59    53           53    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Maserati Roar 68 69 59 +10 2.5 -
2 Victor Rail 69 61 63 -2 0.0 -
3 Cotton Ron Line 62 59 62 -3 0.0
4 Brosnan 70 75 63 +12 1.5 -
5 Rare Flag 58 54 55 -1 2.5 -
6 El Draque 63 57 62 -5 0.0 -
7 Moon Harvest 70 55 63 -8 1.5 -
8 Servilius 62 65 55 +10 2.5 -
9 Olympic Standard 59 53 53 ✓ Match 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