Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (For all Maidens)

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Line Horse
Chasing Cheetahs
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
7 / 12
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    Suryavarman          2    57.0    1    0.00     0.0   -     63           6     +6
2    Chasing Cheetahs     3    60.0    2    1.75     8.0   56    56           56    +0
3    Opening Ceremony     3    60.0    3    1.85     8.0   54    56           56    +2
4    Admirals Chance      5    57.0    4    2.10     0.0   74    66           66    -8
5    Stepdance            2    57.0    5    3.10     0.0   55    65           65    +10
6    Global Mark          3    60.0    6    4.85     8.0   61    53           53    -8
7    Coup Royal           3    60.0    7    4.95     8.0   51    53           53    +2
8    Jack In The Box      5    60.0    8    9.20     0.0   58    69           69    +11
9    Horsey               2    57.0    9    11.70    0.0   72    63           63    -9
10   Badge Of Honour      2    57.0    10   15.20    0.0   -     63           63    +63
11   Dani Boi             4    60.0    11   16.70    5.0   -     59           59    +59
99   The Last Belle       2    57.0    99   0.00     0.0   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Suryavarman - 84 6 +78 0.0 -
2 Chasing Cheetahs Line 56 58 56 +2 8.0
3 Opening Ceremony 54 55 56 -1 8.0 -
4 Admirals Chance 74 77 66 +11 0.0 -
5 Stepdance 55 57 65 -8 0.0 -
6 Global Mark 61 56 53 +3 8.0 -
7 Coup Royal 51 53 53 ✓ Match 8.0 -
8 Jack In The Box 58 53 69 -16 0.0 -
9 Horsey 72 71 63 +8 0.0 -
10 Badge Of Honour - 54 63 -9 0.0 -
11 Dani Boi - 30 59 -29 5.0 -
99 The Last Belle - 59 63 -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