Official NHA Assessment

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

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Line Horse
Trumps Express
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
2 / 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    Potente              2    58.0    1    0.00     7.0   71    64           64    -7
2    Goom Goom            3    60.0    2    1.25     10.5  59    61           61    +2
3    Trumps Express       4    60.0    3    1.50     12.0  58    58           58    +0
4    My Lord And Master   4    60.0    4    2.50     12.0  58    58           58    +0
5    Chariot Master       4    60.0    5    3.00     12.0  54    58           58    +4
6    Siberian Fox         2    58.0    6    3.50     7.0   63    64           64    +1
7    V V Power            3    60.0    7    7.75     10.5  57    61           61    +4
8    Coup Royal           3    60.0    8    14.00    10.5  51    61           61    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Potente 71 60 64 -4 7.0 -
2 Goom Goom 59 59 61 -2 10.5 -
3 Trumps Express Line 58 55 58 -3 12.0
4 My Lord And Master 58 55 58 -3 12.0 -
5 Chariot Master 54 61 58 +3 12.0 -
6 Siberian Fox 63 62 64 -2 7.0 -
7 V V Power 57 39 61 -22 10.5 -
8 Coup Royal 51 53 61 -8 10.5 -
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