Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
City Lights
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
6 / 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    Oxalis Gold          3    56.0    1    0.00     2.0   -     53           6     +6
2    The Crown            3    60.0    2    0.25     2.0   -     61           61    +61
3    City Lights          4    60.0    3    2.00     0.5   67    67           67    +0
4    Messalina            3    54.5    4    3.00     2.0   -     52           52    +52
5    Twostep Queen        2    56.0    5    3.50     0.0   -     58           58    +58
6    Rainbow River        3    60.0    6    3.75     2.0   72    62           62    -10
7    Spirit In The Wind   4    60.0    7    4.00     0.5   63    65           65    +2
8    Berriesofthestraw    3    60.0    8    21.75    2.0   -     61           61    +61
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Oxalis Gold - 107 6 +101 2.0 -
2 The Crown - 70 61 +9 2.0 -
3 City Lights Line 67 52 67 -15 0.5
4 Messalina - 71 52 +19 2.0 -
5 Twostep Queen - 101 58 +43 0.0 -
6 Rainbow River 72 66 62 +4 2.0 -
7 Spirit In The Wind 63 60 65 -5 0.5 -
8 Berriesofthestraw - 34 61 -27 2.0 -
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