Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS 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 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
3 / 7
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    Arctic Vixen         2    60.0    1    0.00     0.0   65    75           71    +6
2    Gloria Mundi         2    58.0    2    5.75     0.0   68    71           71    +3
3    City Lights          4    60.0    3    7.00     5.0   65    65           65    +0
4    Ruby Rebel           3    58.0    4    10.50    9.0   -     53           53    +53
5    Regina Maris         2    58.0    5    12.00    0.0   68    71           71    +3
6    Plum Blossom         3    60.0    6    21.50    9.0   57    57           57    +0
7    Pass The Baton       4    60.0    7    30.00    5.0   57    65           65    +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arctic Vixen 65 66 71 -5 0.0 -
2 Gloria Mundi 68 66 71 -5 0.0 -
3 City Lights Line 65 52 65 -13 5.0
4 Ruby Rebel - 80 53 +27 9.0 -
5 Regina Maris 68 68 71 -3 0.0 -
6 Plum Blossom 57 53 57 -4 9.0 -
7 Pass The Baton 57 48 65 -17 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