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
Green Sapphire
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
10 / 11
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    Green Sapphire       3    60.0    1    0.00     6.0   81    81           81    +0
2    Tipperary            3    58.5    2    1.00     6.0   76    78           78    +2
3    Dupont Emerald       3    58.5    3    1.20     6.0   -     78           78    +78
4    Up The Ante          3    60.0    4    2.50     6.0   -     81           81    +81
5    Ring A Ling          3    60.0    5    3.25     6.0   -     81           81    +81
6    Izanami              3    60.0    6    4.00     6.0   -     81           81    +81
7    Bilingual            4    60.0    7    4.25     7.0   64    79           79    +15
8    Scarlet              3    60.0    8    11.50    6.0   47    81           81    +34
9    Sunfire              2    60.0    9    14.75    4.0   76    85           85    +9
10   Oasis                3    60.0    10   38.50    6.0   -     81           81    +81
99   Gimme A Storm        3    60.0    99   0.00     6.0   -     81           81    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Green Sapphire Line 81 109 81 +28 6.0
2 Tipperary 76 64 78 -14 6.0 -
3 Dupont Emerald - 77 78 -1 6.0 -
4 Up The Ante - 75 81 -6 6.0 -
5 Ring A Ling - 75 81 -6 6.0 -
6 Izanami - 72 81 -9 6.0 -
7 Bilingual 64 60 79 -19 7.0 -
8 Scarlet 47 47 81 -34 6.0 -
9 Sunfire 76 64 85 -21 4.0 -
10 Oasis - - 81 -81 6.0 -
99 Gimme A Storm - 58 81 -23 6.0 -
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