Official NHA Assessment

Race 9: NEXT VAAL RACEMEETING TUESDAY 27 DECEMBER CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
Raratonga Rose
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
8 / 13
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    Raratonga Rose       2    57.5    1    0.00     0.0   85    85           85    +0
2    Forged By Fire       3    60.0    2    1.00     7.0   70    82           82    +12
3    Flag Bearer          3    56.0    3    2.25     7.0   69    73           73    +4
4    Global Breeze        2    56.0    4    3.00     0.0   74    85           85    +11
5    Gregor Macgregor     4    60.0    5    4.00     3.5   68    85           85    +17
6    Linganomore          3    57.5    6    4.75     7.0   70    71           71    +1
7    The Inkosana         3    51.5    7    5.25     7.0   60    59           59    -1
8    Lady Regent          2    57.5    8    6.50     0.0   82    85           85    +3
9    Mirren               4    57.5    9    6.75     3.5   69    78           78    +9
10   Ideal Future         6    53.5    10   7.75     0.0   63    77           77    +14
11   Vengeance Forever    3    58.0    11   9.50     7.0   67    72           72    +5
12   Golden Tune          5    60.0    12   12.00    0.0   70    90           90    +20
99   Master Of Coin       3    60.0    99   0.00     7.0   -     76           76    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Raratonga Rose Line 85 80 85 -5 0.0
2 Forged By Fire 70 66 82 -16 7.0 -
3 Flag Bearer 69 60 73 -13 7.0 -
4 Global Breeze 74 75 85 -10 0.0 -
5 Gregor Macgregor 68 63 85 -22 3.5 -
6 Linganomore 70 73 71 +2 7.0 -
7 The Inkosana 60 67 59 +8 7.0 -
8 Lady Regent 82 84 85 -1 0.0 -
9 Mirren 69 67 78 -11 3.5 -
10 Ideal Future 63 72 77 -5 0.0 -
11 Vengeance Forever 67 51 72 -21 7.0 -
12 Golden Tune 70 68 90 -22 0.0 -
99 Master Of Coin - 72 76 -4 7.0 -
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