Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING THURSDAY 20 JULY CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
Mia Regina
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
5 / 9
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    What A Tiger         5    57.5    1    0.00     0.0   65    70           70    +5
2    Gimme The Flame      5    54.0    2    1.50     0.0   62    63           63    +1
3    Mia Regina           2    56.0    3    2.00     0.5   66    66           66    +0
4    Prayuponastar        3    51.5    4    3.25     1.5   58    55           55    -3
5    Insatiable           3    60.0    5    6.00     1.5   72    72           72    +0
6    Giancarlo            2    55.5    6    8.25     0.5   48    65           65    +17
7    Gimme Royalty        3    55.5    7    8.50     1.5   52    63           63    +11
99   Mandalay             3    54.0    99   0.00     1.5   -     60           60    +0
99   Time Silhouette      3    54.0    99   0.00     1.5   -     60           60    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 What A Tiger 65 71 70 +1 0.0 -
2 Gimme The Flame 62 50 63 -13 0.0 -
3 Mia Regina Line 66 63 66 -3 0.5
4 Prayuponastar 58 52 55 -3 1.5 -
5 Insatiable 72 62 72 -10 1.5 -
6 Giancarlo 48 45 65 -20 0.5 -
7 Gimme Royalty 52 49 63 -14 1.5 -
99 Mandalay - 53 60 -7 1.5 -
99 Time Silhouette - 56 60 -4 1.5 -
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