Official NHA Assessment

Race 2: TAB TELEBET 0861 000 822 MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Ilha Da Orange
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
8 / 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    Zenobia's Gold       3    60.0    1    0.00     2.5   71    -2           -     -71
2    The Crown            3    60.0    2    0.50     2.5   -     3            3     +3
3    Ilha Da Orange       4    60.0    3    4.50     1.5   -     -            -     +0
4    Arabian Red          4    60.0    4    7.00     1.5   64    -            61    -3
5    Choc' Late           3    60.0    5    12.50    2.5   45    -2           35    -10
99   Chicago Lass         6    60.0    99   0.00     0.0   -     3            3     +0
99   Duchess Of Seville   4    56.0    99   0.00     1.5   -     -8           -8    +0
99   Like A Butterfly     3    60.0    99   0.00     2.5   -     -2           -2    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zenobia's Gold 71 79 - +79 2.5 -
2 The Crown - 70 3 +67 2.5 -
3 Ilha Da Orange Line - 75 - +75 1.5
4 Arabian Red 64 74 61 +13 1.5 -
5 Choc' Late 45 56 35 +21 2.5 -
99 Chicago Lass - 43 3 +40 0.0 -
99 Duchess Of Seville - 53 -8 +61 1.5 -
99 Like A Butterfly - 54 -2 +56 2.5 -
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