Official NHA Assessment

Race 2: 4RACING.TV OPEN MAIDEN (F & M) (For all Maiden F&M. R15 000 Win bonus ROA Members)

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Line Horse
Tune Again
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    Little Lexi          3    53.0    1    0.00     4.5   54    45           45    -9
2    Natural Wonder       3    51.5    2    2.00     4.5   48    42           42    -6
3    Oh Yoko              3    54.0    3    2.75     4.5   62    47           52    -10
4    Sheets And Goggles   3    61.0    4    2.80     4.5   76    61           66    -10
5    Tune Again           6    55.5    5    4.05     0.0   59    59           59    +0
6    Regina Lou           3    53.5    6    8.30     4.5   61    46           51    -10
7    Pearly Ash           2    51.5    7    16.55    3.0   56    45           46    -10
8    Ulovane              2    61.0    8    19.55    3.0   -     64           64    +64
99   Serendipitous        3    57.0    99   0.00     4.5   -     53           53    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Little Lexi 54 59 45 +14 4.5 -
2 Natural Wonder 48 55 42 +13 4.5 -
3 Oh Yoko 62 54 52 +2 4.5 -
4 Sheets And Goggles 76 63 66 -3 4.5 -
5 Tune Again Line 59 50 59 -9 0.0
6 Regina Lou 61 54 51 +3 4.5 -
7 Pearly Ash 56 51 46 +5 3.0 -
8 Ulovane - - 64 -64 3.0 -
99 Serendipitous - 60 53 +7 4.5 -
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