Official NHA Assessment

Race 4: WWW.TAB4RACING.COM MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Callaburn
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
8 / 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    La Moohal            4    60.0    1    0.00     3.0   75    65           65    -10
2    Atarime              3    60.0    2    0.10     6.0   -     59           59    +59
3    Thunee Playa         4    60.0    3    0.40     3.0   -     70           70    +70
4    Dark Silver          4    60.0    4    0.60     3.0   -     70           70    +70
5    Callaburn            2    60.0    5    3.25     0.0   73    73           73    +0
6    Red Knot             4    57.0    6    7.00     3.0   -     59           59    +59
7    Act Of Power         3    60.0    7    7.25     6.0   71    59           61    -10
8    Japanese Star        3    60.0    8    8.75     6.0   75    59           65    -10
99   Battle Of Kursk      2    60.0    99   0.00     0.0   -     71           71    +0
99   Two Miles West       3    60.0    99   0.00     6.0   -     59           59    +0
99   Presley              4    60.0    99   0.00     3.0   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 La Moohal 75 93 65 +28 3.0 -
2 Atarime - 103 59 +44 6.0 -
3 Thunee Playa - 107 70 +37 3.0 -
4 Dark Silver - 84 70 +14 3.0 -
5 Callaburn Line 73 52 73 -21 0.0
6 Red Knot - 62 59 +3 3.0 -
7 Act Of Power 71 50 61 -11 6.0 -
8 Japanese Star 75 68 65 +3 6.0 -
99 Battle Of Kursk - 76 71 +5 0.0 -
99 Two Miles West - 93 59 +34 6.0 -
99 Presley - 90 65 +25 3.0 -
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