Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (For all Maidens)

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Line Horse
Amanatto
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    Originator           4    60.0    1    0.00     7.0   67    63           63    -4
2    Amanatto             3    57.5    2    0.50     6.0   60    60           60    +0
3    Warrior's Sword      2    60.0    3    1.75     4.0   39    69           69    +30
4    Blame It On Me       4    60.0    4    2.25     7.0   50    63           63    +13
5    Good Shine           2    60.0    5    2.50     4.0   58    69           69    +11
6    O Space O            2    60.0    6    2.75     4.0   60    69           69    +9
7    Norse Warrior        2    60.0    7    7.00     4.0   55    69           69    +14
8    Playmaker            3    60.0    8    7.75     6.0   -     65           65    +65
99   Here Comes Johnny    3    60.0    99   0.00     6.0   -     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 Originator 67 67 63 +4 7.0 -
2 Amanatto Line 60 64 60 +4 6.0
3 Warrior's Sword 39 63 69 -6 4.0 -
4 Blame It On Me 50 65 63 +2 7.0 -
5 Good Shine 58 55 69 -14 4.0 -
6 O Space O 60 59 69 -10 4.0 -
7 Norse Warrior 55 56 69 -13 4.0 -
8 Playmaker - 68 65 +3 6.0 -
99 Here Comes Johnny - 71 65 +6 6.0 -
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