Official NHA Assessment

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

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Line Horse
Fizzly Bubbly
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 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    Golden Grey          4    60.0    1    0.00     0.5   63    66           66    +3
2    Fizzly Bubbly        3    56.0    2    0.50     1.0   62    62           62    +0
3    Bomber Bay           2    60.0    3    2.50     0.0   67    69           69    +2
4    Genteel              3    57.5    4    4.00     1.0   73    61           63    -10
5    Incendiary           3    60.0    5    5.50     1.0   -     65           65    +65
6    Cliffie Clavin       3    60.0    6    6.00     1.0   66    65           65    -1
7    Portfire             3    60.0    7    7.00     1.0   53    65           65    +12
8    Tibbott Bourke       4    60.0    8    21.00    0.5   56    66           66    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Golden Grey 63 64 66 -2 0.5 -
2 Fizzly Bubbly Line 62 70 62 +8 1.0
3 Bomber Bay 67 60 69 -9 0.0 -
4 Genteel 73 68 63 +5 1.0 -
5 Incendiary - 54 65 -11 1.0 -
6 Cliffie Clavin 66 57 65 -8 1.0 -
7 Portfire 53 53 65 -12 1.0 -
8 Tibbott Bourke 56 51 66 -15 0.5 -
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