Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY GRADUATION PLATE (Maidens,1 & 2 time winners)

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Line Horse
Guy Gibson
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 7
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    The Africa House     4    59.0    1    0.00     5.0   88    88           70    -18
2    Guy Gibson           2    60.0    2    0.10     0.0   100   100          100   +0
3    Ready                2    57.0    3    1.35     0.0   95    97           97    +2
4    Donny Tee            4    60.0    4    4.60     5.0   78    90           90    +12
5    Global State         2    56.0    5    4.65     0.0   84    92           92    +8
6    Das Gute             4    57.0    6    5.15     5.0   72    84           84    +12
7    Coral Creek          3    60.0    7    12.90    8.0   79    84           84    +5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 The Africa House 88 93 70 +23 5.0 -
2 Guy Gibson Line 100 99 100 -1 0.0
3 Ready 95 95 97 -2 0.0 -
4 Donny Tee 78 68 90 -22 5.0 -
5 Global State 84 88 92 -4 0.0 -
6 Das Gute 72 77 84 -7 5.0 -
7 Coral Creek 79 73 84 -11 8.0 -
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