Official NHA Assessment

Race 4: WWW.TAB.CO.ZA MAIDEN PLATE (F & M) (For Maiden F&M)

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Line Horse
Nkwenkwezi
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
8 / 10
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    Cape Saffron         3    60.0    1    0.00     3.5   71    67           67    -4
2    On A Jet Plane       3    60.0    2    0.10     3.5   76    67           67    -9
3    Nkwenkwezi           3    60.0    3    0.30     3.5   72    72           72    +0
4    Artic Silver         3    60.0    4    0.35     3.5   70    72           72    +2
5    Lava Lamp            3    60.0    5    1.15     3.5   -     71           71    +71
6    Reflective           3    60.0    6    1.55     3.5   -     70           70    +70
7    Flightlight          3    60.0    7    4.95     3.5   63    67           67    +4
8    Red Sparrow          3    60.0    8    6.45     3.5   53    67           67    +14
9    Beverly Baby         3    60.0    9    8.65     3.5   53    67           67    +14
99   Amber Eyes           3    56.0    99   0.00     3.5   -     59           59    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cape Saffron 71 82 67 +15 3.5 -
2 On A Jet Plane 76 71 67 +4 3.5 -
3 Nkwenkwezi Line 72 78 72 +6 3.5
4 Artic Silver 70 77 72 +5 3.5 -
5 Lava Lamp - 84 71 +13 3.5 -
6 Reflective - 77 70 +7 3.5 -
7 Flightlight 63 61 67 -6 3.5 -
8 Red Sparrow 53 55 67 -12 3.5 -
9 Beverly Baby 53 53 67 -14 3.5 -
99 Amber Eyes - 50 59 -9 3.5 -
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