Official NHA Assessment

Race 1: www.trackandball.co.za MAIDEN PLATE (For all Maidens)

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Line Horse
Arbitrator
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
9 / 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    Arbitrator           2    58.0    1    0.00     6.5   74    74           74    +0
2    Menelaus             3    56.5    2    1.40     9.5   -     65           65    +65
3    Oshakati             2    58.0    3    1.45     6.5   65    74           74    +9
4    Fire Tonic           3    58.0    4    3.45     9.5   -     68           68    +68
5    Giocatore            2    58.0    5    3.85     6.5   78    74           74    -4
6    Red Magician         3    60.0    6    5.45     9.5   72    72           72    +0
7    Lazy Guy             4    60.0    7    7.05     11.0  70    69           69    -1
8    Lucky Dollar         2    58.0    8    7.75     6.5   -     74           74    +74
9    Easy Roy Easy        3    60.0    9    12.35    9.5   -     72           72    +72
10   Ebony Bay            3    58.0    10   13.65    9.5   -     68           68    +68
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arbitrator Line 74 82 74 +8 6.5
2 Menelaus - 78 65 +13 9.5 -
3 Oshakati 65 59 74 -15 6.5 -
4 Fire Tonic - 72 68 +4 9.5 -
5 Giocatore 78 67 74 -7 6.5 -
6 Red Magician 72 49 72 -23 9.5 -
7 Lazy Guy 70 61 69 -8 11.0 -
8 Lucky Dollar - 85 74 +11 6.5 -
9 Easy Roy Easy - 37 72 -35 9.5 -
10 Ebony Bay - 50 68 -18 9.5 -
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