Official NHA Assessment

Race 7: MARULA SPRINT (For all horses. Non-Black Type)

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Line Horse
William Robertson
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
5 / 10
Within 2 points
Significant Diffs
5 / 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    William Robertson    6    62.5    1    0.00     0.0   125   125          125   +0
2    Shipholia            5    57.0    2    1.30     0.0   105   114          114   +9
3    Sun Blushed          2    62.5    3    2.60     3.0   120   119          119   -1
4    Good Traveller       6    55.0    4    3.40     0.0   95    110          110   +15
5    African Skyline      6    55.0    5    3.90     0.0   97    110          110   +13
6    Proud Master         3    58.0    6    5.30     4.5   103   107          107   +4
7    Donquerari           5    58.0    7    5.90     0.0   102   116          116   +14
8    Except Temptation    2    53.5    8    6.70     3.0   94    101          101   +7
9    Navajo Nation        4    58.0    9    20.90    5.0   102   106          106   +4
99   Quasiforsure         4    62.5    99   0.00     5.0   -     115          115   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 William Robertson Line 125 124 125 -1 0.0
2 Shipholia 105 104 114 -10 0.0 -
3 Sun Blushed 120 120 119 +1 3.0 -
4 Good Traveller 95 108 110 -2 0.0 -
5 African Skyline 97 98 110 -12 0.0 -
6 Proud Master 103 97 107 -10 4.5 -
7 Donquerari 102 86 116 -30 0.0 -
8 Except Temptation 94 84 101 -17 3.0 -
9 Navajo Nation 102 104 106 -2 5.0 -
99 Quasiforsure - 116 115 +1 5.0 -
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