Official NHA Assessment

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Line Horse
Mr Master Starter
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
2 / 9
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    Ibutho               7    54.5    1    0.00     0.0   87    84           87    +0
2    Rosh Kedesh          5    52.0    2    1.00     0.0   82    83           83    +1
3    Mr Master Starter    6    59.0    3    1.50     0.0   96    96           96    +0
4    William Rufus        2    56.0    4    1.60     0.0   90    90           90    +0
5    Beechamwood Boy      6    58.0    5    2.30     0.0   94    93           93    -1
6    Nelson Bay           4    57.5    6    2.35     0.5   96    91           91    -5
7    Prince Of Taranto    4    58.0    7    2.40     0.5   94    92           92    -2
8    Blackberry Malt      5    56.5    8    2.80     0.0   91    90           90    -1
99   Grinkov              2    58.0    99   0.00     0.0   -     91           91    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ibutho 87 83 87 -4 0.0 -
2 Rosh Kedesh 82 88 83 +5 0.0 -
3 Mr Master Starter Line 96 97 96 +1 0.0
4 William Rufus 90 88 90 -2 0.0 -
5 Beechamwood Boy 94 84 93 -9 0.0 -
6 Nelson Bay 96 90 91 -1 0.5 -
7 Prince Of Taranto 94 92 92 ✓ Match 0.5 -
8 Blackberry Malt 91 82 90 -8 0.0 -
99 Grinkov - 87 91 -4 0.0 -
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