Official NHA Assessment

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Line Horse
Callaburn
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 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    Battleofbarberton    3    60.0    1    0.00     2.0   74    66           66    -8
2    Rossore Finale       2    60.0    2    1.25     0.0   78    74           74    -4
3    Master Tik Tok       5    60.0    3    2.00     0.0   65    73           73    +8
4    Callaburn            2    60.0    4    3.25     0.0   72    72           72    +0
5    Sakurajima           3    56.0    5    4.00     2.0   -     59           59    +59
6    Master Forester      3    56.0    6    10.50    2.0   -     58           58    +58
7    Justcruisinalong     3    60.0    7    19.50    2.0   53    66           66    +13
99   Chieftain's Shield   4    60.0    99   0.00     0.5   -     69           69    +0
99   Deception Pass       4    60.0    99   0.00     0.5   -     69           69    +0
99   Under The Rainbow    3    56.0    99   0.00     2.0   -     58           58    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Battleofbarberton 74 86 66 +20 2.0 -
2 Rossore Finale 78 76 74 +2 0.0 -
3 Master Tik Tok 65 80 73 +7 0.0 -
4 Callaburn Line 72 52 72 -20 0.0
5 Sakurajima - 90 59 +31 2.0 -
6 Master Forester - 90 58 +32 2.0 -
7 Justcruisinalong 53 45 66 -21 2.0 -
99 Chieftain's Shield - 80 69 +11 0.5 -
99 Deception Pass - 77 69 +8 0.5 -
99 Under The Rainbow - 64 58 +6 2.0 -
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