Official NHA Assessment

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Line Horse
Callaburn
Reference for assessment
Exact Matches
0 / 14
Calculated = Official
Close Matches
1 / 14
Within 2 points
Significant Diffs
8 / 14
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    Master Christmas     4    60.0    1    0.00     2.5   78    66           66    -12
2    Atarime              3    60.0    2    5.25     5.0   79    61           69    -10
3    Callaburn            2    60.0    3    6.00     0.0   71    71           71    +0
4    Gamer                4    60.0    4    7.75     2.5   74    66           66    -8
5    Battleofbarberton    3    60.0    5    8.25     5.0   -     61           61    +61
6    Green Garnet         4    60.0    6    8.50     2.5   80    66           70    -10
7    Pike Place           3    56.0    7    8.55     5.0   61    53           53    -8
8    Volte Face           3    60.0    8    8.60     5.0   68    61           61    -7
9    Thomas Rainwater     2    60.0    9    10.75    0.0   68    71           71    +3
10   Rastignac            4    60.0    10   11.00    2.5   -     66           66    +66
11   Nkandla Gold         4    60.0    11   13.25    2.5   72    66           66    -6
12   Brightest Blaze      3    60.0    12   28.75    5.0   48    61           61    +13
99   Sword Of Mercy       3    60.0    99   0.00     5.0   -     61           61    +0
99   In A Blue Moon       2    60.0    99   0.00     0.0   -     71           71    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Master Christmas 78 94 66 +28 2.5 -
2 Atarime 79 103 69 +34 5.0 -
3 Callaburn Line 71 52 71 -19 0.0
4 Gamer 74 65 66 -1 2.5 -
5 Battleofbarberton - 86 61 +25 5.0 -
6 Green Garnet 80 81 70 +11 2.5 -
7 Pike Place 61 57 53 +4 5.0 -
8 Volte Face 68 66 61 +5 5.0 -
9 Thomas Rainwater 68 58 71 -13 0.0 -
10 Rastignac - 58 66 -8 2.5 -
11 Nkandla Gold 72 63 66 -3 2.5 -
12 Brightest Blaze 48 43 61 -18 5.0 -
99 Sword Of Mercy - 65 61 +4 5.0 -
99 In A Blue Moon - 74 71 +3 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