Official NHA Assessment

Race 5: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 66 HANDICAP (Open)

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Line Horse
Callaburn
Reference for assessment
Exact Matches
1 / 14
Calculated = Official
Close Matches
2 / 14
Within 2 points
Significant Diffs
10 / 14
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Risky Business       3    58.5    1    0.00     9.0   63    42           63    +0
2    Calida               2    59.0    2    0.90     0.0   65    65           65    +0
3    Callaburn            2    60.0    3    1.00     0.0   67    67           67    +0
4    Vava Vegas           5    57.0    4    1.25     0.0   60    61           61    +1
5    Perini Palace        4    56.5    5    2.00     7.0   60    45           50    -10
6    Cartagena            4    57.5    6    2.75     7.0   61    46           51    -10
7    Zoombomber           2    58.0    7    4.00     0.0   63    60           60    -3
8    Eye Catching         4    52.0    8    4.20     7.0   48    34           38    -10
9    Can't Catch Me       5    52.5    9    4.25     0.0   51    49           49    -2
10   Gal Gadot            8    49.5    10   8.00     0.0   50    42           42    -8
11   Sail The Sky         4    59.0    11   8.25     7.0   65    47           55    -10
12   Spring Palace        2    58.0    12   9.00     0.0   63    59           59    -4
13   His Master's Voice   2    61.5    13   99.99    0.0   69    66           66    -3
99   Stroke Of Mercy      5    58.5    99   0.00     0.0   -     60           60    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Risky Business 63 75 63 +12 9.0 -
2 Calida 65 72 65 +7 0.0 -
3 Callaburn Line 67 52 67 -15 0.0
4 Vava Vegas 60 58 61 -3 0.0 -
5 Perini Palace 60 56 50 +6 7.0 -
6 Cartagena 61 77 51 +26 7.0 -
7 Zoombomber 63 60 60 ✓ Match 0.0 -
8 Eye Catching 48 48 38 +10 7.0 -
9 Can't Catch Me 51 58 49 +9 0.0 -
10 Gal Gadot 50 50 42 +8 0.0 -
11 Sail The Sky 65 62 55 +7 7.0 -
12 Spring Palace 63 58 59 -1 0.0 -
13 His Master's Voice 69 69 66 +3 0.0 -
99 Stroke Of Mercy - 52 60 -8 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