Official NHA Assessment

Race 9: TAB SA DERBY (Grade 2) (3 year olds (3rd Leg SA Triple Crown))

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Line Horse
Curious Girl
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
10 / 13
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    Curious Girl         3    57.5    1    0.00     5.5   92    92           92    +0
2    Salani Kahle         3    60.0    2    1.20     5.5   97    102          102   +5
3    Master Spy           2    60.0    3    2.20     0.0   88    112          112   +24
4    Diogenes             2    60.0    4    4.30     0.0   86    109          109   +23
5    Copper Eagle         2    60.0    5    5.50     0.0   100   108          108   +8
6    Titans Of War        2    60.0    6    5.55     0.0   91    108          108   +17
7    Texas Missile        3    60.0    7    6.65     5.5   94    97           97    +3
8    Bellerophon          3    60.0    8    8.25     5.5   89    97           97    +8
9    Radio Star           2    60.0    9    13.50    0.0   102   108          108   +6
10   Culturati            3    60.0    10   15.75    5.5   85    97           97    +12
11   Tommy Shelby         2    60.0    11   19.50    0.0   101   108          108   +7
12   Reign On Impact      2    60.0    12   39.25    0.0   74    108          108   +34
13   Sword Speed          3    60.0    13   99.99    5.5   87    97           97    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Curious Girl Line 92 100 92 +8 5.5
2 Salani Kahle 97 103 102 +1 5.5 -
3 Master Spy 88 102 112 -10 0.0 -
4 Diogenes 86 99 109 -10 0.0 -
5 Copper Eagle 100 97 108 -11 0.0 -
6 Titans Of War 91 95 108 -13 0.0 -
7 Texas Missile 94 94 97 -3 5.5 -
8 Bellerophon 89 92 97 -5 5.5 -
9 Radio Star 102 102 108 -6 0.0 -
10 Culturati 85 85 97 -12 5.5 -
11 Tommy Shelby 101 101 108 -7 0.0 -
12 Reign On Impact 74 74 108 -34 0.0 -
13 Sword Speed 87 87 97 -10 5.5 -
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