Official NHA Assessment

Race 5: BETWAY JOBURG SPRING F & M CHALLENGE (Grade 2) (For Fillies and Mares at Weight for age + Penalties)

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Line Horse
Captain Peg
Reference for assessment
Exact Matches
2 / 13
Calculated = Official
Close Matches
4 / 13
Within 2 points
Significant Diffs
8 / 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    Feather Boa          2    58.5    1    0.00     0.0   114   105          105   -9
2    Captain Peg          5    58.5    2    1.00     0.0   109   109          109   +0
3    Just Be Lekker       4    51.0    3    1.30     5.0   93    83           83    -10
4    Emirate Gina         2    58.5    4    1.45     0.0   102   108          108   +6
5    Marigold Hotel       3    59.0    5    1.50     8.0   107   93           97    -10
6    Gimme A Shot         2    59.5    6    1.60     0.0   113   110          110   -3
7    Mrs Browning         5    58.5    7    3.60     0.0   103   106          106   +3
8    Good Queen Bess (GB  4    59.0    8    3.90     5.0   89    97           97    +8
9    Tipsy Tarragon       2    58.5    9    4.20     0.0   109   106          106   -3
10   Humdinger            3    60.0    10   5.10     8.0   119   92           109   -10
11   Full Velocity        4    59.0    11   6.20     5.0   105   96           96    -9
12   None Other           5    59.5    12   7.80     0.0   110   107          107   -3
13   Lady Of Power        2    59.5    13   8.50     0.0   109   107          107   -2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Feather Boa 114 114 105 +9 0.0 -
2 Captain Peg Line 109 100 109 -9 0.0
3 Just Be Lekker 93 113 83 +30 5.0 -
4 Emirate Gina 102 103 108 -5 0.0 -
5 Marigold Hotel 107 107 97 +10 8.0 -
6 Gimme A Shot 113 110 110 ✓ Match 0.0 -
7 Mrs Browning 103 115 106 +9 0.0 -
8 Good Queen Bess (GB) 89 97 97 ✓ Match 5.0 -
9 Tipsy Tarragon 109 108 106 +2 0.0 -
10 Humdinger 119 119 109 +10 8.0 -
11 Full Velocity 105 94 96 -2 5.0 -
12 None Other 110 115 107 +8 0.0 -
13 Lady Of Power 109 100 107 -7 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