Official NHA Assessment

Race 7: WWW.TAB.CO.ZA FM 74 DIVIDED HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Scarlett Heart
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
4 / 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    Opera Fan            2    57.0    1    0.00     0.0   78    74           78    +0
2    Scarlett Heart       2    59.0    2    1.25     0.0   82    82           82    +0
3    Sigrid Swing         4    59.5    3    1.55     2.5   73    77           77    +4
4    Together Again       5    48.0    4    2.65     0.0   51    58           58    +7
5    Pretty Analia        5    57.5    5    3.95     0.0   69    76           76    +7
6    Special Star         2    59.0    6    4.75     0.0   82    78           78    -4
7    Zahra Dominia        2    55.0    7    5.50     0.0   74    70           70    -4
99   Amazon Queen         3    58.5    99   0.00     5.0   -     67           67    +0
99   Top Shelf Teddy      2    59.0    99   0.00     0.0   -     78           78    +0
99   Alta Capitana        2    60.0    99   0.00     0.0   -     80           80    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Opera Fan 78 81 78 +3 0.0 -
2 Scarlett Heart Line 82 108 82 +26 0.0
3 Sigrid Swing 73 70 77 -7 2.5 -
4 Together Again 51 55 58 -3 0.0 -
5 Pretty Analia 69 61 76 -15 0.0 -
6 Special Star 82 82 78 +4 0.0 -
7 Zahra Dominia 74 70 70 ✓ Match 0.0 -
99 Amazon Queen - 81 67 +14 5.0 -
99 Top Shelf Teddy - 80 78 +2 0.0 -
99 Alta Capitana - 80 80 ✓ Match 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