Official NHA Assessment

Race 8: www.trackandball.co.za FM 66 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Birdwatcher
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
6 / 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    Cataleya Summer      2    59.0    1    0.00     0.0   71    60           71    +0
2    Lady Macbeth         3    61.0    2    1.05     3.0   68    62           62    -6
3    Birdwatcher          5    55.5    3    1.10     0.0   57    57           57    +0
4    Arctic Princess      5    60.5    4    1.15     0.0   67    67           67    +0
5    Gimme A Lullaby      3    52.0    5    3.15     3.0   53    42           43    -10
6    Star Choice          5    61.5    6    5.45     0.0   69    65           65    -4
7    Forged In Ice        3    57.5    7    5.65     3.0   64    51           54    -10
8    Tabatha Cat          2    58.5    8    6.55     0.0   70    59           60    -10
9    Kabon Kapi           5    61.5    9    7.25     0.0   76    65           66    -10
99   Meredith Grey        2    56.5    99   0.00     0.0   -     55           55    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cataleya Summer 71 74 71 +3 0.0 -
2 Lady Macbeth 68 68 62 +6 3.0 -
3 Birdwatcher Line 57 53 57 -4 0.0
4 Arctic Princess 67 66 67 -1 0.0 -
5 Gimme A Lullaby 53 59 43 +16 3.0 -
6 Star Choice 69 77 65 +12 0.0 -
7 Forged In Ice 64 57 54 +3 3.0 -
8 Tabatha Cat 70 50 60 -10 0.0 -
9 Kabon Kapi 76 96 66 +30 0.0 -
99 Meredith Grey - 68 55 +13 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