Official NHA Assessment

Race 5: WWW.TAB.CO.ZA NOVICE HANDICAP (Maidens & 1 time winners)

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Line Horse
Spy Story
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 8
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    Stormy Day (ARG)     2    59.0    1    0.00     6.5   90    83           90    +0
2    Spy Story            3    56.0    2    0.30     9.5   71    71           71    +0
3    Merryweather         2    55.5    3    1.40     6.5   83    76           76    -7
4    Maverick Queen       3    50.5    4    1.90     9.5   68    60           60    -8
5    Fifty Ways           2    58.5    5    7.30     6.5   89    82           82    -7
6    Time Will Tell       2    56.5    6    8.70     6.5   85    78           78    -7
99   Blushing Bloom       2    56.0    99   0.00     6.5   -     77           77    +0
99   Top Division         2    60.0    99   0.00     6.5   -     85           85    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Stormy Day (ARG) 90 92 90 +2 6.5 -
2 Spy Story Line 71 66 71 -5 9.5
3 Merryweather 83 88 76 +12 6.5 -
4 Maverick Queen 68 76 60 +16 9.5 -
5 Fifty Ways 89 81 82 -1 6.5 -
6 Time Will Tell 85 69 78 -9 6.5 -
99 Blushing Bloom - 83 77 +6 6.5 -
99 Top Division - 90 85 +5 6.5 -
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