Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Spy Story
Reference for assessment
Exact Matches
2 / 15
Calculated = Official
Close Matches
2 / 15
Within 2 points
Significant Diffs
10 / 15
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    Pennsylvania         3    59.0    1    0.00     8.5   -     76           6     +6
2    Green Street         3    56.5    2    2.50     8.5   -     71           71    +71
3    Maverick Queen       3    56.5    3    4.75     8.5   -     71           71    +71
4    Spy Story            3    59.0    4    7.25     8.5   76    76           76    +0
5    Antonio Gaudi        2    59.0    5    7.30     5.5   79    82           82    +3
6    Summer Shade         4    60.0    6    8.75     10.0  61    75           75    +14
7    Rawalpindi           2    56.5    7    11.00    5.5   58    77           77    +19
8    Lloyd Wright         3    59.0    8    13.00    8.5   -     76           76    +76
9    Tokyo Medaglia       3    59.0    9    17.25    8.5   -     76           76    +76
10   Old Fashioned        3    59.0    10   17.50    8.5   -     76           76    +76
11   Bompas               4    60.0    11   18.25    10.0  40    75           75    +35
12   Big Boy Bruce        2    60.0    12   21.50    5.5   -     84           84    +84
13   Under The Rainbow    3    60.0    13   27.00    8.5   43    78           78    +35
14   Prince Of Miracles   2    59.0    14   30.25    5.5   61    82           82    +21
99   Quasikat             3    56.5    99   0.00     8.5   -     71           71    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Pennsylvania - 94 6 +88 8.5 -
2 Green Street - 66 71 -5 8.5 -
3 Maverick Queen - 76 71 +5 8.5 -
4 Spy Story Line 76 66 76 -10 8.5
5 Antonio Gaudi 79 82 82 ✓ Match 5.5 -
6 Summer Shade 61 52 75 -23 10.0 -
7 Rawalpindi 58 62 77 -15 5.5 -
8 Lloyd Wright - 80 76 +4 8.5 -
9 Tokyo Medaglia - 68 76 -8 8.5 -
10 Old Fashioned - 76 76 ✓ Match 8.5 -
11 Bompas 40 58 75 -17 10.0 -
12 Big Boy Bruce - 76 84 -8 5.5 -
13 Under The Rainbow 43 64 78 -14 8.5 -
14 Prince Of Miracles 61 58 82 -24 5.5 -
99 Quasikat - 83 71 +12 8.5 -
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