Official NHA Assessment

Race 3: EQUUS CHAMPION OWNER MRS G A RUPERT MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Circle Of Grace
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
7 / 9
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    Eiffel Tower         4    58.0    1    0.00     12.0  -     76           6     +6
2    Pocket Watch         2    58.0    2    0.20     7.0   -     86           86    +86
3    Trip To States       5    60.0    3    2.25     0.0   71    104          104   +33
4    Circle Of Grace      4    58.0    4    4.00     12.0  76    76           76    +0
5    Griffin Park         4    58.0    5    5.25     12.0  -     76           76    +76
6    Crown Prince         3    60.0    6    8.00     10.5  52    83           83    +31
7    Al Bayreg            3    58.0    7    10.25    10.5  -     79           79    +79
8    Rock Of Ages         2    58.0    8    13.50    7.0   49    86           86    +37
9    Jet Speed            3    58.0    9    99.99    10.5  -     79           79    +79
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Eiffel Tower - 69 6 +63 12.0 -
2 Pocket Watch - 83 86 -3 7.0 -
3 Trip To States 71 63 104 -41 0.0 -
4 Circle Of Grace Line 76 51 76 -25 12.0
5 Griffin Park - 58 76 -18 12.0 -
6 Crown Prince 52 50 83 -33 10.5 -
7 Al Bayreg - 79 79 ✓ Match 10.5 -
8 Rock Of Ages 49 49 86 -37 7.0 -
9 Jet Speed - 46 79 -33 10.5 -
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