Official NHA Assessment

Race 9: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 FM 80 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Open Sesame
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
3 / 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    Northern Kitten      3    52.0    1    0.00     5.0   63    61           63    +0
2    Kensal Green         2    52.5    2    0.25     0.0   78    72           72    -6
3    Aquarius             3    55.5    3    0.75     5.0   81    72           72    -9
4    Open Sesame          2    57.0    4    1.75     0.0   84    84           84    +0
5    Sheets And Goggles   3    53.5    5    2.75     5.0   67    66           66    -1
6    Azaleas For All      4    60.0    6    3.00     2.5   80    84           84    +4
7    Way To Burn          3    56.0    7    8.25     5.0   72    69           69    -3
8    Nkwenkwezi           3    59.0    8    14.50    5.0   78    75           75    -3
99   Amazon Queen         3    55.5    99   0.00     5.0   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Northern Kitten 63 67 63 +4 5.0 -
2 Kensal Green 78 79 72 +7 0.0 -
3 Aquarius 81 81 72 +9 5.0 -
4 Open Sesame Line 84 84 84 ✓ Match 0.0
5 Sheets And Goggles 67 63 66 -3 5.0 -
6 Azaleas For All 80 82 84 -2 2.5 -
7 Way To Burn 72 66 69 -3 5.0 -
8 Nkwenkwezi 78 78 75 +3 5.0 -
99 Amazon Queen - 81 68 +13 5.0 -
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