Official NHA Assessment

Race 3: HOBDAY EQUESTRIAN ENTERPRISES B STAKES (F & M) (For Fillies & Mares with a nett rating of 96 & below)

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Line Horse
Kyalami Girl
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 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    Mai Sensation        3    57.0    1    0.00     5.0   94    83           83    -11
2    Miss World           3    60.0    2    0.50     5.0   99    89           89    -10
3    Girl Like Us         4    54.0    3    1.00     6.0   84    75           75    -9
4    Kyalami Girl         2    61.5    4    1.40     3.5   95    95           95    +0
5    Polynomial           3    58.5    5    3.65     5.0   97    86           87    -10
6    School Policy        2    57.0    6    3.75     3.5   87    86           86    -1
7    Japanese Rose        3    58.5    7    9.00     5.0   88    86           86    -2
8    Sahara Cat           3    58.5    8    14.00    5.0   95    86           86    -9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mai Sensation 94 108 83 +25 5.0 -
2 Miss World 99 91 89 +2 5.0 -
3 Girl Like Us 84 80 75 +5 6.0 -
4 Kyalami Girl Line 95 88 95 -7 3.5
5 Polynomial 97 79 87 -8 5.0 -
6 School Policy 87 79 86 -7 3.5 -
7 Japanese Rose 88 80 86 -6 5.0 -
8 Sahara Cat 95 79 86 -7 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