Official NHA Assessment

Race 8: BETONTAB.CO.ZA FM 90 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Rozara
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
5 / 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    Big Eyed Girl        3    56.5    1    0.00     2.5   83    83           83    +0
2    Rozara               3    56.0    2    3.50     2.5   82    82           82    +0
3    May Queen            5    61.5    3    4.50     0.0   93    98           98    +5
4    Wings Of Nike        6    56.0    4    6.00     0.0   81    87           87    +6
5    Strike A Match       2    54.5    5    6.25     1.5   82    81           81    -1
6    Vivacious Spirit     2    55.5    6    7.25     1.5   89    83           83    -6
7    Civil Princess (ARG  3    54.0    7    9.00     2.5   81    78           78    -3
8    Silver Winter        2    56.0    8    17.00    1.5   85    84           84    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Big Eyed Girl 83 96 83 +13 2.5 -
2 Rozara Line 82 73 82 -9 2.5
3 May Queen 93 90 98 -8 0.0 -
4 Wings Of Nike 81 68 87 -19 0.0 -
5 Strike A Match 82 76 81 -5 1.5 -
6 Vivacious Spirit 89 78 83 -5 1.5 -
7 Civil Princess (ARG) 81 72 78 -6 2.5 -
8 Silver Winter 85 88 84 +4 1.5 -
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