Official NHA Assessment

Race 8: RACEHORSE OWNERS ASSOCIATION PINNACLE STAKES (F & M) (For Fillies and Mares)

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Line Horse
Bon Vivant
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
6 / 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    Sentbydestiny        4    56.0    1    0.00     1.5   100   105          105   +5
2    Bon Vivant           3    50.0    2    0.75     2.5   95    95           95    +0
3    Zarina               4    62.0    3    1.25     1.5   119   121          121   +2
4    Follow Me            3    54.0    4    1.35     2.5   102   102          102   +0
5    Now You See Me       6    52.5    5    1.55     0.0   93    104          104   +11
6    Anne Boleyn          5    52.0    6    2.25     0.0   90    103          103   +13
7    Winter Smoke         4    58.0    7    2.50     1.5   107   111          111   +4
8    Chat Ching           4    58.0    8    4.25     1.5   107   110          110   +3
9    Pretty Betty         4    56.0    9    6.50     1.5   104   105          105   +1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sentbydestiny 100 103 105 -2 1.5 -
2 Bon Vivant Line 95 96 95 +1 2.5
3 Zarina 119 111 121 -10 1.5 -
4 Follow Me 102 94 102 -8 2.5 -
5 Now You See Me 93 84 104 -20 0.0 -
6 Anne Boleyn 90 93 103 -10 0.0 -
7 Winter Smoke 107 112 111 +1 1.5 -
8 Chat Ching 107 102 110 -8 1.5 -
9 Pretty Betty 104 94 105 -11 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