Official NHA Assessment

Race 4: NIGHTINGALE PINNACLE STAKES (F & M) (For Fillies and Mares)

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Line Horse
Bella Chica
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    Remember When        3    56.0    1    0.00     4.5   97    104          103   +6
2    Bella Chica          3    56.5    2    2.50     4.5   105   105          105   +0
3    Thumbs Up            4    60.0    3    3.00     5.0   104   111          111   +7
4    Bequest              4    56.0    4    3.50     5.0   90    103          103   +13
5    Mind Reader          5    60.0    5    4.00     0.0   103   121          121   +18
6    May Queen            5    58.0    6    5.75     0.0   98    117          117   +19
99   Before The Dawn      5    58.0    99   0.00     0.0   -     117          117   +0
99   Seemyvision          5    54.0    99   0.00     0.0   -     109          109   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Remember When 97 90 103 -13 4.5 -
2 Bella Chica Line 105 106 105 +1 4.5
3 Thumbs Up 104 106 111 -5 5.0 -
4 Bequest 90 85 103 -18 5.0 -
5 Mind Reader 103 100 121 -21 0.0 -
6 May Queen 98 90 117 -27 0.0 -
99 Before The Dawn - 99 117 -18 0.0 -
99 Seemyvision - 89 109 -20 0.0 -
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