Official NHA Assessment

Race 7: WALMER HANDICAP (For Fillies and Mares - Non-Black Type)

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Line Horse
Official Secret
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
7 / 10
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    Joy And Peace        4    60.0    1    0.00     0.5   100   96           100   +0
2    Crimson Princess     4    59.0    2    0.10     0.5   95    94           94    -1
3    Official Secret      6    59.5    3    4.85     0.0   96    96           96    +0
4    Gideon's Daughter    4    54.5    4    5.35     0.5   89    85           85    -4
4    Opera Swing          4    53.0    4    5.35     0.5   82    82           82    +0
6    Essential            4    53.5    6    5.45     0.5   87    83           83    -4
7    Dame Of Flames       3    56.5    7    5.95     1.5   90    87           87    -3
8    Amazing Colours      4    54.0    8    8.20     0.5   87    84           84    -3
9    Say Yes              2    56.5    9    16.45    0.0   90    90           90    +0
10   Aerial View          3    52.5    10   22.70    1.5   82    79           79    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Joy And Peace 100 110 100 +10 0.5 -
2 Crimson Princess 95 102 94 +8 0.5 -
3 Official Secret Line 96 103 96 +7 0.0
4 Gideon's Daughter 89 94 85 +9 0.5 -
4 Opera Swing 82 82 82 ✓ Match 0.5 -
6 Essential 87 91 83 +8 0.5 -
7 Dame Of Flames 90 95 87 +8 1.5 -
8 Amazing Colours 87 59 84 -25 0.5 -
9 Say Yes 90 90 90 ✓ Match 0.0 -
10 Aerial View 82 82 79 +3 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