Official NHA Assessment

Race 7: #THISISRACING CLASSIFIED STAKES (F & M) (For F & M with nett rating of 71 and below)

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Line Horse
Opera Swing
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
3 / 13
Within 2 points
Significant Diffs
5 / 13
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    Masters Queen        3    58.0    1    0.00     9.0   65    60           60    -5
2    Opera Swing          4    58.0    2    0.25     7.0   64    64           64    +0
3    Miss Millstream      5    60.0    3    1.75     0.0   68    85           85    +17
4    Chloris              4    60.0    4    4.00     7.0   71    69           69    -2
5    DutchessBurnedette   4    56.0    5    4.50     7.0   60    60           60    +0
6    Florida Keys         4    54.0    6    7.50     7.0   57    56           56    -1
7    Tartan Dancer        5    54.0    7    10.00    0.0   57    70           70    +13
8    Gift Of Giving       3    56.0    8    14.00    9.0   61    56           56    -5
9    Bat Out Of Hell      4    58.5    9    15.00    7.0   71    65           65    -6
10   Pink Legacy          3    60.0    10   20.25    9.0   71    64           64    -7
99   Queen Louise         4    54.0    99   0.00     7.0   -     56           56    +0
99   Sparkling Flame      3    56.0    99   0.00     9.0   -     56           56    +0
99   La Duchesse          6    56.0    99   0.00     0.0   -     74           74    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Masters Queen 65 56 60 -4 9.0 -
2 Opera Swing Line 64 82 64 +18 7.0
3 Miss Millstream 68 63 85 -22 0.0 -
4 Chloris 71 73 69 +4 7.0 -
5 DutchessBurnedette 60 64 60 +4 7.0 -
6 Florida Keys 57 54 56 -2 7.0 -
7 Tartan Dancer 57 47 70 -23 0.0 -
8 Gift Of Giving 61 61 56 +5 9.0 -
9 Bat Out Of Hell 71 65 65 ✓ Match 7.0 -
10 Pink Legacy 71 71 64 +7 9.0 -
99 Queen Louise - 58 56 +2 7.0 -
99 Sparkling Flame - 59 56 +3 9.0 -
99 La Duchesse - 59 74 -15 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