Official NHA Assessment

Race 7: BREEDERS GUINEAS (Listed) (For 3 year-old Fillies)

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Line Horse
Queen Of Shadows
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 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    Europeana            3    60.0    1    0.00     3.0   77    91           83    +6
2    Zambaq               3    60.0    2    1.00     3.0   90    95           95    +5
3    Queen Of Shadows     3    60.0    3    2.25     3.0   94    94           94    +0
4    Sweet The Sound      3    60.0    4    3.25     3.0   84    93           93    +9
5    Winter Scout         3    60.0    5    3.50     3.0   83    92           92    +9
6    Do Si Do             3    60.0    6    4.25     3.0   69    92           92    +23
7    Twice To Heaven      3    60.0    7    5.25     3.0   82    91           91    +9
8    Lollapalooza         3    60.0    8    11.00    3.0   88    91           91    +3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Europeana 77 92 83 +9 3.0 -
2 Zambaq 90 81 95 -14 3.0 -
3 Queen Of Shadows Line 94 95 94 +1 3.0
4 Sweet The Sound 84 60 93 -33 3.0 -
5 Winter Scout 83 80 92 -12 3.0 -
6 Do Si Do 69 65 92 -27 3.0 -
7 Twice To Heaven 82 72 91 -19 3.0 -
8 Lollapalooza 88 74 91 -17 3.0 -
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