Official NHA Assessment

Race 6: WSB PREMIER'S CHAMPIONS CHALLENGE 29 APRIL FM 90 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Princess Philippa
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
4 / 11
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    Simple Simple        5    54.0    1    0.00     0.0   82    79           82    +0
2    Princess Philippa    3    59.0    2    1.25     2.5   88    88           88    +0
3    National Star        2    52.0    3    1.55     0.0   84    78           78    -6
4    Wokonda              3    61.0    4    1.75     2.5   92    91           91    -1
5    Avoontoast           5    55.5    5    2.25     0.0   86    85           85    -1
6    She's A Rainbow      3    53.5    6    4.00     2.5   77    74           74    -3
7    Prairie Falcon       3    54.0    7    4.50     2.5   78    74           74    -4
8    Queen Of Gaul        2    52.0    8    5.60     0.0   78    75           75    -3
9    Lollapalooza         3    52.0    9    6.70     2.5   74    70           70    -4
10   Strike A Match       2    53.5    10   7.40     0.0   82    78           78    -4
11   Woman Of Substance   3    56.5    11   11.40    2.5   83    79           79    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Simple Simple 82 71 82 -11 0.0 -
2 Princess Philippa Line 88 85 88 -3 2.5
3 National Star 84 75 78 -3 0.0 -
4 Wokonda 92 89 91 -2 2.5 -
5 Avoontoast 86 86 85 +1 0.0 -
6 She's A Rainbow 77 85 74 +11 2.5 -
7 Prairie Falcon 78 78 74 +4 2.5 -
8 Queen Of Gaul 78 66 75 -9 0.0 -
9 Lollapalooza 74 74 70 +4 2.5 -
10 Strike A Match 82 76 78 -2 0.0 -
11 Woman Of Substance 83 62 79 -17 2.5 -
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