Official NHA Assessment

Race 10: EDEN ROC CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 80)

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Line Horse
Princess Palace
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
3 / 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    Poursomesugaronme    5    56.0    1    0.00     0.0   72    76           76    +4
2    Happy Fortune        3    55.5    2    2.10     1.0   74    76           76    +2
3    Princess Palace      3    55.0    3    3.50     1.0   73    73           73    +0
4    Miss Paget           4    55.5    4    5.30     0.5   71    74           74    +3
5    Mississippi Spice    3    48.0    5    6.50     1.0   66    58           58    -8
6    Shesha Ntombi        3    55.0    6    6.70     1.0   72    72           72    +0
7    Among The Clouds     4    58.5    7    7.60     0.5   77    80           80    +3
8    Chelsea Flower       6    60.0    8    7.65     0.0   80    84           84    +4
9    Littleblackgem       3    48.5    9    8.45     1.0   68    59           59    -9
10   Maverick Queen       3    57.5    10   9.05     1.0   78    77           77    -1
99   The Queen Bee        4    52.5    99   0.00     0.5   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Poursomesugaronme 72 77 76 +1 0.0 -
2 Happy Fortune 74 80 76 +4 1.0 -
3 Princess Palace Line 73 68 73 -5 1.0
4 Miss Paget 71 71 74 -3 0.5 -
5 Mississippi Spice 66 64 58 +6 1.0 -
6 Shesha Ntombi 72 74 72 +2 1.0 -
7 Among The Clouds 77 77 80 -3 0.5 -
8 Chelsea Flower 80 77 84 -7 0.0 -
9 Littleblackgem 68 61 59 +2 1.0 -
10 Maverick Queen 78 76 77 -1 1.0 -
99 The Queen Bee - 53 68 -15 0.5 -
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