Official NHA Assessment

Race 1: ILHA BELA MAIDEN PLATE (F & M) (Maidens F&M.R40000 Win bonus ROA Members)

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Line Horse
Summer Fling
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 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    Winter Muse          3    60.0    1    0.00     4.5   -     3            3     +3
2    Poursomesugaronme    5    60.0    2    0.75     0.0   67    12           57    -10
3    Fields Of Grace      4    60.0    3    7.50     5.0   68    2            58    -10
4    Storm Dominator      3    60.0    4    9.00     4.5   -     3            3     +3
5    Happy Vibes          3    60.0    5    9.05     4.5   -     3            3     +3
6    Summer Fling         3    58.5    6    10.00    4.5   -     -            -     +0
7    Silver Princess      4    58.5    7    12.50    5.0   48    -1           38    -10
8    She's A Klawer       2    60.0    8    13.00    3.0   67    6            57    -10
9    Idabelle             2    60.0    9    15.00    3.0   -     6            6     +6
10   Flight De Grace      5    60.0    10   17.00    0.0   -     12           12    +12
11   Ghost Ship           3    60.0    11   17.75    4.5   -     3            3     +3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Winter Muse - 78 3 +75 4.5 -
2 Poursomesugaronme 67 77 57 +20 0.0 -
3 Fields Of Grace 68 68 58 +10 5.0 -
4 Storm Dominator - 66 3 +63 4.5 -
5 Happy Vibes - 59 3 +56 4.5 -
6 Summer Fling Line - 50 - +50 4.5
7 Silver Princess 48 50 38 +12 5.0 -
8 She's A Klawer 67 50 57 -7 3.0 -
9 Idabelle - 70 6 +64 3.0 -
10 Flight De Grace - 45 12 +33 0.0 -
11 Ghost Ship - 68 3 +65 4.5 -
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