Official NHA Assessment

Race 6: WORLD SPORTS BETTING SWEET CHESTNUT STAKES (Listed) (For 3 yo Fillies (1st Leg of the Winter Series))

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Line Horse
She's A Rainbow
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
5 / 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    Young Love           3    59.0    1    0.00     2.5   84    97           90    +6
2    Going Up             3    59.0    2    0.40     2.5   85    102          102   +17
3    She's A Rainbow      3    59.0    3    4.65     2.5   97    97           97    +0
4    Maria Querol         3    60.0    4    6.15     2.5   100   99           99    -1
5    Island Treasure      3    59.0    5    7.40     2.5   85    97           97    +12
6    Irish Wildflower     3    59.0    6    11.15    2.5   76    97           97    +21
7    Dancetildaylight     3    59.0    7    13.40    2.5   100   97           97    -3
99   Warm Welcome         3    59.0    99   0.00     2.5   -     97           97    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Young Love 84 95 90 +5 2.5 -
2 Going Up 85 110 102 +8 2.5 -
3 She's A Rainbow Line 97 85 97 -12 2.5
4 Maria Querol 100 96 99 -3 2.5 -
5 Island Treasure 85 73 97 -24 2.5 -
6 Irish Wildflower 76 68 97 -29 2.5 -
7 Dancetildaylight 100 92 97 -5 2.5 -
99 Warm Welcome - 86 97 -11 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