Official NHA Assessment

Race 6: 4RACING.TV WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
On The Guest List
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
8 / 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    On The Guest List    2    60.0    1    0.00     0.0   68    68           68    +0
2    Impression           3    60.0    2    1.50     3.5   65    64           64    -1
3    Dame Colleen         3    60.0    3    2.25     3.5   54    64           64    +10
4    Coffee In Brazil     3    60.0    4    6.00     3.5   58    61           61    +3
5    Alabama Storm        2    60.0    5    6.50     0.0   49    68           68    +19
6    Flight De Grace      5    60.0    6    6.55     0.0   40    68           68    +28
7    Cilantro             3    60.0    7    6.75     3.5   58    61           61    +3
8    Apache Sunrise       3    60.0    8    99.99    3.5   -     61           61    +61
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 On The Guest List Line 68 57 68 -11 0.0
2 Impression 65 51 64 -13 3.5 -
3 Dame Colleen 54 46 64 -18 3.5 -
4 Coffee In Brazil 58 49 61 -12 3.5 -
5 Alabama Storm 49 47 68 -21 0.0 -
6 Flight De Grace 40 45 68 -23 0.0 -
7 Cilantro 58 54 61 -7 3.5 -
8 Apache Sunrise - 10 61 -51 3.5 -
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