Official NHA Assessment

Race 4: RACING TODAY WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M)

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Line Horse
Intro
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 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    Lady Noir            2    56.0    1    0.00     0.0   -     67           6     +6
2    Intro                3    60.0    2    4.00     2.5   71    71           71    +0
3    Bella Boop Boop      3    60.0    3    11.00    2.5   63    70           70    +7
4    Flightlight          3    60.0    4    11.25    2.5   63    70           70    +7
5    Trail Compass        3    60.0    5    99.99    2.5   -     70           70    +70
6    Mrs Wonderful        3    60.0    6    99.99    2.5   10    70           70    +60
99   Lava Lamp            3    60.0    99   0.00     2.5   -     70           70    +0
99   On A Jet Plane       3    60.0    99   0.00     2.5   -     70           70    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Lady Noir - 83 6 +77 0.0 -
2 Intro Line 71 66 71 -5 2.5
3 Bella Boop Boop 63 58 70 -12 2.5 -
4 Flightlight 63 61 70 -9 2.5 -
5 Trail Compass - 20 70 -50 2.5 -
6 Mrs Wonderful 10 20 70 -50 2.5 -
99 Lava Lamp - 84 70 +14 2.5 -
99 On A Jet Plane - 71 70 +1 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