Official NHA Assessment

Race 2: #YOUCANBETONUS! MAIDEN PLATE (For all Maidens)

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Line Horse
Brooksider
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
3 / 7
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    Brooksider           3    60.0    1    0.00     1.5   63    63           63    +0
2    Ivy                  2    50.5    2    0.75     0.5   -     46           46    +46
3    Flight Engineer      3    60.0    3    0.80     1.5   63    63           63    +0
4    Stand Up             3    60.0    4    1.55     1.5   51    63           63    +12
5    Monocle              3    60.0    5    2.05     1.5   52    63           63    +11
6    Am Still Winning     3    55.0    6    2.30     1.5   50    53           53    +3
7    Like A Butterfly     3    57.5    7    3.55     1.5   59    58           58    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Brooksider Line 63 55 63 -8 1.5
2 Ivy - 67 46 +21 0.5 -
3 Flight Engineer 63 58 63 -5 1.5 -
4 Stand Up 51 62 63 -1 1.5 -
5 Monocle 52 52 63 -11 1.5 -
6 Am Still Winning 50 51 53 -2 1.5 -
7 Like A Butterfly 59 54 58 -4 1.5 -
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