Official NHA Assessment

Race 1: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Emily's Song (ZIM)
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
9 / 9
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    Al Mashriq           4    60.0    1    0.00     6.0   -     5            5     +5
2    Emily's Song (ZIM)   4    57.5    2    0.25     6.0   -     -            -     +0
3    Regulate             3    60.0    3    2.25     5.0   -     7            7     +7
4    Assume               3    57.5    4    3.00     5.0   55    2            45    -10
5    Manvir               3    60.0    5    10.00    5.0   -     7            7     +7
6    State Your Case      3    56.0    6    10.25    5.0   -     -1           -     +0
7    Ride The Lights      3    53.5    7    11.00    5.0   -     -6           -     +0
8    King Magnus          3    60.0    8    18.00    5.0   -     7            7     +7
9    Cosmic Rush          3    60.0    9    27.00    5.0   46    7            36    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Al Mashriq - 71 5 +66 6.0 -
2 Emily's Song (ZIM) Line - 66 - +66 6.0
3 Regulate - 79 7 +72 5.0 -
4 Assume 55 58 45 +13 5.0 -
5 Manvir - 52 7 +45 5.0 -
6 State Your Case - 40 - +40 5.0 -
7 Ride The Lights - 38 - +38 5.0 -
8 King Magnus - 22 7 +15 5.0 -
9 Cosmic Rush 46 28 36 -8 5.0 -
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