Official NHA Assessment

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

Back to Race
Line Horse
Hartenbos
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
3 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Dark Future          2    59.0    1    0.00     0.0   49    46           46    -3
2    Hartenbos            2    59.0    2    0.05     0.0   46    46           46    +0
3    Hemlock              2    60.0    3    1.30     0.0   -     51           51    +51
4    Silent Power         3    59.0    4    2.80     7.0   38    34           34    -4
99   Lion's Share         3    60.0    99   0.00     7.0   -     34           34    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dark Future 49 49 46 +3 0.0 -
2 Hartenbos Line 46 47 46 +1 0.0
3 Hemlock - 59 51 +8 0.0 -
4 Silent Power 38 42 34 +8 7.0 -
99 Lion's Share - 43 34 +9 7.0 -
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