Official NHA Assessment

Race 2: WILGERBOSDRIFT MAIDEN PLATE (A) (For all Maidens)

Back to Race
Line Horse
Bob
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
7 / 7
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Bob                  3    60.0    1    0.00     4.5   83    83           83    +0
2    So Seductive         2    57.5    2    0.25     3.0   85    81           81    -4
3    Mr Blue Flame        3    60.0    3    10.25    4.5   54    83           83    +29
4    Path Of Power        3    60.0    4    11.50    4.5   -     83           83    +83
5    Pearl Harbor         2    56.0    5    13.50    3.0   66    78           78    +12
99   Precipeace           3    60.0    99   0.00     4.5   -     83           83    +0
99   Major Strides        3    60.0    99   0.00     4.5   -     83           83    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bob Line 83 52 83 -31 4.5
2 So Seductive 85 89 81 +8 3.0 -
3 Mr Blue Flame 54 59 83 -24 4.5 -
4 Path Of Power - 69 83 -14 4.5 -
5 Pearl Harbor 66 62 78 -16 3.0 -
99 Precipeace - - 83 -83 4.5 -
99 Major Strides - - 83 -83 4.5 -
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