Official NHA Assessment

Race 6: GALLOP TV MR 68 HANDICAP (Open)

Back to Race
Line Horse
Purple Powahouse
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
5 / 10
Within 2 points
Significant Diffs
1 / 10
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Northern Warrior     7    59.5    1    0.00     0.0   70    67           70    +0
2    Cotton Ron           6    56.5    2    1.20     0.0   61    61           61    +0
3    Purple Powahouse     8    56.0    3    1.70     0.0   60    60           60    +0
4    Buster Keaton        3    56.5    4    2.10     1.5   61    58           58    -3
5    Spirited Flight      5    56.0    5    2.80     0.0   60    60           60    +0
6    Daring Act           4    57.5    6    6.40     2.0   72    59           62    -10
7    Arverni Princess     2    58.0    7    7.00     0.5   65    63           63    -2
8    Granddaddy Purple    3    52.0    8    7.30     1.5   50    49           49    -1
9    Trade War            3    57.0    9    9.00     1.5   70    59           60    -10
10   Gold Agent           2    60.5    10   14.60    0.5   70    68           68    -2
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Northern Warrior 70 73 70 +3 0.0 -
2 Cotton Ron 61 59 61 -2 0.0 -
3 Purple Powahouse Line 60 55 60 -5 0.0
4 Buster Keaton 61 60 58 +2 1.5 -
5 Spirited Flight 60 61 60 +1 0.0 -
6 Daring Act 72 60 62 -2 2.0 -
7 Arverni Princess 65 67 63 +4 0.5 -
8 Granddaddy Purple 50 50 49 +1 1.5 -
9 Trade War 70 70 60 +10 1.5 -
10 Gold Agent 70 64 68 -4 0.5 -
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