Official NHA Assessment

Race 4: GALLOP FORM MIDDLE STAKES (For All Horses)

Back to Race
Line Horse
Plum Pudding
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Go Grayson Go        3    57.0    1    0.00     9.5   91    90           90    -1
2    Plum Pudding         3    54.5    2    3.00     9.5   88    88           88    +0
3    Bristol Hercules     2    57.0    3    3.40     0.0   88    112          112   +24
4    Afropolitan          6    55.5    4    4.40     0.0   84    107          107   +23
5    Down To Business     2    61.5    5    4.55     0.0   101   119          119   +18
6    Royal Invitation     5    54.5    6    9.15     0.0   87    104          104   +17
7    Trois Trois Quatre   5    58.5    7    11.45    0.0   94    112          112   +18
8    Sequoia              6    61.5    8    16.55    0.0   102   118          118   +16
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Go Grayson Go 91 95 90 +5 9.5 -
2 Plum Pudding Line 88 90 88 +2 9.5
3 Bristol Hercules 88 87 112 -25 0.0 -
4 Afropolitan 84 84 107 -23 0.0 -
5 Down To Business 101 100 119 -19 0.0 -
6 Royal Invitation 87 99 104 -5 0.0 -
7 Trois Trois Quatre 94 87 112 -25 0.0 -
8 Sequoia 102 99 118 -19 0.0 -
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