Official NHA Assessment

Race 5: CENTENARY CLUB MIDDLE STAKES (For All Horses)

Back to Race
Line Horse
Go Grayson Go
Reference for assessment
Exact Matches
3 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
5 / 11
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Sword Speed          3    49.5    1    0.00     4.5   81    68           68    -13
2    Go Grayson Go        3    60.0    2    0.80     4.5   95    95           95    +0
3    French Trip          4    55.5    3    2.90     2.0   88    88           88    +0
4    Bruh                 2    55.5    4    3.10     0.0   95    92           92    -3
5    Actor                2    55.5    5    3.20     0.0   85    92           92    +7
6    Plum Pudding         3    54.5    6    3.90     4.5   90    80           80    -10
7    Trois Trois Quatre   5    57.0    7    5.00     0.0   89    92           92    +3
8    Saxon Dynasty        3    57.0    8    5.20     4.5   87    83           83    -4
9    African Dusk         5    53.0    9    6.80     0.0   83    84           84    +1
10   Vihaan's Bomb        3    54.5    10   8.00     4.5   88    78           78    -10
11   Duke Of Africa       5    52.5    11   14.50    0.0   76    83           83    +7
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sword Speed 81 87 68 +19 4.5 -
2 Go Grayson Go Line 95 95 95 ✓ Match 4.5
3 French Trip 88 88 88 ✓ Match 2.0 -
4 Bruh 95 92 92 ✓ Match 0.0 -
5 Actor 85 85 92 -7 0.0 -
6 Plum Pudding 90 90 80 +10 4.5 -
7 Trois Trois Quatre 89 87 92 -5 0.0 -
8 Saxon Dynasty 87 87 83 +4 4.5 -
9 African Dusk 83 83 84 -1 0.0 -
10 Vihaan's Bomb 88 86 78 +8 4.5 -
11 Duke Of Africa 76 76 83 -7 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