Official NHA Assessment

Race 5: SA DERBY 4 APRIL MR 100 HANDICAP (Open)

Back to Race
Line Horse
Taegan's Champ
Reference for assessment
Exact Matches
2 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
2 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Tommy Shelby         2    53.5    1    0.00     0.0   97    94           97    +0
2    Robert Browning      3    53.0    2    1.00     5.0   86    87           87    +1
3    Taegan's Champ       3    61.5    3    1.60     5.0   103   103          103   +0
4    Apache Son           4    54.5    4    1.90     2.5   89    94           94    +5
5    Daimyo               3    59.5    5    4.40     5.0   99    96           96    -3
6    Soldier's Eye        4    57.0    6    4.70     2.5   97    96           96    -1
7    One More Star        3    52.0    7    5.00     5.0   84    81           81    -3
8    King's Express       3    61.0    8    8.00     5.0   102   99           99    -3
99   Royal Edition        4    56.5    99   0.00     2.5   -     95           95    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tommy Shelby 97 101 97 +4 0.0 -
2 Robert Browning 86 87 87 ✓ Match 5.0 -
3 Taegan's Champ Line 103 103 103 ✓ Match 5.0
4 Apache Son 89 89 94 -5 2.5 -
5 Daimyo 99 105 96 +9 5.0 -
6 Soldier's Eye 97 94 96 -2 2.5 -
7 One More Star 84 87 81 +6 5.0 -
8 King's Express 102 102 99 +3 5.0 -
99 Royal Edition - 92 95 -3 2.5 -
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