Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION MIDDLE STAKES (For horses with nett rating of 101 and below)

Back to Race
Line Horse
Battleground
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
5 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Flying Bull          4    60.0    1    0.00     5.0   96    84           84    -12
2    Battleground         5    54.5    2    1.75     0.0   87    87           87    +0
3    Professor Snape      2    54.0    3    3.50     0.0   87    84           84    -3
4    Rule Book            6    52.5    4    4.25     0.0   80    81           81    +1
99   Street Art           3    62.0    99   0.00     8.5   -     81           81    +0
99   Mambo Come Tesio     3    52.0    99   0.00     8.5   -     61           61    +0
99   Luthuli              5    50.0    99   0.00     0.0   -     74           74    +0
99   Out Of Your League   5    50.0    99   0.00     0.0   -     74           74    +0
99   Explosive Bond       4    48.5    99   0.00     5.0   -     61           61    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Flying Bull 96 98 84 +14 5.0 -
2 Battleground Line 87 92 87 +5 0.0
3 Professor Snape 87 68 84 -16 0.0 -
4 Rule Book 80 92 81 +11 0.0 -
99 Street Art - 78 81 -3 8.5 -
99 Mambo Come Tesio - 80 61 +19 8.5 -
99 Luthuli - 74 74 ✓ Match 0.0 -
99 Out Of Your League - 77 74 +3 0.0 -
99 Explosive Bond - 94 61 +33 5.0 -
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