Official NHA Assessment

Race 5: SA DERBY 4 APRIL MR 66 HANDICAP (Open)

Back to Race
Line Horse
Full Go
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
4 / 11
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    World Order          2    62.0    1    0.00     0.0   80    67           80    +0
2    Full Go              6    56.5    2    1.40     0.0   59    59           59    +0
3    Fushimi Inari        2    51.0    3    1.80     0.0   56    48           48    -8
4    Circle Of Grace      4    53.0    4    2.00     2.5   52    47           47    -5
5    Hat Furious          4    55.5    5    2.75     2.5   57    51           51    -6
6    Casus Belli          3    56.5    6    3.75     5.0   62    47           52    -10
7    Crepuscolo           4    56.0    7    4.15     2.5   58    51           51    -7
8    Thambi               5    53.5    8    6.75     0.0   58    50           50    -8
9    Hopscotch            2    57.5    9    8.05     0.0   71    58           61    -10
10   Peace Treaty         3    61.5    10   11.75    5.0   69    56           59    -10
11   Mizzen Sword         3    60.5    11   13.25    5.0   67    54           57    -10
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 World Order 80 84 80 +4 0.0 -
2 Full Go Line 59 59 59 ✓ Match 0.0
3 Fushimi Inari 56 53 48 +5 0.0 -
4 Circle Of Grace 52 51 47 +4 2.5 -
5 Hat Furious 57 53 51 +2 2.5 -
6 Casus Belli 62 64 52 +12 5.0 -
7 Crepuscolo 58 58 51 +7 2.5 -
8 Thambi 58 55 50 +5 0.0 -
9 Hopscotch 71 66 61 +5 0.0 -
10 Peace Treaty 69 69 59 +10 5.0 -
11 Mizzen Sword 67 66 57 +9 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