Official NHA Assessment

Race 1: #THISISRACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (For all Maidens)

Back to Race
Line Horse
Blackburn Jet
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
7 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Desert Crusader      3    60.0    1    0.00     3.5   52    48           48    -4
2    Big Five             3    60.0    2    2.75     3.5   49    48           48    -1
3    Blackburn Jet        3    60.0    3    4.75     3.5   48    48           48    +0
4    Musical Kiss         3    57.5    4    9.50     3.5   61    43           51    -10
5    Mansooriya           3    57.5    5    11.00    3.5   -     43           43    +43
6    Red Aura             3    60.5    6    12.75    3.5   55    49           49    -6
7    Spiderhead           3    60.0    7    13.00    3.5   40    48           48    +8
8    The Punisher         4    60.0    8    14.00    4.0   10    47           47    +37
9    Earl of Cardigan     3    60.0    9    14.75    3.5   70    48           60    -10
10   Coming In Hot        3    60.0    10   15.00    3.5   63    48           53    -10
11   Tara Iti             4    60.0    11   30.00    4.0   54    47           47    -7
99   Copernicus           3    60.0    99   0.00     3.5   -     48           48    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Desert Crusader 52 54 48 +6 3.5 -
2 Big Five 49 53 48 +5 3.5 -
3 Blackburn Jet Line 48 50 48 +2 3.5
4 Musical Kiss 61 53 51 +2 3.5 -
5 Mansooriya - 52 43 +9 3.5 -
6 Red Aura 55 49 49 ✓ Match 3.5 -
7 Spiderhead 40 37 48 -11 3.5 -
8 The Punisher 10 15 47 -32 4.0 -
9 Earl of Cardigan 70 50 60 -10 3.5 -
10 Coming In Hot 63 76 53 +23 3.5 -
11 Tara Iti 54 52 47 +5 4.0 -
99 Copernicus - 67 48 +19 3.5 -
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