Official NHA Assessment

Race 3: TAB 4RACING APP OPEN MAIDEN (F & M) (For Maidens F&M. R15 000 Win bonus ROA Members)

Back to Race
Line Horse
Royal Venus
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Vandalise            2    58.0    1    0.00     1.0   -     61           6     +6
2    Royal Venus          2    51.5    2    2.25     1.0   48    48           48    +0
3    Hundredfifthavenue   2    59.0    3    3.00     1.0   66    63           63    -3
4    Duchess Of Africa    6    50.5    4    5.25     0.0   35    48           48    +13
5    Minstrel Gallery     2    56.0    5    6.00     1.0   60    57           57    -3
6    Tune Again           6    61.0    6    13.25    0.0   -     69           69    +69
99   Fly Better           3    54.0    99   0.00     2.0   -     51           51    +0
99   Heart Of Eternity    3    58.0    99   0.00     2.0   -     59           59    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Vandalise - 67 6 +61 1.0 -
2 Royal Venus Line 48 50 48 +2 1.0
3 Hundredfifthavenue 66 57 63 -6 1.0 -
4 Duchess Of Africa 35 37 48 -11 0.0 -
5 Minstrel Gallery 60 48 57 -9 1.0 -
6 Tune Again - 50 69 -19 0.0 -
99 Fly Better - 45 51 -6 2.0 -
99 Heart Of Eternity - 49 59 -10 2.0 -
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