Official NHA Assessment

Race 3: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 70 HANDICAP (Open)

Back to Race
Line Horse
Viva De Janeiro
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
5 / 11
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Clarkson             4    59.0    1    0.00     0.5   68    64           68    +0
2    Viva De Janeiro      5    54.5    2    2.10     0.0   59    59           59    +0
3    Coppola              4    60.5    3    2.30     0.5   71    69           69    -2
4    Guerilla Warfare     3    60.5    4    2.70     1.5   74    67           67    -7
5    Unsolved Riddle      3    61.0    5    3.20     1.5   72    68           68    -4
6    Spy Story            3    61.0    6    3.50     1.5   75    67           67    -8
7    Panning Gold         3    62.5    7    6.50     1.5   78    69           69    -9
8    Vava Vegas           5    54.5    8    8.00     0.0   67    56           57    -10
9    Circle Of Grace      4    54.0    9    8.50     0.5   61    54           54    -7
99   Count Your Chances   5    54.5    99   0.00     0.0   -     56           56    +0
99   Sovereigns Call      4    63.0    99   0.00     0.5   -     72           72    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Clarkson 68 75 68 +7 0.5 -
2 Viva De Janeiro Line 59 50 59 -9 0.0
3 Coppola 71 83 69 +14 0.5 -
4 Guerilla Warfare 74 75 67 +8 1.5 -
5 Unsolved Riddle 72 77 68 +9 1.5 -
6 Spy Story 75 66 67 -1 1.5 -
7 Panning Gold 78 68 69 -1 1.5 -
8 Vava Vegas 67 58 57 +1 0.0 -
9 Circle Of Grace 61 51 54 -3 0.5 -
99 Count Your Chances - 51 56 -5 0.0 -
99 Sovereigns Call - 70 72 -2 0.5 -
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