Official NHA Assessment

Race 8: NEXT VAAL RACEMEETING THURSDAY 23 OCTOBER CLASSIFIED STAKES (For horses with nett rating of 75 and below)

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Line Horse
Trident King
Reference for assessment
Exact Matches
3 / 12
Calculated = Official
Close Matches
5 / 12
Within 2 points
Significant Diffs
5 / 12
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Arlington Action     6    56.0    1    0.00     0.0   67    81           73    +6
2    Cartagena            4    54.0    2    2.50     6.0   67    69           69    +2
3    Trident King         3    58.0    3    3.20     9.5   69    69           69    +0
4    Majalun              3    50.0    4    3.50     9.5   66    52           56    -10
5    Volte Face           3    58.0    5    4.00     9.5   68    68           68    +0
6    Rosy Lemon           5    56.0    6    5.00     0.0   69    81           81    +12
7    Romeo's Magic        7    56.0    7    5.50     0.0   74    81           81    +7
8    Gold De Grace        4    52.0    8    8.20     6.0   56    61           61    +5
9    Royal Mazarin        4    58.0    9    8.30     6.0   71    73           73    +2
10   Nuclear Force        5    56.0    10   12.10    0.0   67    81           81    +14
11   Party Punch          3    56.0    11   13.20    9.5   72    62           62    -10
12   That's Magical       3    52.5    12   24.00    9.5   61    55           55    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arlington Action 67 73 73 ✓ Match 0.0 -
2 Cartagena 67 77 69 +8 6.0 -
3 Trident King Line 69 65 69 -4 9.5
4 Majalun 66 56 56 ✓ Match 9.5 -
5 Volte Face 68 66 68 -2 9.5 -
6 Rosy Lemon 69 72 81 -9 0.0 -
7 Romeo's Magic 74 73 81 -8 0.0 -
8 Gold De Grace 56 51 61 -10 6.0 -
9 Royal Mazarin 71 70 73 -3 6.0 -
10 Nuclear Force 67 61 81 -20 0.0 -
11 Party Punch 72 62 62 ✓ Match 9.5 -
12 That's Magical 61 54 55 -1 9.5 -
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