Official NHA Assessment

Race 4: RADISSON BLU, DURBAN UMHLANGA CLASS 3 (Open. Benchmark at 60.0kg = 96)

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Line Horse
Queue Wing
Reference for assessment
Exact Matches
1 / 14
Calculated = Official
Close Matches
4 / 14
Within 2 points
Significant Diffs
7 / 14
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    Johnny The Thief     2    57.0    1    0.00     0.0   90    98           96    +6
2    Queue Wing           7    48.0    2    0.05     0.0   80    80           80    +0
3    Arverni King         5    56.0    3    0.15     0.0   88    96           96    +8
4    Tobacconist          2    53.5    4    0.45     0.0   83    96           96    +13
5    Gentleman Joe        3    53.0    5    2.95     2.5   82    87           87    +5
6    Destiny Of Fire      2    54.5    6    3.35     0.0   90    94           94    +4
7    Kaygee's Delight     4    57.5    7    5.25     1.0   91    97           97    +6
8    Sundance Kid         5    58.0    8    5.30     0.0   92    100          100   +8
9    View Of The World    3    54.5    9    5.35     2.5   90    88           88    -2
10   Noble City           3    57.0    10   5.95     2.5   98    93           93    -5
11   World Of Our Own     3    52.5    11   6.85     2.5   86    84           84    -2
12   Trois Trois Quatre   5    58.0    12   7.65     0.0   92    100          100   +8
13   Syx Hotfix           3    56.0    13   8.05     2.5   88    91           91    +3
14   Broadway Girl        5    56.5    14   12.55    0.0   89    97           97    +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Johnny The Thief 90 95 96 -1 0.0 -
2 Queue Wing Line 80 81 80 +1 0.0
3 Arverni King 88 86 96 -10 0.0 -
4 Tobacconist 83 81 96 -15 0.0 -
5 Gentleman Joe 82 83 87 -4 2.5 -
6 Destiny Of Fire 90 96 94 +2 0.0 -
7 Kaygee's Delight 91 89 97 -8 1.0 -
8 Sundance Kid 92 96 100 -4 0.0 -
9 View Of The World 90 78 88 -10 2.5 -
10 Noble City 98 93 93 ✓ Match 2.5 -
11 World Of Our Own 86 87 84 +3 2.5 -
12 Trois Trois Quatre 92 87 100 -13 0.0 -
13 Syx Hotfix 88 83 91 -8 2.5 -
14 Broadway Girl 89 89 97 -8 0.0 -
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