Official NHA Assessment

Race 4: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 96 HANDICAP (Open)

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Line Horse
Tchaikovsky
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
10 / 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    Laguna Verde         5    59.0    1    0.00     0.0   94    91           94    +0
2    Tirpitz              6    55.5    2    1.20     0.0   87    88           88    +1
3    Tchaikovsky          6    56.0    3    2.20     0.0   88    88           88    +0
4    Whispers Of War (AU  7    54.5    4    4.20     0.0   88    83           83    -5
5    Tizona               3    56.5    5    5.00     5.0   89    76           79    -10
6    Tsar Bomba           3    58.5    6    5.05     5.0   93    80           83    -10
7    Suryavarman          2    57.0    7    9.25     0.0   90    87           87    -3
99   Argo Alley           2    59.0    99   0.00     0.0   -     91           91    +0
99   On The Horizon       4    59.0    99   0.00     2.5   -     86           86    +0
99   Captain Of Grit      3    55.0    99   0.00     5.0   -     73           73    +0
99   Fast Love            4    58.0    99   0.00     2.5   -     84           84    +0
99   Team Gold            3    60.5    99   0.00     5.0   -     84           84    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Laguna Verde 94 86 94 -8 0.0 -
2 Tirpitz 87 82 88 -6 0.0 -
3 Tchaikovsky Line 88 81 88 -7 0.0
4 Whispers Of War (AUS) 88 64 83 -19 0.0 -
5 Tizona 89 83 79 +4 5.0 -
6 Tsar Bomba 93 91 83 +8 5.0 -
7 Suryavarman 90 84 87 -3 0.0 -
99 Argo Alley - 110 91 +19 0.0 -
99 On The Horizon - 100 86 +14 2.5 -
99 Captain Of Grit - 84 73 +11 5.0 -
99 Fast Love - 90 84 +6 2.5 -
99 Team Gold - 97 84 +13 5.0 -
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