Official NHA Assessment

Race 7: RACEHORSE OWNERS ASSOCIATION MIDDLE STAKES (For horses with nett rating of 105 and below)

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Line Horse
Open Highway
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
3 / 11
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    Bob's Your Uncle     5    55.0    1    0.00     0.0   88    87           87    -1
2    Open Highway         4    50.5    2    0.60     1.0   81    81           81    +0
3    Tsar Bomba           3    58.0    3    0.80     2.0   95    93           93    -2
4    Captainofthegreen    3    58.0    4    2.90     2.0   96    91           91    -5
5    Presley              4    58.0    5    2.95     1.0   94    93           93    -1
6    The Africa House     4    56.0    6    4.05     1.0   93    88           88    -5
7    Moola Man            4    52.0    7    8.25     1.0   84    79           79    -5
8    Happy Mo             3    54.5    8    8.75     2.0   91    82           82    -9
9    Cian The Conqueror   5    52.0    9    11.50    0.0   84    81           81    -3
99   Zuzan                3    60.0    99   0.00     2.0   -     93           93    +0
99   Wyzeact              4    55.0    99   0.00     1.0   -     85           85    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bob's Your Uncle 88 103 87 +16 0.0 -
2 Open Highway Line 81 94 81 +13 1.0
3 Tsar Bomba 95 91 93 -2 2.0 -
4 Captainofthegreen 96 96 91 +5 2.0 -
5 Presley 94 90 93 -3 1.0 -
6 The Africa House 93 93 88 +5 1.0 -
7 Moola Man 84 75 79 -4 1.0 -
8 Happy Mo 91 89 82 +7 2.0 -
9 Cian The Conqueror 84 81 81 ✓ Match 0.0 -
99 Zuzan - 98 93 +5 2.0 -
99 Wyzeact - 86 85 +1 1.0 -
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