Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION HYBRID STAKES (Open)

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Line Horse
Speed Machine
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
4 / 7
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    Resonate             3    57.5    1    0.00     2.5   104   98           98    -6
2    Speed Machine        4    60.0    2    0.40     0.0   108   108          108   +0
3    Barney Mcgrew        4    52.0    3    1.15     0.0   90    92           92    +2
4    His Choice           4    54.5    4    1.45     0.0   95    97           97    +2
5    Santa Maria          3    56.0    5    1.65     2.5   106   95           96    -10
6    Worlds Your Oyster   5    59.5    6    2.05     0.0   105   107          107   +2
7    Rockin' Ringo        6    57.0    7    2.55     0.0   100   102          102   +2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Resonate 104 103 98 +5 2.5 -
2 Speed Machine Line 108 104 108 -4 0.0
3 Barney Mcgrew 90 69 92 -23 0.0 -
4 His Choice 95 81 97 -16 0.0 -
5 Santa Maria 106 106 96 +10 2.5 -
6 Worlds Your Oyster 105 95 107 -12 0.0 -
7 Rockin' Ringo 100 107 102 +5 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