Official NHA Assessment

Race 5: RACEHORSE OWNERS ASSOCIATION PINNACLE STAKES (For all horses)

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Line Horse
Grazinginthegrass
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
2 / 9
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    Cherry Ano           5    61.0    1    0.00     0.0   104   107          107   +3
2    Grazinginthegrass    4    62.0    2    0.50     1.5   111   111          111   +0
3    Bush Tracker         6    62.0    3    2.75     0.0   108   111          111   +3
4    Brenden James        6    58.0    4    5.00     0.0   93    101          101   +8
5    Mount Anderson       8    59.5    5    8.75     0.0   104   104          104   +0
6    Mhlabeni             7    59.5    6    10.25    0.0   99    104          104   +5
7    Perfection           3    60.5    7    11.50    3.0   106   100          100   -6
8    Fight Song           4    58.0    8    20.00    1.5   94    98           98    +4
99   Sequoia              6    56.5    99   0.00     0.0   -     98           98    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cherry Ano 104 108 107 +1 0.0 -
2 Grazinginthegrass Line 111 111 111 ✓ Match 1.5
3 Bush Tracker 108 100 111 -11 0.0 -
4 Brenden James 93 98 101 -3 0.0 -
5 Mount Anderson 104 102 104 -2 0.0 -
6 Mhlabeni 99 90 104 -14 0.0 -
7 Perfection 106 103 100 +3 3.0 -
8 Fight Song 94 94 98 -4 1.5 -
99 Sequoia - 99 98 +1 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