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 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
9 / 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    Grazinginthegrass    4    62.0    1    0.00     0.5   111   111          111   +0
2    Cherry Ano           5    62.0    2    2.50     0.0   111   114          114   +3
3    Runaway Song         6    61.0    3    2.55     0.0   105   112          112   +7
4    Magical Midlands     4    53.5    4    3.05     0.5   79    96           96    +17
5    Spin Doctor          3    55.0    5    3.10     1.5   82    97           97    +15
6    Global Ally          6    59.5    6    5.35     0.0   100   107          107   +7
7    Brenden James        6    58.0    7    5.85     0.0   93    104          104   +11
8    Mount Anderson       8    59.5    8    6.60     0.0   99    107          107   +8
9    Light Without        4    53.5    9    7.85     0.5   76    94           94    +18
10   Syx Hotfix           3    54.0    10   8.35     1.5   92    93           93    +1
11   Destiny Of Souls     2    56.5    11   11.85    0.0   89    101          101   +12
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Grazinginthegrass Line 111 111 111 ✓ Match 0.5
2 Cherry Ano 111 108 114 -6 0.0 -
3 Runaway Song 105 98 112 -14 0.0 -
4 Magical Midlands 79 79 96 -17 0.5 -
5 Spin Doctor 82 90 97 -7 1.5 -
6 Global Ally 100 97 107 -10 0.0 -
7 Brenden James 93 98 104 -6 0.0 -
8 Mount Anderson 99 102 107 -5 0.0 -
9 Light Without 76 71 94 -23 0.5 -
10 Syx Hotfix 92 83 93 -10 1.5 -
11 Destiny Of Souls 89 89 101 -12 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