Official NHA Assessment

Race 7: #THISISRACING PINNACLE STAKES (For all horses)

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Line Horse
Grazinginthegrass
Reference for assessment
Exact Matches
1 / 14
Calculated = Official
Close Matches
2 / 14
Within 2 points
Significant Diffs
8 / 14
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    Herodotus            6    59.5    1    0.00     0.0   96    97           97    +1
2    Marmara Sea          5    62.0    2    0.50     0.0   106   109          109   +3
3    Grazinginthegrass    4    61.0    3    1.75     0.5   104   104          104   +0
4    Rattle Mouse         5    51.5    4    2.75     0.0   85    84           84    -1
5    Never Ending Rain    3    59.5    5    3.25     1.5   101   97           97    -4
6    Waiting For Summer   3    55.0    6    4.00     1.5   87    87           87    +0
7    Legitimate           4    58.0    7    4.25     0.5   94    95           95    +1
8    Divine Odyssey       7    62.0    8    5.75     0.0   113   102          103   -10
9    Jacob's Ladder       4    53.5    9    7.00     0.5   83    84           84    +1
10   First Street         5    56.0    10   7.50     0.0   96    90           90    -6
11   Assured              4    49.5    11   10.50    0.5   80    76           76    -4
12   Cairon               5    55.5    12   13.00    0.0   82    89           89    +7
13   Great Warrior        5    55.0    13   24.50    0.0   82    88           88    +6
14   Christopher Robin    5    62.0    14   99.99    0.0   111   102          102   -9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Herodotus 96 102 97 +5 0.0 -
2 Marmara Sea 106 101 109 -8 0.0 -
3 Grazinginthegrass Line 104 111 104 +7 0.5
4 Rattle Mouse 85 85 84 +1 0.0 -
5 Never Ending Rain 101 101 97 +4 1.5 -
6 Waiting For Summer 87 79 87 -8 1.5 -
7 Legitimate 94 89 95 -6 0.5 -
8 Divine Odyssey 113 107 103 +4 0.0 -
9 Jacob's Ladder 83 73 84 -11 0.5 -
10 First Street 96 97 90 +7 0.0 -
11 Assured 80 76 76 ✓ Match 0.5 -
12 Cairon 82 73 89 -16 0.0 -
13 Great Warrior 82 78 88 -10 0.0 -
14 Christopher Robin 111 106 102 +4 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