Official NHA Assessment

Race 7: RACEHORSE OWNERS ASSOCIATION MR 81 HANDICAP (Open)

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Line Horse
Atkinson Grimshaw
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
2 / 8
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    Secret Is Ours       4    56.0    1    0.00     2.5   73    70           73    +0
2    King's Crusade       4    59.5    2    1.00     2.5   80    81           81    +1
3    Irish Rain           4    57.5    3    1.05     2.5   76    77           77    +1
4    Atkinson Grimshaw    4    58.5    4    1.55     2.5   78    78           78    +0
5    Alado's Pride        7    55.5    5    3.30     0.0   72    75           75    +3
6    Waiting For Summer   3    60.0    6    3.80     5.0   81    74           74    -7
7    Twice To Heaven      3    59.5    7    4.05     5.0   80    73           73    -7
99   Assured              4    59.5    99   0.00     2.5   -     77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Secret Is Ours 73 66 73 -7 2.5 -
2 King's Crusade 80 81 81 ✓ Match 2.5 -
3 Irish Rain 76 71 77 -6 2.5 -
4 Atkinson Grimshaw Line 78 75 78 -3 2.5
5 Alado's Pride 72 73 75 -2 0.0 -
6 Waiting For Summer 81 79 74 +5 5.0 -
7 Twice To Heaven 80 72 73 -1 5.0 -
99 Assured - 76 77 -1 2.5 -
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