Official NHA Assessment

Race 4: CENTENARY CLUB CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 82)

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Line Horse
Beneath The Clouds
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 10
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    Strawberry Thief     3    61.0    1    0.00     9.0   86    82           82    -4
2    Lavender Bay         4    59.5    2    0.05     5.0   81    87           87    +6
3    Beneath The Clouds   3    60.0    3    1.05     9.0   84    84           84    +0
4    Heliotrope           3    54.5    4    1.80     9.0   71    72           72    +1
5    Beautiful Side       3    54.0    5    3.55     9.0   72    69           69    -3
6    Hunga Tonga          3    58.0    6    3.75     9.0   80    77           77    -3
7    Pentolina            3    57.5    7    4.50     9.0   79    75           75    -4
8    Double Dash          2    54.0    8    7.50     0.0   72    86           86    +14
9    Princess Of Bayeux   2    57.0    9    13.00    0.0   76    92           92    +16
10   Omikami              2    60.5    10   19.50    0.0   88    99           99    +11
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Strawberry Thief 86 89 82 +7 9.0 -
2 Lavender Bay 81 95 87 +8 5.0 -
3 Beneath The Clouds Line 84 83 84 -1 9.0
4 Heliotrope 71 67 72 -5 9.0 -
5 Beautiful Side 72 63 69 -6 9.0 -
6 Hunga Tonga 80 78 77 +1 9.0 -
7 Pentolina 79 80 75 +5 9.0 -
8 Double Dash 72 69 86 -17 0.0 -
9 Princess Of Bayeux 76 75 92 -17 0.0 -
10 Omikami 88 83 99 -16 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