Official NHA Assessment

Race 4: BETWAY MR 96 HANDICAP (Open)

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Line Horse
Imperial Master
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
4 / 7
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    Thunee Playa         4    55.0    1    0.00     5.0   88    81           88    +0
2    Tamarisk Tree        5    57.0    2    0.50     0.0   90    102          102   +12
3    Imperial Master      4    58.5    3    2.10     5.0   93    93           93    +0
4    Scarlett Pimpernel   2    59.5    4    5.20     0.0   97    100          100   +3
5    Sugar Blast          2    59.0    5    7.00     0.0   101   99           99    -2
6    Apache Son           4    55.0    6    11.30    5.0   88    81           81    -7
7    Hawkbill             4    55.5    7    11.40    5.0   89    82           82    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Thunee Playa 88 107 88 +19 5.0 -
2 Tamarisk Tree 90 105 102 +3 0.0 -
3 Imperial Master Line 93 90 93 -3 5.0
4 Scarlett Pimpernel 97 90 100 -10 0.0 -
5 Sugar Blast 101 102 99 +3 0.0 -
6 Apache Son 88 89 81 +8 5.0 -
7 Hawkbill 89 100 82 +18 5.0 -
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