Official NHA Assessment

Race 5: BETWAY BOOST PINNACLE STAKES (Open to all horses)

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Line Horse
Top Sail
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 9
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    Zeus                 3    58.0    1    0.00     9.5   98    78           78    -20
2    Top Sail             2    54.0    2    4.25     0.0   91    91           91    +0
3    Flying Bull          4    58.0    3    4.75     6.0   98    85           88    -10
4    Arumugam             6    60.0    4    7.25     0.0   102   101          101   -1
5    Afraad               8    54.5    5    11.25    0.0   75    90           90    +15
6    Opera Glass          4    50.5    6    12.00    6.0   90    70           80    -10
7    Twin Turbo           4    54.0    7    14.25    6.0   89    77           79    -10
8    London Roads         3    54.0    8    99.99    9.5   80    70           70    -10
99   Out Of Your League   5    54.0    99   0.00     0.0   -     89           89    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zeus 98 117 78 +39 9.5 -
2 Top Sail Line 91 85 91 -6 0.0
3 Flying Bull 98 98 88 +10 6.0 -
4 Arumugam 102 74 101 -27 0.0 -
5 Afraad 75 79 90 -11 0.0 -
6 Opera Glass 90 81 80 +1 6.0 -
7 Twin Turbo 89 88 79 +9 6.0 -
8 London Roads 80 78 70 +8 9.5 -
99 Out Of Your League - 77 89 -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