Official NHA Assessment

Race 5: BETWAY PINNACLE STAKES (Open)

Back to Race
Line Horse
Dyce
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 7
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Dyce                 6    62.0    1    0.00     0.0   128   128          128   +0
2    William Robertson    6    59.5    2    1.25     0.0   125   123          123   -2
3    Quantum Theory       5    56.0    3    3.25     0.0   111   116          116   +5
4    Winter Greeting      5    54.5    4    4.75     0.0   111   113          113   +2
5    Mrs Browning         5    58.5    5    6.75     0.0   118   121          121   +3
6    Tail Of The Comet    4    54.0    6    12.00    9.0   106   94           96    -10
99   Mount Pinatubo       2    50.0    99   0.00     5.0   -     94           94    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dyce Line 128 128 128 ✓ Match 0.0
2 William Robertson 125 124 123 +1 0.0 -
3 Quantum Theory 111 112 116 -4 0.0 -
4 Winter Greeting 111 104 113 -9 0.0 -
5 Mrs Browning 118 115 121 -6 0.0 -
6 Tail Of The Comet 106 79 96 -17 9.0 -
99 Mount Pinatubo - 109 94 +15 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