Official NHA Assessment

Race 6: DAVE BULLOCK, DOUGLAS ROPER, SIMON RAHILLY, LAWRENCE RILEY CLASSIFIED STAKES (For horses with nett rating of 71 and belo

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Line Horse
Corvette Captain
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
7 / 13
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    Global Ransom        4    58.0    1    0.00     3.5   67    59           59    -8
2    Double Martini       4    54.5    2    0.50     3.5   60    52           52    -8
3    Twosidestoastory     3    54.5    3    1.75     3.0   66    53           56    -10
4    Twice As Splendid    3    60.0    4    2.00     3.0   75    64           65    -10
5    Corvette Captain     5    60.0    5    2.20     0.0   70    70           70    +0
6    Abalus               3    56.5    6    2.60     3.0   71    57           61    -10
7    Charge Down          4    58.0    7    3.00     3.5   66    59           59    -7
8    Paityns Pride        3    58.5    8    3.25     3.0   72    61           62    -10
9    Spiritofthegroove    5    58.5    9    5.75     0.0   69    67           67    -2
10   Tiki Taka            6    54.0    10   6.75     0.0   53    58           58    +5
11   Bridge Of Spies      6    54.0    11   9.00     0.0   51    58           58    +7
99   On The Warpath       3    54.0    99   0.00     3.0   -     52           52    +0
99   Grindelwald          6    58.5    99   0.00     0.0   -     67           67    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Global Ransom 67 69 59 +10 3.5 -
2 Double Martini 60 74 52 +22 3.5 -
3 Twosidestoastory 66 62 56 +6 3.0 -
4 Twice As Splendid 75 81 65 +16 3.0 -
5 Corvette Captain Line 70 75 70 +5 0.0
6 Abalus 71 64 61 +3 3.0 -
7 Charge Down 66 51 59 -8 3.5 -
8 Paityns Pride 72 66 62 +4 3.0 -
9 Spiritofthegroove 69 65 67 -2 0.0 -
10 Tiki Taka 53 48 58 -10 0.0 -
11 Bridge Of Spies 51 48 58 -10 0.0 -
99 On The Warpath - 50 52 -2 3.0 -
99 Grindelwald - 70 67 +3 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