Official NHA Assessment

Race 6: DAVE BULLOCK, DOUGLAS ROPER, SIMON RAHILLY, LAWRENCE RILEY MR 106 HANDICAP (Open)

Back to Race
Line Horse
Cosmic Star
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
3 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Ready To Charge      2    61.0    1    0.00     2.0   108   110          108   +0
2    Cosmic Star          3    60.0    2    0.30     3.0   106   106          106   +0
3    Chyavana             3    59.0    3    2.10     3.0   104   104          104   +0
4    One Fell Swoop       2    58.5    4    2.30     2.0   103   105          105   +2
5    Yamadori             4    57.0    5    3.90     3.5   100   99           99    -1
6    Magic Tattoo         5    59.5    6    4.20     0.0   105   111          111   +6
99   Dreamland            4    57.5    99   0.00     3.5   -     100          100   +0
99   Sheldon              6    61.0    99   0.00     0.0   -     114          114   +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ready To Charge 108 110 108 +2 2.0 -
2 Cosmic Star Line 106 105 106 -1 3.0
3 Chyavana 104 106 104 +2 3.0 -
4 One Fell Swoop 103 97 105 -8 2.0 -
5 Yamadori 100 97 99 -2 3.5 -
6 Magic Tattoo 105 93 111 -18 0.0 -
99 Dreamland - 103 100 +3 3.5 -
99 Sheldon - 106 114 -8 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