Official NHA Assessment

Race 6: MICHAEL ROBERTS STAKES (Listed) (For All Horses)

Back to Race
Line Horse
News Stream
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
8 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Cape Eagle           7    57.5    1    0.00     0.0   89    87           87    -2
2    Juan Carlos          7    57.5    2    2.80     0.0   84    89           89    +5
3    Aquae Sulis          5    55.0    3    3.00     0.0   83    84           84    +1
4    Dawnofanewday        3    59.0    4    3.70     6.0   99    79           89    -10
5    News Stream          6    57.5    5    3.80     0.0   88    88           88    +0
6    Queue Wing           7    58.5    6    4.10     0.0   92    90           90    -2
7    Bayview Express      5    57.5    7    4.80     0.0   74    87           87    +13
8    Artic Tune           4    57.5    8    5.05     3.0   82    81           81    -1
9    Back To Black        4    60.0    9    6.95     3.0   95    86           86    -9
10   Lady Serena          3    55.0    10   7.15     6.0   78    70           70    -8
11   Fight Song           4    57.5    11   7.45     3.0   89    81           81    -8
12   I Am Regal           5    55.0    12   21.55    0.0   86    82           82    -4
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cape Eagle 89 106 87 +19 0.0 -
2 Juan Carlos 84 93 89 +4 0.0 -
3 Aquae Sulis 83 69 84 -15 0.0 -
4 Dawnofanewday 99 107 89 +18 6.0 -
5 News Stream Line 88 83 88 -5 0.0
6 Queue Wing 92 81 90 -9 0.0 -
7 Bayview Express 74 62 87 -25 0.0 -
8 Artic Tune 82 81 81 ✓ Match 3.0 -
9 Back To Black 95 89 86 +3 3.0 -
10 Lady Serena 78 80 70 +10 6.0 -
11 Fight Song 89 94 81 +13 3.0 -
12 I Am Regal 86 75 82 -7 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